技术领域technical field
本申请涉及无线通信，尤其涉及时分双工(TDD)无线通信系统中的自动增益控制(AGC)。The present application relates to wireless communication, and more particularly to automatic gain control (AGC) in time division duplex (TDD) wireless communication systems.
背景技术Background technique
无线通信终端中，由于无线信道的衰落效应(路径损耗，阴影衰落，多径衰落等)，以及业务负载的变化，会造成接收信号的幅度和功率的动态的大幅度变化。针对这种动态范围较大的信号会导致的信号量化失真，一般使用自动增益控制(Automatic gain control，AGC)技术来解决。在不增加模数转换器(Analog to Digital Converter，ADC)的字长的前提下，将大动态范围的信号自动调整为适合于ADC字长的动态范围，来减少量化失真。采用AGC技术的另一个好处是降低实现成本，采用较小的ADC的字长，获得足够的量化精度，并降低了后续基带电路的实现复杂度。In the wireless communication terminal, due to the fading effect of the wireless channel (path loss, shadow fading, multipath fading, etc.) and the change of the business load, the amplitude and power of the received signal will change greatly dynamically. For the signal quantization distortion caused by such a signal with a large dynamic range, automatic gain control (Automatic gain control, AGC) technology is generally used to solve it. Without increasing the word length of the Analog to Digital Converter (ADC), the signal with a large dynamic range is automatically adjusted to the dynamic range suitable for the word length of the ADC to reduce quantization distortion. Another advantage of using AGC technology is to reduce the implementation cost, adopt a smaller ADC word length, obtain sufficient quantization accuracy, and reduce the implementation complexity of the subsequent baseband circuit.
在时分双工(Time Division Duplex，TDD)系统中，用户终端(UserEquipment，UE)在载频点可以同时收到来自于基站的下行信号和来自于相邻用户的上行信号。由于上行信号和下行信号分别来自于相互独立的信号源，对于终端接收机而言，上行工作区间和下行工作区间的接收信号统计特性和功率值通常会相差很大。在UE已经和基站建立同步的情况下，UE可以通过只测量下行信号来进行AGC增益的更新。但对于UE尚未与基站建立同步的情况，UE无法区分下行信号和邻近UE发送的上行信号，AGC可能会将根据上行信号功率生成的增益值应用于下行信号。当上行信号和下行信号的功率相差很大的时候，会造成下行信号被ADC削峰(Clipping)或有效量化比特的减少。这将造成量化后同步符号的损伤，并导致同步捕获时间的增加乃至无法获得同步。In a Time Division Duplex (TDD) system, a user terminal (User Equipment, UE) can simultaneously receive a downlink signal from a base station and an uplink signal from a neighboring user at a carrier frequency point. Since the uplink signal and the downlink signal come from independent signal sources, for the terminal receiver, the statistical characteristics and power values of the received signal in the uplink working interval and the downlink working interval usually differ greatly. When the UE has established synchronization with the base station, the UE can update the AGC gain by only measuring the downlink signal. However, when the UE has not established synchronization with the base station, the UE cannot distinguish the downlink signal from the uplink signal sent by the neighboring UE, and the AGC may apply the gain value generated according to the power of the uplink signal to the downlink signal. When the power of the uplink signal and the downlink signal are very different, the downlink signal will be clipped by the ADC or the effective quantization bits will be reduced. This will cause damage to the sync symbol after quantization, and lead to an increase in sync acquisition time or even failure to acquire sync.
发明内容Contents of the invention
在下文中给出关于本发明的简要概述，以便提供关于本发明的某些方面的基本理解。应当理解，这个概述并不是关于本发明的穷举性概述。它并不是意图确定本发明的关键或重要部分，也不是意图限定本发明的范围。其目的仅仅是以简化的形式给出某些概念，以此作为稍后论述的更详细描述的前序。A brief overview of the invention is given below in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical parts of the invention nor to delineate the scope of the invention. Its purpose is merely to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.
根据本发明的一个方面，一种无线通信终端包括：自动增益控制单元，被配置为对无线通信终端的接收信号进行自动增益控制；以及模式控制单元，被配置为根据无线通信终端的状态来设置自动增益控制单元的模式，其中，无线通信终端的状态包括未获取帧定时的状态和已获取帧定时的状态，自动增益控制单元的模式包括高速模式和低速模式，自动增益控制单元在高速模式下的增益值调整周期小于在低速模式下的增益值调整周期，模式控制单元在无线通信终端进入未获取帧定时的状态时将自动增益控制单元的模式设置为高速模式，在无线通信终端进入已获取帧定时的状态时将自动增益控制单元的模式设置为低速模式，其中已获取帧定时的状态包括已获取帧定时未获取帧配置的状态和已获取帧定时和帧配置的状态，并且其中在自动增益控制单元处于低速模式时且无线通信终端处于已获取帧定时未获取帧配置的状态时，自动增益控制单元只在每个半帧的第一子帧重新生成增益值。According to an aspect of the present invention, a wireless communication terminal includes: an automatic gain control unit configured to perform automatic gain control on a received signal of the wireless communication terminal; and a mode control unit configured to set the The mode of the automatic gain control unit, wherein the state of the wireless communication terminal includes the state of not acquiring frame timing and the state of acquiring frame timing, the mode of the automatic gain control unit includes a high-speed mode and a low-speed mode, and the automatic gain control unit is in the high-speed mode The gain value adjustment period of the automatic gain control unit is set to a high-speed mode when the wireless communication terminal enters a state where the frame timing is not acquired, and the mode control unit is set to a high-speed mode when the wireless communication terminal enters the obtained frame timing. When the state of frame timing is set, the mode of the automatic gain control unit is set to low-speed mode, and the state of having obtained frame timing includes the state of obtaining frame timing and not obtaining frame configuration and the state of obtaining frame timing and frame configuration, and among them, in automatic When the gain control unit is in the low speed mode and the wireless communication terminal is in a state where the frame timing has been acquired but the frame configuration has not been acquired, the automatic gain control unit only regenerates the gain value in the first subframe of each half frame.
根据本发明的另一方面，一种无线通信终端包括：自动增益控制单元，被配置为对无线通信终端的接收信号进行自动增益控制；以及模式控制单元，被配置为根据无线通信终端的状态来设置自动增益控制单元的模式，其中，无线通信终端的状态包括未获取帧定时的状态和已获取帧定时的状态，自动增益控制单元的模式包括高速模式和低速模式，自动增益控制单元在高速模式下的增益值调整周期小于在低速模式下的增益值调整周期，模式控制单元在无线通信终端进入未获取帧定时的状态时将自动增益控制单元的模式设置为高速模式，在无线通信终端进入已获取帧定时的状态时将自动增益控制单元的模式设置为低速模式，其中已获取帧定时的状态包括已获取帧定时未获取帧配置的状态和已获取帧定时和帧配置的状态，并且其中在自动增益控制单元处于低速模式时且无线通信终端处于已获取帧定时和帧配置的状态时，自动增益控制单元只在下行子帧重新生成增益值。According to another aspect of the present invention, a wireless communication terminal includes: an automatic gain control unit configured to perform automatic gain control on a received signal of the wireless communication terminal; and a mode control unit configured to perform automatic gain control according to the state of the wireless communication terminal Set the mode of the automatic gain control unit, wherein, the state of the wireless communication terminal includes the state of not acquiring the frame timing and the state of the acquired frame timing, the mode of the automatic gain control unit includes a high-speed mode and a low-speed mode, and the automatic gain control unit is in the high-speed mode The gain value adjustment cycle under the low-speed mode is less than the gain value adjustment cycle in the low-speed mode, and the mode control unit sets the mode of the automatic gain control unit to a high-speed mode when the wireless communication terminal enters a state where the frame timing has not been obtained, and when the wireless communication terminal enters the state of already When obtaining the state of frame timing, set the mode of the automatic gain control unit to low-speed mode, wherein the state of frame timing has been obtained, including the state of frame timing without frame configuration and the state of frame timing and frame configuration, and among them When the automatic gain control unit is in the low speed mode and the wireless communication terminal is in the state of having acquired frame timing and frame configuration, the automatic gain control unit only regenerates the gain value in the downlink subframe.
本发明能够有效地实现时分双工无线通信系统中的自动增益控制。The invention can effectively realize the automatic gain control in the time division duplex wireless communication system.
附图说明Description of drawings
参照下面结合附图对本发明实施例的说明，会更加容易地理解本发明的以上和其它目的、特点和优点。附图中的部件只是为了示出本发明的原理。在附图中，相同的或类似的技术特征或部件将采用相同或类似的附图标记来表示。The above and other objects, features and advantages of the present invention will be more easily understood with reference to the following description of the embodiments of the present invention in conjunction with the accompanying drawings. The components in the drawings are only to illustrate the principles of the invention. In the drawings, the same or similar technical features or components will be denoted by the same or similar reference numerals.
图1示出了TD-LTE系统的帧结构；Fig. 1 shows the frame structure of TD-LTE system;
图2示出了TD-LTE系统的帧结构中参考信号的位置；Fig. 2 shows the position of the reference signal in the frame structure of TD-LTE system;
图3示出了根据本公开的一个实施例的无线通信终端；Fig. 3 shows a wireless communication terminal according to an embodiment of the present disclosure;
图4示出了根据本公开的一个实施例的无线通信终端中的自动增益控制单元；FIG. 4 shows an automatic gain control unit in a wireless communication terminal according to an embodiment of the present disclosure;
图5示出了根据本公开的一个实施例的无线通信终端中的增益生成器；FIG. 5 shows a gain generator in a wireless communication terminal according to an embodiment of the present disclosure;
图6示出了根据本公开的实施例的高速模式的一种实现方式；FIG. 6 shows an implementation of a high-speed mode according to an embodiment of the present disclosure;
图7示出了根据本公开的实施例的高速模式的另一种实现方式；FIG. 7 shows another implementation of the high-speed mode according to an embodiment of the present disclosure;
图8示出了根据本公开的实施例的低速模式的前一阶段下自动增益控制的操作；FIG. 8 illustrates the operation of the automatic gain control in the previous stage of the low-speed mode according to an embodiment of the present disclosure;
图9示出了根据本公开的实施例的低速模式的后一阶段下自动增益控制的操作；以及FIG. 9 shows the operation of the automatic gain control in the latter stage of the low speed mode according to an embodiment of the present disclosure; and
图10示出了根据本公开的实施例的用于无线通信终端的自动增益控制方法。FIG. 10 shows an automatic gain control method for a wireless communication terminal according to an embodiment of the present disclosure.
具体实施方式Detailed ways
下面参照附图来说明本发明的实施例。在本发明的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。应当注意，为了清楚的目的，附图和说明中省略了与本发明无关的、本领域普通技术人员已知的部件和处理的表示和描述。Embodiments of the present invention will be described below with reference to the drawings. Elements and features described in one drawing or one embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that representation and description of components and processes that are not related to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions for the purpose of clarity.
以下的部分内容以3GPP的LTE(长期演进)TDD系统(TD-LTE系统)作为TDD系统的示例，但是应该理解，本发明不限于TD-LTE系统。Part of the content below takes 3GPP's LTE (Long Term Evolution) TDD system (TD-LTE system) as an example of a TDD system, but it should be understood that the present invention is not limited to the TD-LTE system.
图1示出了TD-LTE系统的帧结构示意图。TD-LTE系统中包括三种子帧结构：上行子帧(subframe)、下行子帧和特殊子帧。在图1中子帧#0、#3、#4为下行子帧，子帧#2为上行子帧，子帧#1为特殊子帧。下面叙述中，用“D”标识下行子帧，“U”标识上行子帧，“S”标识特殊子帧，“X”标识当前子帧类型未知。每一个子帧包含两个长度为0.5ms的时隙(slot)。特殊子帧由DwPTS，GP，和UpPTS组成。主同步符号(Primarysynchronization symbol，PSS)位于DwPTS的第三个符号，而辅同步符号(Secondary synchronization symbol，SSS)位于第一个子帧(SF#0)的最后一个符号，如图1所示。小区搜索就是利用对这两个同步符号的检测来获得帧定时和小区ID的。FIG. 1 shows a schematic diagram of a frame structure of a TD-LTE system. The TD-LTE system includes three subframe structures: uplink subframe, downlink subframe and special subframe. In FIG. 1, subframes #0, #3, and #4 are downlink subframes, subframe #2 is an uplink subframe, and subframe #1 is a special subframe. In the following description, "D" is used to indicate a downlink subframe, "U" is used to indicate an uplink subframe, "S" is used to indicate a special subframe, and "X" is used to indicate that the type of the current subframe is unknown. Each subframe includes two time slots (slots) with a length of 0.5ms. A special subframe consists of DwPTS, GP, and UpPTS. The primary synchronization symbol (Primary synchronization symbol, PSS) is located in the third symbol of DwPTS, and the secondary synchronization symbol (Secondary synchronization symbol, SSS) is located in the last symbol of the first subframe (SF#0), as shown in Figure 1. Cell search uses the detection of these two synchronization symbols to obtain frame timing and cell ID.
表1示出了TD-LTE系统中的几种帧配置。Table 1 shows several frame configurations in the TD-LTE system.
表1TD-LTE系统中的帧配置Table 1 Frame configuration in TD-LTE system
图2示出了TD-LTE系统的帧结构中参考信号的位置。在图2中，标记为R0的位置是port0的参考信号位置，阴影的位置是port1的参考信号位置。如图-2所示，参考信号位于slot中的#0，#4符号。在下行信号中，无论有无数据传输，参考信号都将发送。Fig. 2 shows the position of the reference signal in the frame structure of the TD-LTE system. In FIG. 2, the position marked R0 is the reference signal position of port0, and the shaded position is the reference signal position of port1. As shown in Figure-2, the reference signal is located at the #0 and #4 symbols in the slot. In the downlink signal, the reference signal will be sent whether there is data transmission or not.
图3示出了根据本公开的一个实施例的无线通信终端300。FIG. 3 shows a wireless communication terminal 300 according to one embodiment of the present disclosure.
无线通信终端300包括模式控制单元302和自动增益控制单元304。自动增益控制单元304被配置为对无线通信终端300的接收信号进行自动增益控制。模式控制单元302被配置为根据无线通信终端300的状态来设置自动增益控制单元304的模式。无线通信终端300的状态包括未获取帧定时的状态和已获取帧定时的状态。自动增益控制单元304的模式包括高速模式和低速模式。自动增益控制单元304在高速模式下的增益值调整周期小于在低速模式下的增益值调整周期。模式控制单元302在无线通信终端300进入未获取帧定时的状态时将自动增益控制单元304的模式设置为高速模式，在无线通信终端300进入已获取帧定时的状态时将自动增益控制单元304的模式设置为低速模式。在一个示例中，自动增益控制单元在高速模式下的增益值调整周期小于等于一个子帧长度，而在低速模式下的增益值调整周期大于一个子帧长度。The wireless communication terminal 300 includes a mode control unit 302 and an automatic gain control unit 304 . The automatic gain control unit 304 is configured to perform automatic gain control on the received signal of the wireless communication terminal 300 . The mode control unit 302 is configured to set the mode of the automatic gain control unit 304 according to the state of the wireless communication terminal 300 . The state of wireless communication terminal 300 includes a state where frame timing has not been acquired and a state where frame timing has been acquired. The modes of the automatic gain control unit 304 include a high-speed mode and a low-speed mode. The gain adjustment period of the automatic gain control unit 304 in the high-speed mode is smaller than the gain adjustment period in the low-speed mode. The mode control unit 302 sets the mode of the automatic gain control unit 304 to a high-speed mode when the wireless communication terminal 300 enters a state where the frame timing is not acquired, and sets the automatic gain control unit 304 to a high-speed mode when the wireless communication terminal 300 enters a state where the frame timing has been acquired. Mode is set to low speed mode. In an example, the gain adjustment period of the automatic gain control unit in the high speed mode is less than or equal to one subframe length, while the gain adjustment period in the low speed mode is longer than one subframe length.
例如，3GPP的LTE TDD系统中的无线通信终端具有未获取帧定时的状态和已获取帧定时的状态。已经获取帧定时的状态又可以分为已获取帧定时未获取帧配置的状态和已获取帧定时和帧配置的状态。对于处于不同接收状态的无线通信终端，其信号接收的目的是不同的。在未获取帧定时的状态，接收信号的目的是帧定时的捕获和终端与基站间载波频偏的矫正；在已获取帧定时未获取帧配置的状态，接收信号的目的是获取系统控制信息；在已获取帧定时和帧配置的状态，接收信号的目的是数据恢复。For example, a wireless communication terminal in the LTE TDD system of 3GPP has a state of not acquiring frame timing and a state of acquiring frame timing. The state that the frame timing has been obtained can be further divided into the state that the frame timing has been obtained but not the frame configuration, and the state that the frame timing and frame configuration have been obtained. For wireless communication terminals in different receiving states, the purposes of receiving signals are different. In the state where the frame timing is not obtained, the purpose of receiving the signal is to capture the frame timing and correct the carrier frequency offset between the terminal and the base station; in the state where the frame configuration has not been obtained at the frame timing, the purpose of receiving the signal is to obtain system control information; In the state where the frame timing and frame configuration have been acquired, the purpose of receiving the signal is data recovery.
在本实施例中，根据接收状态的不同，信号接收指标的不同，模式控制单元302将自动增益控制单元304调整到不同的模式，保证了无线通信终端300在各个工作状态下必要的量化信号的精度。In this embodiment, according to different receiving states and different signal receiving indicators, the mode control unit 302 adjusts the automatic gain control unit 304 to different modes, so as to ensure that the wireless communication terminal 300 can obtain the quantized signal necessary for each working state. precision.
图4示出了根据本公开的一个实施例的无线通信终端中的自动增益控制单元400。Fig. 4 shows an automatic gain control unit 400 in a wireless communication terminal according to an embodiment of the present disclosure.
自动增益控制单元400包括增益生成器406，被配置为生成增益值；可变增益放大器402，被配置为根据增益生成器406生成的增益值来调整接收信号的幅度并输出调整后的信号；以及模数变换器404，被配置为将从可变增益放大器402输出的信号变换为数字信号。The automatic gain control unit 400 includes a gain generator 406 configured to generate a gain value; a variable gain amplifier 402 configured to adjust the amplitude of the received signal according to the gain value generated by the gain generator 406 and output the adjusted signal; and The analog-to-digital converter 404 is configured to convert the signal output from the variable gain amplifier 402 into a digital signal.
增益生成器406可以通过测量某一个时间段接收信号(通过ADC后的信号)的功率，与参考功率相比较，按照一定的算法来生成增益值(gain)，然后传递给可变增益放大器402来调整下一个时间段接收到的模拟信号的幅度。The gain generator 406 can measure the power of the received signal (signal after passing through the ADC) in a certain period of time, compare it with the reference power, generate a gain value (gain) according to a certain algorithm, and then pass it to the variable gain amplifier 402 to Adjusts the amplitude of the analog signal received for the next time period.
图5示出了根据本公开的一个实施例的无线通信终端中的增益生成器500。FIG. 5 shows a gain generator 500 in a wireless communication terminal according to an embodiment of the present disclosure.
增益生成器500包括功率测量模块502，被配置为测量接收信号的功率；功率比较模块504，被配置为将测量的接收信号的功率与目标功率比较以确定功率调整量；以及平均模块504，被配置为将确定的当前的功率调整量与先前的功率调整量加权平均。The gain generator 500 includes a power measurement module 502 configured to measure the power of the received signal; a power comparison module 504 configured to compare the measured power of the received signal with a target power to determine a power adjustment; and an averaging module 504 configured to It is configured to perform a weighted average of the determined current power adjustment amount and the previous power adjustment amount.
下面以一个更具体的示例介绍增益生成器500的各个模块的操作。The operation of each module of the gain generator 500 is introduced below with a more specific example.
在一个示例中，功率测量模块502对于接收信号r(i)，测量Nmeasure个样点区间内的平均功率。Nmeasure个样点对应的时间长度Tmeas与TDD-LTE系统中使用Norma1 CP的符号长度相当，14个Tmeas的长度为一个子帧长度1ms。所求平均功率即为：In an example, the power measurement module 502 measures the average power in the interval of Nmeasure samples for the received signal r(i). The time length Tmeas corresponding to Nmeasure samples is equivalent to the symbol length using the Norma1 CP in the TDD-LTE system, and the length of 14 Tmeas is a subframe length of 1 ms. The average power required is:
Kset为大于或等于1的整数。Kset is an integer greater than or equal to 1.
以上采用平均功率作为信号强度度量，本发明不限于此，也可以采用平均幅度作为信号强度度量。The average power is used as the signal strength measure above, but the present invention is not limited thereto, and the average amplitude may also be used as the signal strength measure.
然后，从Kset个测得功率中取最大值，Then, taking the maximum value from the Kset measured powers,
Pest_max=max(Pest(0)，Pest(1)，...，Pest(Kset-1))Pest_max = max(Pest (0), Pest (1), ..., Pest (Kset -1))
可选地，经过对数变换，可得：PdB=10log10(Pest_max)[dB]Optionally, after logarithmic transformation, it can be obtained: PdB =10log10 (Pest_max )[dB]
以上采用Kset个测得功率中的最大值作为测量的功率，本发明不限于此，也可以采用Kset个测得功率的平均值作为测量的功率。Above, the maximum value among the Kset measured powers is used as the measured power, but the present invention is not limited thereto, and the average value of the Kset measured powers may also be used as the measured power.
功率比较模块504，将测量的接收信号的功率与目标功率比较以确定功率调整量。目标功率可以由模数变换器的最大量化功率与裕度值(Headroom)之差来确定。模数变换器的最大量化功率由ADC的字长确定。假设ADC的字长Nbit，裕度值为PHR[dB]The power comparison module 504 compares the measured power of the received signal with the target power to determine a power adjustment amount. The target power can be determined by the difference between the maximum quantization power of the analog-to-digital converter and the headroom value (Headroom). The maximum quantization power of the analog-to-digital converter is determined by the word length of the ADC. Assuming that the word length of the ADC is Nbit , the margin value is PHR [dB]
Ptar=10log10(2×(2Nbit-1-1)2)-PHR[dB]Ptar =10log10 (2×(2Nbit-1 -1)2 )-PHR [dB]
其中的PHR可以根据不同的自动增益控制单元的不同模式而设置，也可以根据信号被ADC消峰的程度而设定。The PHR can be set according to different modes of different automatic gain control units, and can also be set according to the degree of peak elimination of the signal by the ADC.
然后则可计算得到目标功率和测得功率的差ΔPThen the difference ΔP between the target power and the measured power can be calculated
ΔP=Ptar-PdB[dB]ΔP=Ptar -PdB [dB]
第j个测量区间的功率差ΔP(也就是功率调整量)可以写为：The power difference ΔP (that is, the power adjustment amount) of the jth measurement interval can be written as:
ΔP(j)=Ptar(j)-PdB(j)ΔP(j)=Ptar (j)-PdB (j)
平均单元506可以利用如下的公式将当前的功率调整量和前几次调整量加权平均：The averaging unit 506 can use the following formula to weight the current power adjustment amount and the previous several adjustment amounts:
其中，假设α为遗忘因子，对于不同的自动增益控制单元的模式，遗忘因子0＜=α＜=1。Among them, suppose α is a forgetting factor, and for different automatic gain control unit modes, the forgetting factor 0<=α<=1.
则最终增益值更新为Then the final gain value is updated as
下面介绍在不同模式下自动增益控制单元的操作。The operation of the automatic gain control unit in different modes is described below.
在一个实施例中，当无线通信终端没有捕获到定时信息时(例如，无线通信终端在进行载波搜索、初始小区搜索或者从睡眠模式恢复到Active模式(活动模式))，模式控制单元将自动增益控制单元设置为高速模式，在高速模式中增益值的测量和调整周期很短，例如可以小于一个子帧长度。在小区搜索完成后，进入低速模式的前一阶段，这时终端只知道帧定时信息但不知道帧的上下行配置信息，只能利用固定的下行子帧进行AGC测量。当上下行配置信息被检出后，进入低速模式的后一阶段，可以利用所有的下行子帧进行AGC测量。In one embodiment, when the wireless communication terminal does not capture timing information (for example, the wireless communication terminal is performing carrier search, initial cell search, or recovering from sleep mode to Active mode (active mode)), the mode control unit will automatically gain The control unit is set to a high-speed mode, and the measurement and adjustment period of the gain value in the high-speed mode is very short, for example, may be less than a subframe length. After the cell search is completed, it enters the previous stage of the low-speed mode. At this time, the terminal only knows the frame timing information but does not know the uplink and downlink configuration information of the frame, and can only use fixed downlink subframes for AGC measurement. After the uplink and downlink configuration information is detected, the next stage of the low-speed mode is entered, and all downlink subframes can be used for AGC measurement.
1.高速模式1. High speed mode
根据表1所示的帧结构，特殊子帧前的一个子帧必然是下行子帧。通过在该子帧及特殊子帧中的DwPTS里的调整，使增益值收敛到适合于同步符号的增益值。According to the frame structure shown in Table 1, a subframe before the special subframe must be a downlink subframe. Through the adjustment in the subframe and the DwPTS in the special subframe, the gain value converges to a gain value suitable for the synchronization symbol.
图6示出了根据本发明的实施例的高速模式的一种实现方式。在图6中。TmeasKset为测量(Measure)时间，Tapply是增益值计算、增益值反馈到VGA，VGA根据增益值做出调整并至稳定所需要的处理时延，由器件水平决定。通常，Tapply较之TmeasKset小得多，甚至可以忽略。Fig. 6 shows an implementation of the high-speed mode according to an embodiment of the present invention. In Figure 6. Tmeas Kset is the measurement (Measure) time, Tapply is the calculation of the gain value, the gain value is fed back to the VGA, and the processing delay required by the VGA to adjust the gain value and reach stability is determined by the device level. Usually, Tapply is much smaller than Tmeas Kset , and can even be ignored.
在高速模式的起始，例如当终端开机后，先通过数次测量调整(warm up)，将接收信号的水平调整到ADC工作范围之内。调整的次数可根据ADC动态范围和接收信号的动态范围设定。例如，对于12bit ADC，72dB动态范围的信号，为了保证从一个随机设定的增益值收敛到一个可用的增益值，初始阶段进行3-5次增益值调整。之后，无线通信终端开始进行小区搜索。为了保证AGC能够追踪信号功率的变化，遗忘因子α可以取值为1，也就是说，平均模块中的先前的功率调整量的权重可以设置为零。另外，为了保证信号尽量不被削峰，并有一个合理的动态范围，PHR取值为9-36dB，更优选地，选择为约18～27dB。为了保证在PSS/SSS符号前有四次左右的增益值调整，则Kset值越小越好，但是考虑到Kset的设定不应该小于即参考信号之间的最大时间间隔以免测到的完全的空符号，参照图2，可以将Kset取值为4-5。也就是说将功率测量模块的测量周期为接收信号中的参考信号的最大时域间隔或者比接收信号中的参考信号的最大时域间隔大一个符号长度。如图6所示，各个测量周期互不重叠，并且自动增益控制单元的增益值调整周期(G0，G1，...)等于功率测量模块的测量周期。在一个实施例中，自动增益控制单元的增益值调整周期可以大于功率测量模块的测量周期。At the beginning of the high-speed mode, for example, after the terminal is turned on, the level of the received signal is adjusted to be within the working range of the ADC through several measurements and adjustments (warm up). The number of adjustments can be set according to the dynamic range of the ADC and the dynamic range of the received signal. For example, for a signal with a 12bit ADC and a 72dB dynamic range, in order to ensure that a randomly set gain value converges to an available gain value, 3-5 gain value adjustments are performed in the initial stage. After that, the wireless communication terminal starts cell search. In order to ensure that the AGC can track the change of signal power, the forgetting factor α can take a value of 1, that is, the weight of the previous power adjustment in the averaging module can be set to zero. In addition, in order to ensure that the signal is not clipped as much as possible and has a reasonable dynamic range, the value of PHR is 9-36dB, and more preferably, it is selected to be about 18-27dB. In order to ensure that there are about four gain adjustments before the PSS/SSS symbol, the smaller the value ofKset , the better, but considering that the setting of Kset should not be smaller than the maximum time interval between reference signals to avoid completely detected The empty symbol of , referring to FIG. 2 , can set the value of Kset to 4-5. That is to say, the measurement period of the power measurement module is set to the maximum time domain interval of the reference signal in the received signal or one symbol length longer than the maximum time domain interval of the reference signal in the received signal. As shown in FIG. 6 , the measurement periods do not overlap with each other, and the gain adjustment period (G0, G1, . . . ) of the automatic gain control unit is equal to the measurement period of the power measurement module. In one embodiment, the gain adjustment period of the automatic gain control unit may be greater than the measurement period of the power measurement module.
另外，为了防止上下行间隔GP对AGC的影响，可以在固定PHR的基础上增加一个裕度值偏移值。从而目标功率可以表示为：In addition, in order to prevent the impact of the uplink and downlink interval GP on the AGC, a margin value offset value can be added on the basis of the fixed PHR . Thus the target power can be expressed as:
Ptar=10log10(2×(2Nbit-1)2)-PHR-PoffsetPtar =10log10 (2×(2Nbit -1)2 )-PHR -Poffset
其中的Poffset＞=0，由信号被消峰的比例确定，消峰越多则Poffset越大。例如，可以利用ADC的overflow(溢出)输出机制来求出裕度值偏移值。具体地，可以统计对应高速模式测量区间Tmeas·Kset内overflow的样点数目与总样点数目的比值。可以采用固定门限值的方法，当该比值超过10％，Poffset=3dB；比值超过20％，Poffset=6dB。如果ADC不具有overflow输出功能，可采用满量程输出的样点数与总样点数的比值来代替。Among them, Poffset >=0, which is determined by the proportion of the signal being clipped, and the more clipped, the larger the Poffset . For example, the overflow (overflow) output mechanism of the ADC can be used to find the offset value of the margin value. Specifically, the ratio of the number of overflow samples in the corresponding high-speed mode measurement interval Tmeas ·Kset to the total number of samples may be counted. A method of fixing the threshold value may be adopted, when the ratio exceeds 10%, Poffset =3dB; when the ratio exceeds 20%, Poffset =6dB. If the ADC does not have an overflow output function, the ratio of the number of samples of the full-scale output to the total number of samples can be used instead.
图7示出了根据本发明的实施例的高速模式的另一种实现方式。与图6的不同点是各个测量周期(Measure)互相重叠，自动增益控制单元的增益值调整周期(G0，G1，...)小、于功率测量模块的测量周期，调整周期为1-2个Tmeas，另外在该图7中忽略Tapply。在图7中，增益值的收敛速度比图6中的更快。Fig. 7 shows another implementation of the high-speed mode according to an embodiment of the present invention. The difference from Figure 6 is that each measurement period (Measure) overlaps with each other, and the gain value adjustment period (G0, G1, ...) of the automatic gain control unit is smaller than the measurement period of the power measurement module, and the adjustment period is 1-2 Tmeas , and Tapply is ignored in this figure 7 . In Figure 7, the gain values converge faster than in Figure 6.
2.低速模式2. Low speed mode
图8示出了根据本公开的实施例的低速模式的前一阶段下自动增益控制的操作。在低速模式的前一阶段，也就是终端处于已获取帧定时未获取帧配置的状态时，AGC会在每半帧的第一个子帧进行低速的增益值的测量和更新，该阶段会持续到终端获得上下行配置信息为止。在该阶段，继续同步跟踪和系统配置检测单元，进行PBCH，PCFICH，PDCCH检测，并在PDSCH的SIB(systeminformation block)中获得TD-LTE帧结构的上下行配置信息。FIG. 8 illustrates the operation of the automatic gain control in the previous stage of the low speed mode according to an embodiment of the present disclosure. In the previous stage of the low-speed mode, that is, when the terminal is in the state where the frame timing has been obtained but the frame configuration has not been obtained, the AGC will measure and update the low-speed gain value in the first subframe of each half frame, and this stage will continue until the terminal obtains the uplink and downlink configuration information. At this stage, continue the synchronization tracking and system configuration detection unit to perform PBCH, PCFICH, PDCCH detection, and obtain the uplink and downlink configuration information of the TD-LTE frame structure in the SIB (system information block) of the PDSCH.
在低速模式的前一阶段，根据终端是否获得帧的上下行配置来决定是进入下一阶段。在低速模式的前一阶段，只测量下行信号，信号功率的变化主要受快衰影响，不会变化太剧烈。由于在低速模式的前一阶段有可能做一些与检测测量相关的工作，为了保证增益值的稳定性，则遗忘因子α取值为0.1～0.5，也就是说，平均模块中的先前的功率调整量的权重与当前的功率调整量的权重之比为1～9。Kset为14，也就是功率测量模块的测量周期为一个子帧，PHR取值为9-36dB，更优选地为约18～27dB。In the previous stage of the low-speed mode, it is determined whether to enter the next stage according to whether the terminal obtains the uplink and downlink configuration of the frame. In the previous stage of low-speed mode, only the downlink signal is measured, and the change of signal power is mainly affected by fast fading, and the change will not be too drastic. Since it is possible to do some work related to detection and measurement in the previous stage of the low-speed mode, in order to ensure the stability of the gain value, the value of the forgetting factor α is 0.1~0.5, that is, the previous power adjustment in the average module The ratio of the weight of the amount to the weight of the current power adjustment amount is 1-9. Kset is 14, that is, the measurement period of the power measurement module is one subframe, and the value of PHR is 9-36dB, more preferably about 18-27dB.
图9给出了根据本公开的实施例的低速模式的后一阶段下自动控制的操作。在获得帧的上下行配置后，进入低速模式的后一阶段。在低速模式的后一阶段，AGC单元只利用下行子帧进行AGC更新。对于特殊子帧，采用保持(hold)操作，即此时不进行增益值测量和更新。遇到上行子帧，存储当前的AGC增益值，在上行子帧期间不进行任何操作(stop)，当再次遇到下行子帧，恢复(restore)之前的AGC存储值用于信号接收。针对不同的上下行配置，增益值的更新和测量流程也相应调整。在低速模式的后一阶段，为了保证增益值的稳定性，则遗忘因子α取值为0.1～0.5，也就是说，平均模块中的先前的功率调整量的权重与当前的功率调整量的权重之比为1～9。Kset为14，也就是功率测量模块的测量周期为一个子帧，PHR取值为9-36dB，更优选地为约18～27dB。FIG. 9 shows the operation of the automatic control in the latter stage of the low speed mode according to an embodiment of the present disclosure. After obtaining the uplink and downlink configuration of the frame, it enters the next stage of the low-speed mode. In the latter stage of the low-speed mode, the AGC unit only uses downlink subframes to update the AGC. For a special subframe, a hold operation is adopted, that is, gain value measurement and update are not performed at this time. When encountering an uplink subframe, store the current AGC gain value, do not perform any operation (stop) during the uplink subframe, and restore (restore) the previous AGC storage value for signal reception when encountering a downlink subframe again. For different uplink and downlink configurations, the update and measurement procedures of the gain value are also adjusted accordingly. In the latter stage of the low-speed mode, in order to ensure the stability of the gain value, the value of the forgetting factor α ranges from 0.1 to 0.5, that is, the weight of the previous power adjustment in the averaging module and the weight of the current power adjustment The ratio is 1-9. Kset is 14, that is, the measurement period of the power measurement module is one subframe, and the value of PHR is 9-36dB, more preferably about 18-27dB.
在一个实施例中，在低速模式的前一阶段之前，还可以存在一个过渡阶段。存在过渡阶段的目的是，由于高速模式下所获得的增益值距离理想的对应下行信号的增益可能还有距离，因而增加这一阶段使增益值进一步收敛稳定。In one embodiment, there may also be a transition phase before the previous phase of the low speed mode. The purpose of the transition stage is to add this stage to further stabilize the gain value because the gain value obtained in the high-speed mode may still be far from the ideal gain corresponding to the downlink signal.
在一个示例中，对应于成功小区搜索的搜索区间，将该区间内所有进行AGC更新的增益值进行存储(其中包括对应SSS检测成功区间的AGC增益值)，在后续的低速模式的前一阶段中，使用对应SSS成功检测的AGC增益作为该模式下AGC的初始值。In one example, corresponding to the search interval of a successful cell search, all the gain values for AGC update in the interval are stored (including the AGC gain value corresponding to the successful interval of SSS detection), and in the previous stage of the subsequent low-speed mode In , the AGC gain corresponding to the successful detection of SSS is used as the initial value of AGC in this mode.
在另一个示例中，对应于成功小区搜索的搜索区间，将该区间内最后一次AGC更新的增益值进行存储。在后续的低速模式的前一阶段中中作为AGC的初始值。在获得同步定时后，利用已知的固定下行子帧0和5，进行高速的增益值的测量和更新，该阶段可以持续1-2个半帧。同时，进行同步跟踪，通过定时和频率跟踪来提高同步精度。其中，过渡状态持续的时间为5～10ms(通过1-2个半帧的调节使增益值收敛到下行信号对应的增益值)。对于过渡状态，遗忘因子α取值为1，Kset为4-5，PHR取值为9-36dB，优选地为约18～27dB。在固定下行子帧之后，保持(hold)最后一次AGC增益值。可以看出，在该过渡阶段中，在固定的下行子帧，采用与高速模式下相同的工作参数进行自动增益控制。In another example, corresponding to the search interval of successful cell search, the gain value of the last AGC update in the interval is stored. It is used as the initial value of AGC in the preceding stage of the subsequent low-speed mode. After the synchronization timing is obtained, the known fixed downlink subframes 0 and 5 are used to perform high-speed measurement and update of the gain value, and this stage may last for 1-2 half-frames. At the same time, carry out synchronous tracking, and improve the synchronization accuracy through timing and frequency tracking. Wherein, the duration of the transition state is 5-10 ms (the gain value converges to the gain value corresponding to the downlink signal through the adjustment of 1-2 field frames). For the transition state, the forgetting factor α is 1, Kset is 4-5, and PHR is 9-36dB, preferably about 18-27dB. After fixing the downlink subframe, keep (hold) the last AGC gain value. It can be seen that in this transition stage, in the fixed downlink subframe, the automatic gain control is performed using the same working parameters as in the high-speed mode.
在一个实施例中，自动增益控制单元在各个模式下的工作参数，例如遗忘因子α，Kset，PHR等可以由模式控制单元设置。在另一个实施例中，模式控制单元仅设置自动增益控制单元的模式和/或模式中的阶段，各个工作模式下的参数可以预先设置在自动增益控制单元中。In an embodiment, the working parameters of the automatic gain control unit in each mode, such as forgetting factor α, Kset , PHR , etc., can be set by the mode control unit. In another embodiment, the mode control unit only sets the mode and/or the phase in the mode of the automatic gain control unit, and the parameters in each working mode can be preset in the automatic gain control unit.
图10示出了根据本公开的实施例的用于无线通信终端的自动增益控制方法。FIG. 10 shows an automatic gain control method for a wireless communication terminal according to an embodiment of the present disclosure.
在步骤1002中，根据无线通信终端的状态来设置自动增益控制操作的模式。在步骤1004中，按照设置的自动增益控制的模式对无线通信终端的接收信号进行自动增益控制操作。无线通信终端的状态包括未获取帧定时的状态和已获取帧定时的状态，自动增益控制操作的模式包括高速模式和低速模式，在高速模式下增益值调整周期小于在低速模式下的增益值调整周期，在无线通信终端进入未获取帧定时的状态时将自动增益控制操作的模式设置为高速模式，在无线通信终端进入已获取帧定时的状态时将自动增益控制操作的模式设置为低速模式。In step 1002, the mode of automatic gain control operation is set according to the state of the wireless communication terminal. In step 1004, an automatic gain control operation is performed on the received signal of the wireless communication terminal according to the set automatic gain control mode. The state of the wireless communication terminal includes a state of not acquiring frame timing and a state of acquiring frame timing, and the mode of automatic gain control operation includes a high-speed mode and a low-speed mode, and the gain value adjustment period in the high-speed mode is shorter than that in the low-speed mode. Periodically, when the wireless communication terminal enters a state where the frame timing is not acquired, the automatic gain control operation mode is set to a high-speed mode, and when the wireless communication terminal enters a state where the frame timing has been acquired, the automatic gain control operation mode is set to a low-speed mode.
在一个示例中，自动增益控制操作在高速模式下的增益值调整周期小于等于一个子帧长度，而低速模式下的增益值调整周期大于一个子帧长度。In an example, the gain adjustment period of the automatic gain control operation in the high speed mode is less than or equal to one subframe length, while the gain value adjustment period in the low speed mode is longer than one subframe length.
在一个示例中，已经获取帧定时的状态包括已获取帧定时未获取帧配置的状态和已获取帧定时和帧配置的状态。In one example, the state of having acquired frame timing includes a state of having acquired frame timing but not acquiring frame configuration, and a state of having acquired frame timing and frame configuration.
在一个示例中，自动增益控制操作包括：生成增益值；根据增益值来调整接收信号的幅度；以及对调整后的信号进行模数变换以变换为数字信号。在一个示例中，生成增益值包括：测量接收信号的功率；将测量的接收信号的功率与目标功率比较以确定功率调整量；以及将确定的当前的功率调整量与先前的功率调整量加权平均。In one example, the automatic gain control operation includes: generating a gain value; adjusting the amplitude of the received signal according to the gain value; and performing analog-to-digital conversion on the adjusted signal to convert it into a digital signal. In one example, generating the gain value includes: measuring the power of the received signal; comparing the measured power of the received signal with a target power to determine a power adjustment amount; and weighting the determined current power adjustment amount and the previous power adjustment amount .
在一个示例中，自动增益控制操作为高速模式时，先前的功率调整量的权重设置为零。In one example, when the automatic gain control is operating in the high speed mode, the weight of the previous power adjustment is set to zero.
在一个示例中，目标功率可以为最大量化功率与裕度值之差，在自动增益控制操作为高速模式时，裕度值设置为9～36dB，更优选为18～27dB。In an example, the target power may be the difference between the maximum quantization power and a margin value, and when the automatic gain control operates in a high-speed mode, the margin value is set to 9-36dB, more preferably 18-27dB.
在一个示例中，目标功率为最大量化功率减去裕度值与裕度值偏移值之和，裕度值偏移值随着在模数变换中被消峰的信号的比例的增大而增大，在自动增益控制操作为高速模式时，裕度值设置为9～36dB，更优选为18～27dB。In one example, the target power is the maximum quantization power minus the sum of the margin value and the margin value offset value, the margin value offset value increases with the proportion of the clipped signal in the analog-to-digital conversion To increase, when the automatic gain control operation is in the high-speed mode, the margin value is set to 9-36dB, more preferably 18-27dB.
在一个示例中，在自动增益控制操作为高速模式时，测量接收信号的功率中的测量周期设置为接收信号中的参考信号的最大时域间隔或者比接收信号中的参考信号的最大时域间隔大一个符号长度，各个测量周期互不重叠，自动增益控制操作的增益值调整周期大于等于述测量周期。In one example, when the automatic gain control is operated in the high-speed mode, the measurement period in measuring the power of the received signal is set to the maximum time-domain interval of the reference signals in the received signal or greater than the maximum time-domain interval of the reference signals in the received signal One symbol length is longer, each measurement period does not overlap with each other, and the gain value adjustment period of the automatic gain control operation is greater than or equal to the measurement period.
在一个示例中，在自动增益控制操作为高速模式时，测量接收信号的功率中的测量周期设置为接收信号中的参考信号的最大时域间隔或者比接收信号中的参考的最大时域间隔大一个符号长度，各个测量周期互相重叠，自动增益控制操作的增益值调整周期小于测量周期。In one example, when the automatic gain control is operating in high-speed mode, the measurement period in measuring the power of the received signal is set to the maximum time-domain interval of the reference signal in the received signal or greater than the maximum time-domain interval of the reference signal in the received signal One symbol length, each measurement period overlaps with each other, and the gain value adjustment period of the automatic gain control operation is shorter than the measurement period.
在一个示例中，在自动增益控制操作为低速模式时且无线通信终端处于已获取帧定时未获取帧配置的状态时，自动增益控制操作只在每个半帧的第一子帧重新生成增益值。In one example, when the automatic gain control operation is in the low-speed mode and the wireless communication terminal is in a state where the frame timing has been acquired but the frame configuration has not been acquired, the automatic gain control operation only regenerates the gain value in the first subframe of each half frame .
在一个示例中，在自动增益控制操作为低速模式时且无线通信终端处于已获取帧定时和帧配置的状态时，自动增益控制操作只在下行子帧重新生成增益值。In one example, when the automatic gain control operation is in the low-speed mode and the wireless communication terminal is in a state of having acquired frame timing and frame configuration, the automatic gain control operation only regenerates gain values in downlink subframes.
在一个示例中，在自动增益控制操作为低速模式时，先前的功率调整量的权重与当前的功率调整量的权重之比为1～9。In one example, when the automatic gain control operates in the low speed mode, the ratio of the weight of the previous power adjustment amount to the weight of the current power adjustment amount is 1-9.
在一个示例中，目标功率为最大量化功率与裕度值之差，在自动增益控制操作为低速模式时，裕度值设置为9～36dB，更优选地为18～27dB。In one example, the target power is the difference between the maximum quantization power and the margin value, and when the automatic gain control operates in the low speed mode, the margin value is set to 9-36dB, more preferably 18-27dB.
在一个示例中，在自动增益控制操作为低速模式时，测量接收信号的功率中的测量周期设置为一个子帧。In one example, when the automatic gain control operates in the low speed mode, the measurement period in measuring the power of the received signal is set to one subframe.
在一个示例中，在自动增益控制操作为低速模式时且无线通信终端处于已获取帧定时未获取帧配置的状态时，自动增益控制操作先处于低速模式的过渡阶段，在该过渡阶段中，在固定的下行子帧，采用与高速模式下相同的工作参数进行自动增益控制。In an example, when the automatic gain control operation is in the low-speed mode and the wireless communication terminal is in a state where the frame timing has been acquired but the frame configuration has not been acquired, the automatic gain control operation is first in the transition phase of the low-speed mode, and in the transition phase, in The fixed downlink subframe adopts the same working parameters as in the high-speed mode for automatic gain control.
关于图10中的操作的具体细节可以参考结合图3-图9对无线通信终端的描述，这里不再赘述。For specific details about the operation in FIG. 10 , reference may be made to the description of the wireless communication terminal in conjunction with FIGS. 3-9 , which will not be repeated here.
在以上对于根据本公开的实施例的无线通信终端的描述中，载波搜索、小区搜索、同步跟踪以及系统配置检测等操作以及完成这些操作的相应的部件是本领域的技术人员可以实现的，这里不再详细描述。In the above description of the wireless communication terminal according to the embodiments of the present disclosure, operations such as carrier search, cell search, synchronization tracking, and system configuration detection and the corresponding components for completing these operations can be realized by those skilled in the art. No longer described in detail.
在本发明的实施例中，无线通信终端可以是手机，便携计算机，PDA，数据卡，USB棒，车载接收机，智能家电，智能仪表等任何凡是装载LTE芯片的电子设备。In the embodiment of the present invention, the wireless communication terminal can be a mobile phone, a portable computer, a PDA, a data card, a USB stick, a car receiver, a smart home appliance, a smart instrument, and any other electronic device loaded with an LTE chip.
上面对本发明的一些实施方式进行了详细的描述。如本领域的普通技术人员所能理解的，本发明的方法和装置的全部或者任何步骤或者部件，可以在任何计算设备(包括处理器、存储介质等)或者计算设备的网络中，以硬件、固件、软件或者它们的组合加以实现，这是本领域普通技术人员在了解本发明的内容的情况下运用他们的基本编程技能就能实现的，因此不需在此具体说明。Some embodiments of the present invention have been described in detail above. As can be understood by those of ordinary skill in the art, all or any steps or components of the method and apparatus of the present invention can be implemented in any computing device (including processor, storage medium, etc.) or network of computing devices in the form of hardware, It can be realized by firmware, software or their combination, which can be realized by those skilled in the art by using their basic programming skills after understanding the content of the present invention, so no specific description is needed here.
此外，显而易见的是，在上面的说明中涉及到可能的外部操作的时候，无疑要使用与任何计算设备相连的任何显示设备和任何输入设备、相应的接口和控制程序。总而言之，计算机、计算机系统或者计算机网络中的相关硬件、软件和实现本发明的前述方法中的各种操作的硬件、固件、软件或者它们的组合，即构成本发明的设备及其各组成部件。Furthermore, it is obvious that any display device and any input device connected to any computing device, corresponding interfaces and control programs are undoubtedly used when the above description refers to possible external operations. In a word, the relevant hardware, software in the computer, computer system or computer network, and the hardware, firmware, software or their combination to realize various operations in the aforementioned method of the present invention constitute the device and its component parts of the present invention.
因此，基于上述理解，本发明的目的还可以通过在任何信息处理设备上运行一个程序或者一组程序来实现。所述信息处理设备可以是公知的通用设备。因此，本发明的目的也可以仅仅通过提供包含实现所述方法或者设备的程序代码的程序产品来实现。也就是说，这样的程序产品也构成本发明，并且存储或者传输这样的程序产品的介质也构成本发明。显然，所述存储或者传输介质可以是本领域技术人员已知的，或者将来所开发出来的任何类型的存储或者传输介质，因此也没有必要在此对各种存储或者传输介质一一列举。Therefore, based on the above understanding, the object of the present invention can also be realized by running a program or a group of programs on any information processing device. The information processing device may be a known general-purpose device. Therefore, the object of the present invention can also be achieved only by providing a program product including program codes for realizing the method or device. That is, such a program product also constitutes the present invention, and a medium storing or transmitting such a program product also constitutes the present invention. Apparently, the storage or transmission medium may be any type of storage or transmission medium known to those skilled in the art or developed in the future, so it is not necessary to list all kinds of storage or transmission media here.
在本发明的设备和方法中，显然，各部件或各步骤是可以分解、组合和/或分解后重新组合的。这些分解和/或重新组合应视为本发明的等效方案。还需要指出的是，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行。某些步骤可以并行或彼此独立地执行。同时，在上面对本发明具体实施例的描述中，针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。In the device and method of the present invention, obviously, each component or each step can be decomposed, combined and/or recombined after decomposing. These decompositions and/or recombinations should be considered equivalents of the present invention. It should also be pointed out that the steps for executing the above series of processes can naturally be executed in chronological order according to the illustrated order, but it does not need to be executed in chronological order. Certain steps may be performed in parallel or independently of each other. Meanwhile, in the above descriptions of specific embodiments of the present invention, features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, and combination of features, or replace features in other embodiments.
应该强调，术语“包括/包含”在本文使用时指特征、要素、步骤或组件的存在，但并不排除一个或更多个其它特征、要素、步骤或组件的存在或附加。It should be emphasized that the term "comprising/comprising" when used herein refers to the presence of a feature, element, step or component, but does not exclude the presence or addition of one or more other features, elements, steps or components.
虽然已经详细说明了本发明及其优点，但是应当理解在不超出由所附的权利要求所限定的本发明的精神和范围的情况下可以进行各种改变、替代和变换。而且，本申请的范围不仅限于说明书所描述的过程、设备、手段、方法和步骤的具体实施例。本领域内的普通技术人员从本发明的公开内容将容易理解，根据本发明可以使用执行与在此所述的相应实施例基本相同的功能或者获得与其基本相同的结果的、现有和将来要被开发的过程、设备、手段、方法或者步骤。因此，所附的权利要求旨在在它们的范围内包括这样的过程、设备、手段、方法或者步骤。Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims. Moreover, the scope of the present application is not limited to the specific embodiments of the procedures, devices, means, methods and steps described in the specification. Those of ordinary skill in the art will readily appreciate from the disclosure of the present invention that existing and future devices that perform substantially the same function or obtain substantially the same results as the corresponding embodiments described herein can be used in accordance with the present invention. The developed process, device, means, method or steps. Accordingly, the appended claims are intended to include within their scope such processes, means, means, methods or steps.
关于包括以上各实施例的实施方式，还公开了以下的附记。The following additional notes are also disclosed regarding the embodiments including the above-described embodiments.
附记Note
1.一种无线通信终端，包括：1. A wireless communication terminal, comprising:
自动增益控制单元，被配置为对所述无线通信终端的接收信号进行自动增益控制；以及an automatic gain control unit configured to perform automatic gain control on the received signal of the wireless communication terminal; and
模式控制单元，被配置为根据所述无线通信终端的状态来设置自动增益控制单元的模式，a mode control unit configured to set the mode of the automatic gain control unit according to the state of the wireless communication terminal,
其中，所述无线通信终端的状态包括未获取帧定时的状态和已获取帧定时的状态，所述自动增益控制单元的模式包括高速模式和低速模式，所述自动增益控制单元在高速模式下的增益值调整周期小于在低速模式下的增益值调整周期，所述模式控制单元在所述无线通信终端进入未获取帧定时的状态时将所述自动增益控制单元的模式设置为高速模式，在所述无线通信终端进入已获取帧定时的状态时将所述自动增益控制单元的模式设置为低速模式。Wherein, the state of the wireless communication terminal includes a state of not acquiring frame timing and a state of acquiring frame timing, the mode of the automatic gain control unit includes a high-speed mode and a low-speed mode, and the automatic gain control unit in the high-speed mode The gain value adjustment cycle is shorter than the gain value adjustment cycle in the low-speed mode, and the mode control unit sets the mode of the automatic gain control unit to a high-speed mode when the wireless communication terminal enters a state where the frame timing is not acquired, and the When the wireless communication terminal enters the state of having acquired the frame timing, the mode of the automatic gain control unit is set to a low speed mode.
2.如附记1所述的无线通信终端，其中所述自动增益控制单元在高速模式下的增益值调整周期小于等于一个子帧长度，而在低速模式下的增益值调整周期大于一个子帧长度。2. The wireless communication terminal as described in Supplement 1, wherein the gain adjustment period of the automatic gain control unit in the high-speed mode is less than or equal to one subframe length, and the gain value adjustment period in the low-speed mode is longer than one subframe length.
3.如附记1所述的无线通信终端，其中所述已经获取帧定时的状态包括已获取帧定时未获取帧配置的状态和已获取帧定时和帧配置的状态。3. The wireless communication terminal according to Supplement 1, wherein the state of having acquired frame timing includes the state of having acquired frame timing but not of frame configuration, and the state of having acquired frame timing and frame configuration.
4.如附记3所述的无线通信终端，其中所述自动增益控制单元包括：4. The wireless communication terminal as described in Note 3, wherein the automatic gain control unit includes:
增益生成器，被配置为生成增益值；a gain generator configured to generate a gain value;
可变增益放大器，被配置为根据所述增益生成器生成的增益值来调整接收信号的幅度并输出调整后的信号；以及a variable gain amplifier configured to adjust the amplitude of the received signal according to the gain value generated by the gain generator and output the adjusted signal; and
模数变换器，被配置为将从所述可变增益放大器输出的信号变换为数字信号，an analog-to-digital converter configured to convert the signal output from the variable gain amplifier into a digital signal,
其中所述增益生成器包括：Wherein said gain generator comprises:
功率测量模块，被配置为测量接收信号的功率；a power measurement module configured to measure the power of the received signal;
功率比较模块，被配置为将测量的接收信号的功率与目标功率比较以确定功率调整量；以及a power comparison module configured to compare the measured power of the received signal with a target power to determine a power adjustment; and
平均模块，被配置为将确定的当前的功率调整量与先前的功率调整量加权平均。The averaging module is configured to perform a weighted average of the determined current power adjustment amount and the previous power adjustment amount.
5.如附记4所述的无线通信终端，其中在所述自动增益控制单元处于高速模式时，所述平均模块中的先前的功率调整量的权重设置为零。5. The wireless communication terminal according to supplementary note 4, wherein when the automatic gain control unit is in the high-speed mode, the weight of the previous power adjustment amount in the averaging module is set to zero.
6.如附记4所述的无线通信终端，其中所述目标功率为所述模数变换器的最大量化功率与裕度值之差，在所述自动增益控制单元处于高速模式时，所述裕度值设置为9～36dB。6. The wireless communication terminal as described in Note 4, wherein the target power is the difference between the maximum quantized power of the analog-to-digital converter and a margin value, and when the automatic gain control unit is in the high-speed mode, the The margin value is set to 9~36dB.
7.如附记4所述的无线通信终端，其中所述目标功率为所述模数变换器的最大量化功率减去裕度值与裕度值偏移值之和，所述裕度值偏移值随着在所述模数变换器中被消峰的信号的比例的增大而增大，在所述自动增益控制单元处于高速模式时，所述裕度值设置为9～36dB。7. The wireless communication terminal as described in Supplementary Note 4, wherein the target power is the maximum quantization power of the analog-to-digital converter minus the sum of a margin value and a margin value offset value, and the margin value deviates from The shift value increases with the increase of the proportion of the peak clipped signal in the analog-to-digital converter, and when the automatic gain control unit is in high-speed mode, the margin value is set to 9-36dB.
8.如附记6或7所述的无线通信终端，其中在所述自动增益控制单元处于高速模式时，所述裕度值设置为18～27dB。8. The wireless communication terminal according to Supplementary Note 6 or 7, wherein when the automatic gain control unit is in the high-speed mode, the margin value is set to 18-27dB.
9.如附记4所述的无线通信终端，其中在所述自动增益控制单元处于高速模式时，所述功率测量模块的测量周期设置为接收信号中的参考信号的最大时域间隔或者比接收信号中的参考信号的最大时域间隔大一个符号长度，各个测量周期互不重叠，所述自动增益控制单元的增益值调整周期大于或等于所述功率测量模块的测量周期。9. The wireless communication terminal as described in Supplementary Note 4, wherein when the automatic gain control unit is in the high-speed mode, the measurement cycle of the power measurement module is set to the maximum time-domain interval of the reference signal in the received signal or the ratio of the received signal The maximum time domain interval of the reference signal in the signal is longer than one symbol length, each measurement period does not overlap each other, and the gain value adjustment period of the automatic gain control unit is greater than or equal to the measurement period of the power measurement module.
10.如附记4所述的无线通信终端，其中在所述自动增益控制单元处于高速模式时，所述功率测量模块的测量周期设置为接收信号中的参考信号的最大间隔或者比接收信号中的参考信号的最大间隔大一个符号长度，各个测量周期互相重叠，所述自动增益控制单元的增益值调整周期小于所述功率测量模块的测量周期。10. The wireless communication terminal as described in Supplementary Note 4, wherein when the automatic gain control unit is in the high-speed mode, the measurement cycle of the power measurement module is set to the maximum interval of the reference signal in the received signal or the ratio of the reference signal in the received signal The maximum interval of the reference signal is longer than one symbol length, each measurement period overlaps with each other, and the gain value adjustment period of the automatic gain control unit is shorter than the measurement period of the power measurement module.
11.如附记4所述的无线通信终端，其中在所述自动增益控制单元处于低速模式时且所述无线通信终端处于已获取帧定时未获取帧配置的状态时，所述自动增益控制单元只在每个半帧的第一子帧重新生成增益值。11. The wireless communication terminal according to Supplement 4, wherein when the automatic gain control unit is in the low-speed mode and the wireless communication terminal is in a state where the frame timing has been acquired but the frame configuration has not been acquired, the automatic gain control unit Gain values are regenerated only in the first subframe of each field.
12.如附记4所述的无线通信终端，其中在所述自动增益控制单元处于低速模式时且所述无线通信终端处于已获取帧定时和帧配置的状态时，所述自动增益控制单元只在下行子帧重新生成增益值。12. The wireless communication terminal as described in supplementary note 4, wherein when the automatic gain control unit is in the low speed mode and the wireless communication terminal is in a state where frame timing and frame configuration have been acquired, the automatic gain control unit only The gain value is regenerated in the downlink subframe.
13.如附记11或12所述的无线通信终端，其中在所述自动增益控制单元处于低速模式时，所述平均模块中的先前的功率调整量的权重与当前的功率调整量的权重之比为1～9。13. The wireless communication terminal according to Supplementary Note 11 or 12, wherein when the automatic gain control unit is in the low-speed mode, the weight of the previous power adjustment amount in the averaging module and the weight of the current power adjustment amount The ratio is 1-9.
14.如附记11或12所述的无线通信终端，其中所述目标功率为所述模数变换器的最大量化功率与裕度值之差，在所述自动增益控制单元处于低速模式时，所述裕度值设置为9～36dB。14. The wireless communication terminal according to Supplementary Note 11 or 12, wherein the target power is the difference between the maximum quantization power of the analog-to-digital converter and a margin value, and when the automatic gain control unit is in the low-speed mode, The margin value is set to 9-36dB.
15.如附记14所述的无线通信终端，在所述自动增益控制单元处于低速模式时，所述裕度值设置为18～27dB。15. The wireless communication terminal according to supplementary note 14, when the automatic gain control unit is in the low-speed mode, the margin value is set to 18-27dB.
16.如附记11或12所述的无线通信终端，其中在所述自动增益控制单元处于低速模式时，所述功率测量模块的测量周期设置为一个子帧。16. The wireless communication terminal according to Supplement 11 or 12, wherein when the automatic gain control unit is in the low-speed mode, the measurement period of the power measurement module is set to one subframe.
17.如附记11所述的无线通信终端，其中在所述自动增益控制单元处于低速模式时且所述无线通信终端处于已获取帧定时未获取帧配置的状态时，所述自动增益控制单元先处于低速模式的过渡阶段，在该过渡阶段中，在固定的下行子帧，采用与高速模式下相同的工作参数进行自动增益控制。17. The wireless communication terminal according to supplementary note 11, wherein when the automatic gain control unit is in the low-speed mode and the wireless communication terminal is in a state where the frame timing has been acquired but the frame configuration has not been acquired, the automatic gain control unit Firstly, it is in the transition stage of the low-speed mode, and in the transition stage, in the fixed downlink subframe, the automatic gain control is performed using the same working parameters as those in the high-speed mode.
18.一种用于无线通信终端的自动增益控制方法，包括：18. An automatic gain control method for a wireless communication terminal, comprising:
根据所述无线通信终端的状态来设置自动增益控制操作的模式；以及setting a mode of automatic gain control operation according to the state of the wireless communication terminal; and
按照设置的自动增益控制的模式对所述无线通信终端的接收信号进行自动增益控制操作；performing an automatic gain control operation on the received signal of the wireless communication terminal according to the set automatic gain control mode;
其中，所述无线通信终端的状态包括未获取帧定时的状态和已获取帧定时的状态，所述自动增益控制操作的模式包括高速模式和低速模式，在高速模式下增益值调整周期小于在低速模式下的增益值调整周期，在所述无线通信终端进入未获取帧定时的状态时将所述自动增益控制操作的模式设置为高速模式，在所述无线通信终端进入已获取帧定时的状态时将所述自动增益控制操作的模式设置为低速模式。Wherein, the state of the wireless communication terminal includes a state of not acquiring frame timing and a state of acquiring frame timing, and the mode of operation of the automatic gain control includes a high-speed mode and a low-speed mode, and the gain value adjustment period in the high-speed mode is shorter than that in the low-speed mode. The gain value adjustment period in the mode, when the wireless communication terminal enters the state of not acquiring frame timing, the mode of the automatic gain control operation is set to a high-speed mode, and when the wireless communication terminal enters the state of acquiring frame timing The mode of the automatic gain control operation is set to the low speed mode.
19.如附记18所述的方法，其中所述自动增益控制操作在高速模式下的增益值调整周期小于等于一个子帧长度，而在低速模式下的增益值调整周期大于一个子帧长度。19. The method according to supplementary note 18, wherein the gain adjustment period of the automatic gain control operation in the high-speed mode is less than or equal to one subframe length, and the gain value adjustment period in the low-speed mode is longer than one subframe length.
20.如附记18所述的方法，其中所述已经获取帧定时的状态包括已获取帧定时未获取帧配置的状态和已获取帧定时和帧配置的状态。20. The method according to supplementary note 18, wherein the state of having obtained frame timing includes a state of having obtained frame timing but not obtaining frame configuration, and a state of having obtained frame timing and frame configuration.
| Application Number | Priority Date | Filing Date | Title |
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| CN201010244333.0ACN102348274B (en) | 2010-07-30 | 2010-07-30 | Wireless communication terminal |
| JP2011167115AJP5765120B2 (en) | 2010-07-30 | 2011-07-29 | Wireless communication terminal and automatic gain control method |
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| CN201010244333.0ACN102348274B (en) | 2010-07-30 | 2010-07-30 | Wireless communication terminal |
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| Country | Link |
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| CN (1) | CN102348274B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347925B (en)* | 2010-07-30 | 2015-03-11 | 富士通株式会社 | Method and apparatus for detecting synchronization symbol |
| CN103379607B (en)* | 2012-04-17 | 2018-01-30 | 中兴通讯股份有限公司 | The gain control method and device of TD HSPA+ terminal devices |
| CN103841597B (en)* | 2012-11-27 | 2017-05-17 | 联芯科技有限公司 | Frequency point scanning method and device for TD-SCDMA system |
| CN105657786B (en)* | 2016-01-20 | 2019-05-28 | 华为技术有限公司 | The method of the adjust gain of user equipment and low-noise amplifier |
| CN108462977B (en)* | 2017-02-21 | 2020-07-31 | 深圳市中兴微电子技术有限公司 | A kind of automatic gain control method and device |
| CN111884665B (en)* | 2020-09-28 | 2021-01-01 | 中国人民解放军国防科技大学 | Digital receiver automatic gain control method based on maximum entropy |
| CN114501601A (en)* | 2020-11-11 | 2022-05-13 | 中国移动通信有限公司研究院 | Wireless signal control method, device, device and storage medium |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6310865B1 (en)* | 1997-06-20 | 2001-10-30 | Nec Corporation | High-speed wireless access device |
| US6420934B1 (en)* | 2000-08-24 | 2002-07-16 | Telencomm, Inc. | Automatic gain control circuit for signal with diverse power level range |
| CN1381957A (en)* | 2000-11-01 | 2002-11-27 | 日本电气株式会社 | Automatic gain control circuit and method of direct sequenc spread spectrum receiver |
| CN101013914A (en)* | 2007-02-15 | 2007-08-08 | 中兴通讯股份有限公司 | Automatic gain control method and device for WCDMA mobile terminal |
| CN101171746A (en)* | 2005-03-11 | 2008-04-30 | 高通股份有限公司 | Automatic Gain Control for Wireless Receivers |
| CN201219265Y (en)* | 2008-04-08 | 2009-04-08 | 北京汉潮大成科技孵化器有限公司 | Automatic gain control device |
| CN101461135A (en)* | 2006-04-03 | 2009-06-17 | 高通股份有限公司 | Method and system for automatic gain control with intelligent selection of signal samples |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3393874B2 (en)* | 1991-05-17 | 2003-04-07 | 株式会社東芝 | Automatic gain control method and automatic gain control circuit |
| KR100547840B1 (en)* | 2003-06-04 | 2006-01-31 | 삼성전자주식회사 | Automatic Gain Control with Fast Settling Time |
| KR100668663B1 (en)* | 2005-09-30 | 2007-01-12 | 한국전자통신연구원 | Automatic Gain Control Apparatus and Method of Mobile Station in OPDM System |
| JP2008312027A (en)* | 2007-06-15 | 2008-12-25 | Sanyo Electric Co Ltd | Receiving device and method |
| JP4858373B2 (en)* | 2007-09-12 | 2012-01-18 | 住友電気工業株式会社 | Gain adjustment circuit and radio communication apparatus |
| US8331892B2 (en)* | 2008-03-29 | 2012-12-11 | Qualcomm Incorporated | Method and system for DC compensation and AGC |
| US20090268678A1 (en)* | 2008-04-24 | 2009-10-29 | Fujitsu Limited | Method and apparatus for automatic gain control in a mobile orthogonal frequency division multiple access (ofdma) network |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6310865B1 (en)* | 1997-06-20 | 2001-10-30 | Nec Corporation | High-speed wireless access device |
| US6420934B1 (en)* | 2000-08-24 | 2002-07-16 | Telencomm, Inc. | Automatic gain control circuit for signal with diverse power level range |
| CN1381957A (en)* | 2000-11-01 | 2002-11-27 | 日本电气株式会社 | Automatic gain control circuit and method of direct sequenc spread spectrum receiver |
| CN101171746A (en)* | 2005-03-11 | 2008-04-30 | 高通股份有限公司 | Automatic Gain Control for Wireless Receivers |
| CN101461135A (en)* | 2006-04-03 | 2009-06-17 | 高通股份有限公司 | Method and system for automatic gain control with intelligent selection of signal samples |
| CN101013914A (en)* | 2007-02-15 | 2007-08-08 | 中兴通讯股份有限公司 | Automatic gain control method and device for WCDMA mobile terminal |
| CN201219265Y (en)* | 2008-04-08 | 2009-04-08 | 北京汉潮大成科技孵化器有限公司 | Automatic gain control device |
| Publication number | Publication date |
|---|---|
| CN102348274A (en) | 2012-02-08 |
| JP2012034369A (en) | 2012-02-16 |
| JP5765120B2 (en) | 2015-08-19 |
| Publication | Publication Date | Title |
|---|---|---|
| CN102348274B (en) | Wireless communication terminal | |
| CN102348271B (en) | Wireless communication terminal and automatic gain control method | |
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