CN113824491B - Ku/Ka dual-band satellite-communication ground station-oriented multi-frequency-point interference sampling circuit and method - Google Patents
Ku/Ka dual-band satellite-communication ground station-oriented multi-frequency-point interference sampling circuit and methodDownload PDFInfo
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Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及卫星通信抗干扰技术领域，尤其涉及一种面向Ku/Ka双频段卫通地面站的多频点干扰取样电路及方法。The invention relates to the technical field of satellite communication anti-jamming, in particular to a multi-frequency interference sampling circuit and method for Ku/Ka dual-band satellite communication ground stations.
背景技术Background technique
随着低成本卫星发射技术的进步，车载、舰载和固定式Ku和Ka双频段卫星地面站用户数量越来越多。卫通地面站通常采用Ku和Ka双频段集成一体的卫通天线接收多个频点的下行信号，其主要特点是尽管卫通天线主瓣增益很高，但到达地面的卫星下行信号电平较弱，且对于卫通天线旁瓣而言，仍然具有较高的副瓣，因而其他地面终端或者干扰设备发射的同频段空间非合作干扰很有可能通过副瓣区域进入卫通地面站，影响卫通地面站接收信噪比。由于非合作干扰的来向和频率不确定性，目前卫通地面站缺乏多频点干扰信号的取样电路和控制方法，尤其是面向Ku和Ka双频段多频点干扰信号同时处理的情况。With the advancement of low-cost satellite launch technology, the number of users of vehicle-mounted, ship-borne and fixed Ku and Ka dual-band satellite ground stations is increasing. Satellite ground stations usually use Ku and Ka dual-band integrated satellite antennas to receive downlink signals at multiple frequencies. Its main feature is that although the main lobe gain of the satellite antenna is high, the level of satellite downlink signals reaching the ground is relatively high. Weak, and for the satellite antenna side lobes, it still has a high side lobe, so the non-cooperative interference in the same frequency band space emitted by other ground terminals or interfering equipment is likely to enter the satellite communication ground station through the side lobe area, affecting the satellite communication. The signal-to-noise ratio received by the ground station. Due to the origin and frequency uncertainty of non-cooperative interference, the current satellite ground station lacks sampling circuits and control methods for multi-frequency interference signals, especially for the simultaneous processing of Ku and Ka dual-band multi-frequency interference signals.
申请号为CN202010230631.8的发明专利公开了一种卫星地面站的非合作干扰抑制装置及其控制算法。其包括一个辅助阵列天线、一个多通道低噪放下变频单元、一个功分器组、一个信标信号干扰抑制处理单元和一个数据信号干扰抑制处理单元。通过使用独立的信标信号和数据信号干扰抑制单元，同步对信标信号和数据信号进行干扰抑制处理，降低了对信标信号和数据信号进行数字化所需的采样速率，适用于工作带宽大的卫星地面站；通过将干扰抑制处理输出的数字信号转换到中频模拟信号再输出，实现了对信标信号和数据信号的透明转发，使干扰抑制装置适用于多种通信体制。但是，该装置存在处理频段单一，处理频点数量受数据信号干扰抑制处理单元的带宽限制的不足，难以满足Ku和Ka频段多离散频点的同时干扰取样处理。The invention patent with the application number CN202010230631.8 discloses a non-cooperative interference suppression device for a satellite ground station and a control algorithm thereof. It includes an auxiliary array antenna, a multi-channel low-noise down-conversion unit, a power divider group, a beacon signal interference suppression processing unit and a data signal interference suppression processing unit. By using an independent beacon signal and data signal interference suppression unit, the beacon signal and the data signal are simultaneously subjected to interference suppression processing, which reduces the sampling rate required for digitizing the beacon signal and the data signal, and is suitable for large operating bandwidths. Satellite ground station; by converting the digital signal output from the interference suppression processing to the intermediate frequency analog signal and outputting it, the transparent forwarding of the beacon signal and the data signal is realized, making the interference suppression device suitable for various communication systems. However, this device has the shortcomings of a single processing frequency band, and the number of processing frequency points is limited by the bandwidth of the data signal interference suppression processing unit, and it is difficult to meet the simultaneous interference sampling processing of multiple discrete frequency points in the Ku and Ka bands.
申请号为CN201811155041.2的发明专利公开了一种双频段多通道射频干扰对消装置。其包括干扰取样单元、干扰对消单元和监控单元。所述干扰取样单元，其射频输入为第一频段发射源和第二频段发射源发射信号，其控制输入端与监控单元的取样控制端相连，其直通输出端与各发射负载分别相连，其第一频段耦合输出端和第二频段耦合输出端分别与干扰对消单元的第一频段耦合输入端和第二频段耦合输入端相连；所述干扰对消单元的第一频段参考输入端与干扰取样单元第一频段耦合输出端相连，其第二频段参考输入端与干扰取样单元第二频段耦合输出端相连，其接收端与接收天线相连。但是，该装置采用直接有线射频耦合的取样方式，要求干扰源已知和高频段射频取样插入损耗过大的问题，不适用于Ka/Ku频段空间辐射的非合作干扰信号的取样。The invention patent with the application number CN201811155041.2 discloses a dual-band multi-channel radio frequency interference cancellation device. It includes an interference sampling unit, an interference cancellation unit and a monitoring unit. The radio frequency input of the interference sampling unit is the transmission signal of the first frequency band transmitter and the second frequency band transmitter, its control input end is connected with the sampling control end of the monitoring unit, its straight-through output end is respectively connected with each transmission load, and its first A frequency band coupling output end and a second frequency band coupling output end are respectively connected to the first frequency band coupling input end and the second frequency band coupling input end of the interference cancellation unit; the first frequency band reference input end of the interference cancellation unit is connected to the interference sampling The first frequency band coupling output end of the unit is connected to the second frequency band reference input end of the unit is connected to the second frequency band coupling output end of the interference sampling unit, and the receiving end is connected to the receiving antenna. However, this device adopts the sampling method of direct wired radio frequency coupling, which requires the interference source to be known and the problem of excessive insertion loss of high-frequency radio frequency sampling.
有鉴于此，有必要提供一种面向Ku/Ka双频段卫通地面站的多频点干扰取样电路及方法，在空间中同时提取Ku和Ka双频段多个离散工作频点正常通信信号和干扰信号，提升多频点非合作干扰信号处理能力，以解决上述问题。In view of this, it is necessary to provide a multi-frequency interference sampling circuit and method for the Ku/Ka dual-band satellite communication ground station, which can simultaneously extract the normal communication signals and interference of multiple discrete operating frequency points in the Ku and Ka dual-band in space. signal, and improve the multi-frequency non-cooperative interference signal processing capability to solve the above problems.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种面向Ku/Ka双频段卫通地面站的多频点干扰取样电路。The purpose of the present invention is to provide a multi-frequency interference sampling circuit for Ku/Ka dual-band satellite communication ground station.
为实现上述发明目的，本发明提供了一种面向Ku/Ka双频段卫通地面站的多频点干扰取样电路，其包括取样变频单元、参考生成单元、切换矩阵单元、信号控制单元；In order to achieve the above purpose of the invention, the present invention provides a multi-frequency interference sampling circuit for Ku/Ka dual-band satellite communication ground stations, which includes a sampling frequency conversion unit, a reference generation unit, a switching matrix unit, and a signal control unit;
所述取样变频单元包括M个Ka频段取样变频单元和N个Ku频段取样变频单元；其用于将空间Ka频段和Ku频段干扰信号接收、放大、滤波、选通及下变频至中频信号；The sampling frequency conversion unit includes M Ka frequency band sampling frequency conversion units and N Ku frequency band sampling frequency conversion units; it is used for receiving, amplifying, filtering, gating and down-converting the spatial Ka frequency band and Ku frequency band interference signal to an intermediate frequency signal;
所述参考生成单元包括分别与M个Ka频段取样变频单元的输出端、N个Ku频段取样变频单元的输出端电性连接的2组参考输入端、与所述2组参考输入端对应设置的2组参考输出端以及若干参考控制端；The reference generation unit includes 2 groups of reference input terminals that are electrically connected to the output ends of the M Ka-band sampling and frequency conversion units and the output ends of the N Ku-band sampling and frequency conversion units, respectively, and the 2 groups of reference input terminals are set correspondingly. 2 groups of reference output terminals and several reference control terminals;
所述切换矩阵单元包含2K个矩阵输入端、L×K个矩阵输出端和若干矩阵控制端，其中K≥M+1且K≥N+1，L为卫通接收Ka频段和Ku频段频点数量；所述矩阵输入端与所述参考输出端电性连接；所述切换矩阵单元用于实现L路M个Ka频段和N个Ku频段的接收信号选通；The switching matrix unit includes 2K matrix input terminals, L×K matrix output terminals and several matrix control terminals, where K≥M+1 and K≥N+1, and L is the frequency point of Ka-band and Ku-band received by Satcom Quantity; the matrix input terminal is electrically connected to the reference output terminal; the switching matrix unit is used to realize the gating of received signals of L channels, M Ka-bands and N Ku-bands;
所述信号控制单元包括与所述矩阵输出端对应设置且电性连接的L×K个信号输入端、L个信号输出端和若干通信端，L个所述信号输出端分别与卫通调制解调器接收端电性连接，所述通信端分别与所述取样变频单元的控制端、所述参考生成单元的参考控制端和所述切换矩阵单元的矩阵控制端互联；所述信号控制单元用于控制多通道Ka频段和Ku频段离散单频点信号的控制、处理与状态监测。The signal control unit includes L×K signal input ends, L signal output ends and a plurality of communication ends, which are arranged corresponding to the matrix output ends and are electrically connected, and the L signal output ends are respectively received by the Satcom modem. The terminals are electrically connected, and the communication terminals are respectively interconnected with the control terminal of the sampling and frequency conversion unit, the reference control terminal of the reference generation unit and the matrix control terminal of the switching matrix unit; the signal control unit is used to control multiple Control, processing and status monitoring of discrete single-frequency point signals in channel Ka-band and Ku-band.
作为本发明的进一步改进，所述电路还包括远程显控单元；所述远程显控单元包括与所述信号控制单元通信端电性连接的通信端、远程系统管理微处理器、显示屏和按键；所述远程显控单元用于远程配置参数和状态显示。As a further improvement of the present invention, the circuit further includes a remote display and control unit; the remote display and control unit includes a communication terminal electrically connected to the communication terminal of the signal control unit, a remote system management microprocessor, a display screen and a button ; The remote display and control unit is used for remote configuration parameters and status display.
作为本发明的进一步改进，所述取样变频单元由干扰取样天线和下变频模块构成；所述干扰取样天线包括M个Ka频段干扰取样天线和N个Ku频段干扰取样天线；As a further improvement of the present invention, the sampling frequency conversion unit is composed of an interference sampling antenna and a down-conversion module; the interference sampling antenna includes M Ka-band interference sampling antennas and N Ku-band interference sampling antennas;
所述干扰取样天线的极化类型和极化方向与卫通天线同频段接收极化类型和极化方向相同。The polarization type and polarization direction of the interference sampling antenna are the same as the receiving polarization type and polarization direction of the satellite communication antenna in the same frequency band.
作为本发明的进一步改进，所述下变频模块包括分别与M个所述Ka频段取样天线和N个Ka频段取样天线同频段且电性连接的M个Ka频段下变频模块和N个Ku频段下变频模块，其还包括分别与2组所述参考输入端电性连接的1个卫通天线Ka频段下变频模块和1个卫通天线Ku频段下变频模块；As a further improvement of the present invention, the down-conversion module includes M Ka-band down-conversion modules and N Ku-band down-conversion modules that are electrically connected to the same frequency band as the M Ka-band sampling antennas and the N Ka-band sampling antennas, respectively. A frequency conversion module, which further includes a satellite antenna Ka-band down-conversion module and a satellite Ku-band down-conversion module that are electrically connected to the two sets of the reference input terminals respectively;
前述下变频模块的输出端分别与所述参考生成单元的参考输入端电性连接，分别用于M路Ka频段干扰取样信号及1路Ka频段卫通接收信号、N路Ku频段干扰取样信号及1路Ku频段卫通接收信号的滤波、低噪声放大、极化通道选择、下变频至对应频段中频信号。The output ends of the aforesaid down-conversion modules are respectively electrically connected with the reference input ends of the reference generation unit, and are respectively used for M channels of Ka-band interference sampling signals and 1 channel of Ka-band satellite communication receiving signals, and N channels of Ku-band interference sampling signals and Filtering, low-noise amplification, polarization channel selection, down-conversion to corresponding frequency band intermediate frequency signal of 1 channel Ku-band satellite signal.
作为本发明的进一步改进，所述参考生成单元还包括若干信道模块和一个电源时钟模块，其串接在所述取样变频单元和所述切换矩阵单元之间，用于为同频段下变频模块提供同源外部参考信号，所述参考信号可由内部晶振产生或者外部输入源提供；As a further improvement of the present invention, the reference generation unit further includes a plurality of channel modules and a power clock module, which are connected in series between the sampling frequency conversion unit and the switching matrix unit, and are used to provide the same frequency band down-conversion module. Homologous external reference signal, the reference signal can be generated by an internal crystal oscillator or provided by an external input source;
每个所述信道模块用于控制相连的1路所述取样变频单元的中频信号增益、变频供电及参考时钟；所述电源时钟模块用于为所述取样变频单元进行电源管理，控制参考信号切换及外部通信。Each of the channel modules is used to control the gain of the intermediate frequency signal, the frequency conversion power supply and the reference clock of the connected 1 channel of the sampling frequency conversion unit; the power clock module is used to manage the power supply for the sampling frequency conversion unit and control the switching of the reference signal and external communications.
作为本发明的进一步改进，所述切换矩阵单元包括若干组射频全交换矩阵和一个切换控制模块，每组所述射频全交换矩阵包括功分器、开关，可通过所述开关切换选择输出多路所述参考生成单元的同频段中频信号；所述切换控制模块用于不同频点信号的本地或远程分选与切换输出。As a further improvement of the present invention, the switching matrix unit includes several groups of radio frequency full switching matrices and a switching control module, each group of the radio frequency full switching matrices includes a power divider and a switch, and the output multi-channel can be selected by switching the switches. The intermediate frequency signal of the same frequency band of the reference generation unit; the switching control module is used for local or remote sorting and switching output of signals of different frequency points.
作为本发明的进一步改进，所述信号控制单元包括按照频点划分的若干组信号控制模块，所述信号控制模块包括模数转换模块、FPGA芯片及数模转换模块；As a further improvement of the present invention, the signal control unit includes several groups of signal control modules divided according to frequency points, and the signal control modules include an analog-to-digital conversion module, an FPGA chip and a digital-to-analog conversion module;
或者，所述信号控制模块包括按照频点划分的若干组模数转换模块、FPGA芯片、数模转换模块以及系统管理微处理器。Alternatively, the signal control module includes several groups of analog-to-digital conversion modules, FPGA chips, digital-to-analog conversion modules, and system management microprocessors divided according to frequency points.
作为本发明的进一步改进，所述取样变频单元上设置有伺服平台。As a further improvement of the present invention, a servo platform is arranged on the sampling frequency conversion unit.
为实现上述发明目的，本发明还提供了一种面向Ku/Ka双频段卫通地面站的多频点干扰取样方法，其采用上述面向Ku/Ka双频段卫通地面站的多频点干扰取样电路进行取样，包括如下步骤：In order to achieve the above purpose of the invention, the present invention also provides a multi-frequency interference sampling method for Ku/Ka dual-band satellite communication ground stations, which adopts the above-mentioned multi-frequency interference sampling for Ku/Ka dual-band satellite communication ground stations. The circuit performs sampling, including the following steps:
S1，取样电路配置：将卫通接收信号和若干干扰取样信号按Ka和Ku频段分组；将每组干扰取样天线按照预设干扰取样方向布置，保证所述干扰取样天线在干扰来波方向上增益覆盖，每个干扰取样天线与取样变频单元中对应频段的下变频模块相连，所述取样频单元通过同轴电缆与所述参考生成单元电性相连，所述参考生成单元的参考输出端与所述切换矩阵单元的多组射频输入端接口相连，所述切换矩阵单元同一组矩阵输出端接口通过同轴电缆与同一个所述信号处理单元的信号输入端接口相连，实现所述干扰取样天线与所述取样变频单元、所述参考生成单元、所述切换矩阵单元及所述信号处理单元共同构建而成的多分组离散多频点干扰信号取样信道；S1, sampling circuit configuration: group the satellite reception signal and several interference sampling signals according to the Ka and Ku frequency bands; arrange each group of interference sampling antennas according to the preset interference sampling direction to ensure that the interference sampling antenna gains in the direction of the interference wave Covering, each interference sampling antenna is connected to the down-conversion module of the corresponding frequency band in the sampling frequency conversion unit, the sampling frequency unit is electrically connected to the reference generation unit through a coaxial cable, and the reference output end of the reference generation unit is connected to the reference generation unit. The multiple groups of radio frequency input ports of the switching matrix unit are connected, and the same group of matrix output ports of the switching matrix unit are connected to the signal input port of the same signal processing unit through a coaxial cable, so that the interference sampling antenna is connected to the same signal input port of the signal processing unit. a multi-group discrete multi-frequency interference signal sampling channel jointly constructed by the sampling frequency conversion unit, the reference generation unit, the switching matrix unit and the signal processing unit;
S2，数据采集初始化：启动干扰取样电路，分组内不同信道的干扰取样天线阵列接收空间电磁波信号，送入对应的下变频模块，参考生成单元开启参考时钟并送入下变频模块，切换矩阵单元默认选通每组信号输出至每组信号控制模块，所述信号控制模块进行同时、连续采集所在分组的各信道原始取样数据，所述原始取样数据包括所述卫通接收信号和所述干扰取样信号；S2, data acquisition initialization: start the interference sampling circuit, the interference sampling antenna array of different channels in the group receives the spatial electromagnetic wave signal, and sends it to the corresponding down-conversion module, the reference generation unit turns on the reference clock and sends it to the down-conversion module, and the switching matrix unit defaults to Gating each group of signals and outputting them to each group of signal control modules, the signal control modules simultaneously and continuously collect the original sampling data of each channel in the group, and the original sampling data includes the satellite reception signal and the interference sampling signal ;
S3，取样信号处理：所述原始取样数据通过所述信号控制单元的模数转换模块转化成数字信号，传输至FPGA芯片，所述FPGA芯片对所述数字信号进行处理后输出至数模转换模块，所述数模转换模块将处理后信号转化为射频信号输出；S3, sampling signal processing: the original sampling data is converted into a digital signal by the analog-to-digital conversion module of the signal control unit, and transmitted to the FPGA chip, and the FPGA chip processes the digital signal and outputs it to the digital-to-analog conversion module. , the digital-to-analog conversion module converts the processed signal into a radio frequency signal for output;
S4，通道切换控制：所述信号控制单元的系统管理微处理器形成目标控制数据指令并转换为电信号，通过控制总线传输至所述取样变频单元、所述参考生成单元、切换矩阵单元及远程显控单元，前述各单元接收所述电信号并转换为目标控制数据指令，并根据所述目标控制数据指令解析执行目标单元，目标单元根据目标控制数据指令执行控制。S4, channel switching control: the system management microprocessor of the signal control unit forms a target control data command and converts it into an electrical signal, and transmits it to the sampling frequency conversion unit, the reference generation unit, the switching matrix unit and the remote control bus through the control bus. A display control unit, each of the aforementioned units receives the electrical signal and converts it into a target control data command, and analyzes and executes the target unit according to the target control data command, and the target unit executes control according to the target control data command.
作为本发明的进一步改进，在步骤S1中，同一干扰取样方向上配置的取样变频单元数量大于干扰源数量。As a further improvement of the present invention, in step S1, the number of sampling frequency conversion units configured in the same interference sampling direction is greater than the number of interference sources.
作为本发明的进一步改进，在步骤S2中，还包括对所述取样变频单元、所述参考生成单元、所述切换矩阵单元及所述信号控制单元内部控制状态的采集。As a further improvement of the present invention, in step S2, the acquisition of the internal control states of the sampling and frequency conversion unit, the reference generation unit, the switching matrix unit and the signal control unit is also included.
作为本发明的进一步改进，在步骤S3中，FPGA芯片对所述卫通接收信号和所述干扰取样信号进行解析处理，所述解析处理包括但不限于为干扰检测运算或者自适应对消运算。As a further improvement of the present invention, in step S3, the FPGA chip performs analysis processing on the satellite signal received and the interference sampling signal, and the analysis processing includes but is not limited to interference detection operation or adaptive cancellation operation.
作为本发明的进一步改进，在步骤S4中，所述目标控制数据指令包括识别数据及控制数据，所述识别数据包含各单元识别信息，所述控制数据包括对应单元的控制指令。As a further improvement of the present invention, in step S4, the target control data instruction includes identification data and control data, the identification data includes identification information of each unit, and the control data includes the control instruction of the corresponding unit.
本发明的有益效果是：The beneficial effects of the present invention are:
1、本发明提供的面向Ku/Ka双频段卫通地面站的多频点干扰取样方法，充分利用了射频链路的可复用特性和总线控制方式，相比于传统干扰取样方式，可以实现针对Ku和Ka双频段卫通地面站干扰取样的广覆盖、多频点、高实时的统一提取、切换控制。1. The multi-frequency interference sampling method for Ku/Ka dual-band satellite communication ground stations provided by the present invention makes full use of the reusable characteristics of the radio frequency link and the bus control method. Compared with the traditional interference sampling method, it can realize Wide coverage, multi-frequency, high real-time unified extraction and switching control for Ku and Ka dual-band satellite communication ground station interference sampling.
2、本发明提供的面向Ku/Ka双频段卫通地面站的多频点干扰取样电路，采用Ku和Ka频段分段的信号链路和控制链路一体化的干扰取样方案，可实时生成多个离散频点的卫星通信信号和干扰信号的切换，为后端干扰信号处理、控制和测试提供便捷数据支撑。2. The multi-frequency interference sampling circuit for the Ku/Ka dual-band satellite communication ground station provided by the present invention adopts the integrated interference sampling scheme of the signal link and the control link of the Ku and Ka frequency bands, which can generate multiple signals in real time. The switching of satellite communication signals and interference signals at discrete frequency points provides convenient data support for back-end interference signal processing, control and testing.
附图说明Description of drawings
图1 为本发明实施例中面向Ku/Ka双频段卫通地面站的多频点干扰取样电路拓扑结构图。FIG. 1 is a topological structure diagram of a multi-frequency interference sampling circuit for a Ku/Ka dual-band satellite communication ground station in an embodiment of the present invention.
图2 为本发明实施例中面向Ku/Ka双频段卫通地面站的多频点干扰取样电路的取样变频单元结构框图；2 is a structural block diagram of a sampling frequency conversion unit of a multi-frequency interference sampling circuit facing the Ku/Ka dual-band satellite communication ground station in an embodiment of the present invention;
图3 为本发明实施例中面向Ku/Ka双频段卫通地面站的多频点干扰取样电路的切换矩阵单元结构框图；3 is a block diagram of the switching matrix unit structure of the multi-frequency interference sampling circuit facing the Ku/Ka dual-band satellite communication ground station in the embodiment of the present invention;
图4 为本发明实施例中面向Ku/Ka双频段卫通地面站的多频点干扰取样电路控制示意图。FIG. 4 is a schematic diagram of control of a multi-frequency interference sampling circuit for a Ku/Ka dual-band satellite communication ground station in an embodiment of the present invention.
图5 为本发明实施例中面向Ku/Ka双频段卫通地面站的多频点干扰取样方法工作流程图。FIG. 5 is a working flowchart of a multi-frequency interference sampling method for a Ku/Ka dual-band satellite communication ground station in an embodiment of the present invention.
具体实施方式Detailed ways
为了使本发明的目的、技术方案和优点更加清楚，下面结合附图和具体实施例对本发明进行详细描述。In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
在此，还需要说明的是，为了避免因不必要的细节而模糊了本发明，在附图中仅仅示出了与本发明的方案密切相关的结构和/或处理步骤，而省略了与本发明关系不大的其他细节。Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and/or processing steps closely related to the solution of the present invention are shown in the drawings, and the Invent other details that are less relevant.
另外，还需要说明的是，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。In addition, it should be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Also included are other elements not expressly listed or inherent to such a process, method, article or apparatus.
实施例1Example 1
请参阅图1至3所示，实施例1提供了面向Ku/Ka双频段卫通地面站的多频点干扰取样电路，其包括若干取样变频单元、参考生成单元、切换矩阵单元和信号控制单元。1 to 3,
所述取样变频单元由干扰取样天线和下变频模块构成，包括M个Ka频段取样变频单元、N个Ku频段取样变频单元以及1个卫通天线Ka频段下变频模块和1个卫通天线Ku频段下变频模块。所述Ka频段取样变频单元输出端通过同轴电缆与所述参考生成单元第1组输入端电连接，Ku频段取样变频单元输出端通过同轴电缆与所述参考生成单元第2组输入端电连接；所述取样变频单元用于将空间Ka频段和Ku频段干扰信号接收、放大、滤波、选通及下变频至中频信号。The sampling frequency conversion unit is composed of an interference sampling antenna and a down-conversion module, including M Ka-band sampling and frequency-conversion units, N Ku-band sampling and frequency-conversion units, a Ka-band down-conversion module of a Satcom antenna, and a Ku-band of a Satcom antenna. Down conversion module. The output end of the Ka-band sampling and frequency conversion unit is electrically connected to the first group of input ends of the reference generation unit through a coaxial cable, and the output end of the Ku-band sampling and frequency conversion unit is electrically connected to the second group of input ends of the reference generation unit through a coaxial cable. connection; the sampling frequency conversion unit is used for receiving, amplifying, filtering, gating and down-converting the spatial Ka-band and Ku-band interference signals to intermediate frequency signals.
在本实施方式中，所述干扰取样天线包括M个Ka频段干扰取样天线和N个Ku频段干扰取样天线；所述Ka频段干扰取样天线和Ka频段干扰取样天线，分别用于将Ka频段和Ku频段的空间电磁波干扰信号转化为电信号，其引出馈源接口射频输出，分别与同频段Ka频段下变频模块和Ku频段下变频模块电性连接；所述干扰取样天线的极化类型和极化方向与所述卫通天线同频段接收极化类型和极化方向相同。In this embodiment, the interference sampling antennas include M Ka-band interference sampling antennas and N Ku-band interference sampling antennas; the Ka-band interference sampling antennas and the Ka-band interference sampling antennas are used to separate the Ka-band and Ku-band interference sampling antennas respectively. The space electromagnetic wave interference signal of the frequency band is converted into an electrical signal, which leads out the RF output of the feed interface, and is electrically connected to the Ka-band down-conversion module and the Ku-band down-conversion module of the same frequency band respectively; the polarization type and polarization of the interference sampling antenna The direction is the same as the receiving polarization type and polarization direction of the satellite antenna in the same frequency band.
在具体应用时，所述干扰取样天线为喇叭型、贴片型、极子型中的一种或多种的组合，也可根据需要利用组阵技术，构成多电磁波束覆盖所需干扰取样空间范围。In specific applications, the interference sampling antenna is a combination of one or more of a horn type, a patch type, and a pole type, and an array technology can also be used as required to form multiple electromagnetic beams to cover the required interference sampling space scope.
请参阅图2所示，每个下变频模块包括变频接收电路、频率源电路及电源控制电路，其输出端与所述参考生成单元对应的1路射频输入端电性连接；Referring to FIG. 2 , each down-conversion module includes a frequency-conversion receiving circuit, a frequency source circuit and a power supply control circuit, and the output end thereof is electrically connected to a radio frequency input end corresponding to the reference generating unit;
结合上述，所述下变频模块包括M+1个Ka频段下变频模块和N+1个Ku频段下变频模块，前述各下变频模块的输出端与参考生成单元输入端电性连接，分别用于M路Ka频段干扰取样信号和1路Ka频段卫通接收信号，N路Ku频段干扰取样信号和1路Ku频段卫通接收信号的滤波、低噪声放大、极化通道选择、下变频至对应频段中频信号。In combination with the above, the down-conversion module includes M+1 Ka-band down-conversion modules and N+1 Ku-band down-conversion modules. The outputs of the aforementioned down-conversion modules are electrically connected to the input ends of the reference generation unit, and are respectively used for Filtering, low-noise amplification, polarization channel selection, down-conversion to the corresponding frequency band for M channels of Ka-band interference sampling signals and 1 channel of Ka-band satellite reception signals, and N channels of Ku-band interference sampling signals and 1 channel of Ku-band satellite reception signals IF signal.
其中，所述变频接收电路输入端与所述卫通天线或所述干扰取样天线馈源接口相连，内部输出端与所述频率源电路和所述电源控制电路相连，所述频率源电路与所述变频接收电路相连，用于产生Ku和Ka双频段变频器混频用的本振源信号，所述Ku和Ka双频段下变频模块的变频器本振频率与所述卫通天线对应所述同频段Ku/Ka下变频模块的本振频率相同；所述电源控制电路用于对所述频率源电路进行参考切换控制，并对所述下变频模块内部电源进行转换和滤波隔离。Wherein, the input end of the variable frequency receiving circuit is connected with the satellite antenna or the feed interface of the interference sampling antenna, the internal output end is connected with the frequency source circuit and the power control circuit, and the frequency source circuit is connected with the The frequency conversion receiving circuit is connected to the local oscillator source signal for generating Ku and Ka dual-band frequency converters for mixing, and the frequency converter local oscillator frequency of the Ku and Ka dual-band down-conversion modules corresponds to the satellite antenna. The local oscillator frequency of the Ku/Ka down-conversion module in the same frequency band is the same; the power control circuit is used to perform reference switching control on the frequency source circuit, and convert and filter the internal power supply of the down-conversion module.
所述参考生成单元包括2组输入端、2组输出端和若干控制端，其第1组输入端与M个Ka频段取样变频单元、1个卫通天线Ka频段下变频模块的输出端电性连接，其第2组输入端与N个Ku频段取样变频单元、1个卫通天线Ku频段下变频模块的输出端电连接，所述参考生成单元第1组M个输出端分别与所述切换矩阵单元M组射频输入端电连接，所述参考生成单元第2组N个输出端分别与所述切换矩阵单元N组射频输入端电连接，用于为所述取样变频单元提供同源参考时钟。The reference generation unit includes 2 groups of input ends, 2 groups of output ends and several control ends, and the first group of input ends is electrically connected to the output ends of M Ka-band sampling frequency conversion units and 1 Satcom antenna Ka-band down-conversion module. connected, the second group of input ends is electrically connected to the output ends of N Ku-band sampling frequency conversion units and 1 satellite Ku-band frequency down-conversion module, and the first group of M output ends of the reference generation unit is respectively connected to the switch The M groups of radio frequency input terminals of the matrix unit are electrically connected, and the second group N of output terminals of the reference generation unit are respectively electrically connected to the N groups of radio frequency input terminals of the switching matrix unit, so as to provide a homologous reference clock for the sampling and frequency conversion unit .
在本实施方式中，所述参考生成单元包括若干信道模块和一个电源时钟模块，其串接在所述下变频单元和所述切换矩阵单元之间，用于为所述同频段下变频模块提供同源外部参考信号，所述参考信号可由内部晶振产生或者外部输入源提供；In this embodiment, the reference generation unit includes a plurality of channel modules and a power clock module, which are connected in series between the down-conversion unit and the switching matrix unit, and are used to provide the same-band down-conversion module. Homologous external reference signal, the reference signal can be generated by an internal crystal oscillator or provided by an external input source;
每个所述信道模块用于控制相连的一路所述取样变频单元的中频信号增益、变频供电及参考时钟；所述电源时钟模块用于为所述取样变频单元进行电源管理，控制参考信号切换及外部通信。Each of the channel modules is used to control the gain of the intermediate frequency signal, the frequency conversion power supply and the reference clock of a connected channel of the sampling and frequency conversion unit; the power clock module is used to perform power management for the sampling and frequency conversion unit, control reference signal switching and external communication.
请参阅图3所示，所述切换矩阵单元包含2K个输入端、L*K个输出端和若干控制端，其中K≥M+1且K≥N+1，L为卫通接收Ka频段和Ku频段频点数量；所述切换矩阵单元每一组输入端分别与1个所述参考生成单元第1组输出端、1个所述参考生成单元的第2组输出端电连接，所述切换矩阵单元K组每组1个输出端分别与所述信号控制单元的同一组输入端连接，所述切换矩阵单元用于实现L路M个Ka频段和N个Ku频段的接收信号选通。Please refer to FIG. 3 , the switching matrix unit includes 2K input terminals, L*K output terminals and several control terminals, where K≥M+1 and K≥N+1, L is the Ka-band and The number of Ku-band frequency points; each group of input ends of the switching matrix unit is respectively electrically connected to the first group output end of the reference generation unit and the second group output end of the reference generation unit. One output end of each group of matrix unit K is respectively connected to the same group of input ends of the signal control unit, and the switching matrix unit is used to realize the gating of received signals of M Ka-bands and N Ku-bands of L channels.
所述切换矩阵单元包括多组射频全交换矩阵和一个切换控制模块，每组所述射频全交换矩阵包括功分器、开关，可通过所述开关切换选择输出多路所述参考生成单元的同频段所述中频信号，通过电缆组件与同一所述信号处理单元相连，用于传输单频点所述卫通接收信号和若干路离散同频点所述干扰取样信号至所述信号处理单元，所述切换控制模块用于不同频点信号的本地或远程分选与切换输出。The switching matrix unit includes multiple groups of radio frequency full switching matrices and a switching control module, each group of the radio frequency full switching matrix includes a power divider and a switch, and the switch can be switched to select and output multiple channels of the same reference generation unit. The intermediate frequency signal of the frequency band is connected to the same signal processing unit through a cable assembly, and is used to transmit the single frequency point of the satellite communication receiving signal and several discrete channels of the same frequency point of the interference sampling signal to the signal processing unit, so The switching control module is used for local or remote sorting and switching output of signals of different frequency points.
所述信号控制单元包括L*K个输入端、L个输出端和若干通信端，所述信号控制单元L组每组输入端分别与切换矩阵单元每组的1个输出端电连接，所述信号控制单元L个射频输出端分别与L个卫通调制解调器接收端电连接。所述若干通信端与所述取样变频单元、所述参考生成单元和所述切换矩阵单元的控制端互联，所述信号控制单元用于控制多通道Ka频段和Ku频段离散单频点信号的控制、处理与状态监测。The signal control unit includes L*K input ends, L output ends and a number of communication ends, each group of input ends of the signal control unit L group is respectively electrically connected with one output end of each group of the switching matrix unit, the The L radio frequency output ends of the signal control unit are respectively electrically connected with the L satellite modem receiving ends. The plurality of communication terminals are interconnected with the sampling and frequency conversion unit, the reference generation unit and the control terminal of the switching matrix unit, and the signal control unit is used to control the control of multi-channel Ka-band and Ku-band discrete single-frequency point signals , processing and condition monitoring.
在本实施方式中，所述信号控制单元包括按照频点划分的多组信号控制模块，所述信号控制模块包括模数转换模块、FPGA芯片、数模转换模块以及系统管理微处理器；所述多组按照频点划分。In this embodiment, the signal control unit includes multiple groups of signal control modules divided according to frequency points, and the signal control modules include an analog-to-digital conversion module, an FPGA chip, a digital-to-analog conversion module, and a system management microprocessor; the Groups are divided according to frequency points.
所述模数转换模块包括多路顺序相连的放大器、开关和模数转换器（AnalogDigital Converter，简称ADC），每组所述模数转换模块用于接收、放大所述多路离散同频点卫通接收信号和干扰取样信号，切换中频接收与校准信号，并将所述多路离散同频点卫通接收信号和干扰取样信号转换为卫通数字中频信号和干扰取样数字中频信号；所述FPGA芯片通过若干微带线与若干模数转换模块、系统管理微处理器和数模转换模块相连，用于信号处理；所述数模转换模块包括数模转换器（Digital Analog Converter，简称DAC）、放大器，用于信号转换和放大输出。所述信号控制单元数量可视通信业务需求在可定制范围内调整。The analog-to-digital conversion module includes multiple sequentially connected amplifiers, switches and analog-to-digital converters (Analog Digital Converter, ADC for short), and each group of the analog-to-digital conversion modules is used to receive and amplify the multi-channel discrete co-frequency point guards. Through the receiving signal and the interference sampling signal, the intermediate frequency receiving and calibration signals are switched, and the multi-channel discrete co-frequency point Satcom received signal and the interference sampling signal are converted into the Satcom digital intermediate frequency signal and the interference sampling digital intermediate frequency signal; the FPGA The chip is connected to a number of analog-to-digital conversion modules, a system management microprocessor and a digital-to-analog conversion module through several microstrip lines for signal processing; the digital-to-analog conversion module includes a digital-to-analog converter (Digital Analog Converter, DAC for short), Amplifier for signal conversion and amplifying output. The number of the signal control units can be adjusted within a customizable range depending on the communication service requirements.
实施例2Example 2
由于卫通天线附近具有一定的辐射功率，不宜人员长时间近距离操作。现有干扰取样电路具有通信接口，但不一定具备极化选择、时钟开关和链路切换的远程控制功能。所述远程显控单元通过通信端将与所述信号控制单元、所述取样变频单元、所述参考生成单元和所述切换矩阵单元的控制端互联，可实现多通道Ku和Ka频段离散单频点信号的控制、处理与状态监测。Due to the certain radiation power near the satellite antenna, it is not suitable for personnel to operate at close range for a long time. The existing interference sampling circuit has a communication interface, but does not necessarily have the remote control functions of polarization selection, clock switching and link switching. The remote display and control unit is interconnected with the control end of the signal control unit, the sampling frequency conversion unit, the reference generation unit and the switching matrix unit through the communication terminal, which can realize multi-channel Ku and Ka band discrete single frequency Control, processing and condition monitoring of point signals.
因此，请参阅图4所示，本实施例2相对于实施例1的区别主要在于系统中加入含远程系统管理微处理器的远程显控单元以实现面向Ku和Ka双频段卫通地面站的多频点干扰取样电路远程控制功能。Therefore, please refer to FIG. 4 , the difference between the second embodiment and the first embodiment is mainly that a remote display and control unit including a remote system management microprocessor is added to the system to realize the dual-band satellite communication oriented to Ku and Ka. Multi-frequency interference sampling circuit remote control function.
具体来讲，请参阅图1至图4所示，实施例2的面向Ku/Ka双频段卫通地面站的多频点干扰取样电路，包括若干取样变频单元、参考生成单元、切换矩阵单元、信号控制单元和远程显控单元。Specifically, please refer to FIG. 1 to FIG. 4 , the multi-frequency interference sampling circuit for Ku/Ka dual-band satellite communication ground station in
在本实施方式中，所述信号控制单元包括按照频点划分的若干组信号控制模块，所述信号控制模块包括模数转换模块、FPGA芯片、数模转换模块以及系统管理微处理器，所述多组按照频点划分。所述系统管理微处理器用于运算加载、主控管理、通信。In this embodiment, the signal control unit includes several groups of signal control modules divided according to frequency points, and the signal control modules include an analog-to-digital conversion module, an FPGA chip, a digital-to-analog conversion module, and a system management microprocessor. Groups are divided according to frequency points. The system management microprocessor is used for operation loading, main control management and communication.
所述信号控制单元包括L*K个输入端、L个输出端、本地通信端，所述信号控制单元L组每组输入端分别与切换矩阵单元每组的1个输出端电连接，所述信号控制单元L个射频输出端分别与L个卫通调制解调器接收端电连接。The signal control unit includes L*K input ends, L output ends, and a local communication end, and each group of input ends of the L group of the signal control unit is electrically connected to one output end of each group of the switching matrix unit, respectively. The L radio frequency output ends of the signal control unit are respectively electrically connected with the L satellite modem receiving ends.
所述远程显控单元系统包括与所述信号控制单元通信端电性连接的通信端、远程系统管理微处理器、显示屏和按键，所述远程显控单元的通信端与所述取样变频单元、所述参考生成单元、所述切换矩阵单元和所述信号控制单元的本地通信端配置于同一串口总线内互联，远程显控单元的远程系统管理微处理器用于多通道Ka频段和Ku频段离散单频点信号的参数配置与状态监测。The remote display and control unit system includes a communication terminal electrically connected to the communication terminal of the signal control unit, a remote system management microprocessor, a display screen and a button, and the communication terminal of the remote display and control unit is connected to the sampling frequency conversion unit. , The local communication terminals of the reference generation unit, the switching matrix unit and the signal control unit are configured in the same serial bus for interconnection, and the remote system management microprocessor of the remote display and control unit is used for multi-channel Ka-band and Ku-band discrete Parameter configuration and status monitoring of single frequency signal.
实施例3Example 3
虽然，采用宽波束的取样天线可以有效保障各来向干扰信号的连续采集且根据业务需要合理调整天线极化能够支持不同极化形式干扰信号的取样。但是，在摇摆工作环境卫通地面站多采用伺服平台保证天线锁星状态稳定，取样天线波束随摇摆环境晃动不利于干扰信号取样，在考虑平台摇摆问题时可以在变频取样单元上设置伺服平台。Although the sampling antenna using a wide beam can effectively ensure the continuous collection of interference signals from all directions, and reasonably adjust the antenna polarization according to business needs, it can support the sampling of interference signals in different polarization forms. However, in the swaying working environment, the satellite ground station mostly uses a servo platform to ensure the stability of the antenna lock state. The sampling antenna beam swaying with the swaying environment is not conducive to the sampling of the interference signal. When the platform swing problem is considered, a servo platform can be set on the frequency conversion sampling unit.
因此，本实施例3相对于实施例2的区别主要在于在取样变频单元或者取样天线上设置伺服平台以获取更大的适用场景。Therefore, the difference between the third embodiment and the second embodiment is mainly that a servo platform is set on the sampling frequency conversion unit or the sampling antenna to obtain a larger applicable scene.
具体的，实施例3的面向Ku/Ka双频段卫通地面站的多频点干扰取样电路，所述干扰取样电路包括若干取样变频单元、参考生成单元、切换矩阵单元、信号控制单元和远程显控单元，其中：Specifically, the multi-frequency interference sampling circuit for the Ku/Ka dual-band satellite communication ground station of Embodiment 3, the interference sampling circuit includes a plurality of sampling frequency conversion units, a reference generation unit, a switching matrix unit, a signal control unit, and a remote display unit. control unit, where:
所述取样变频单元由干扰取样天线、下变频模块构成，包括M个Ka频段取样变频单元和N个Ku频段取样变频单元，通过伺服平台保证天线波束俯仰角稳定。The sampling frequency conversion unit is composed of an interference sampling antenna and a down conversion module, including M Ka frequency sampling frequency conversion units and N Ku frequency frequency sampling frequency conversion units, and the antenna beam pitch angle is guaranteed to be stable through a servo platform.
实施例4Example 4
请参阅图5所示，本实施例提供了一种面向Ku/Ka双频段卫通地面站的多频点干扰取样方法，基于上述实施例2提供的干扰取样电路进行取样，包括如下步骤：Referring to FIG. 5 , this embodiment provides a multi-frequency interference sampling method for Ku/Ka dual-band satellite communication ground stations. Sampling is performed based on the interference sampling circuit provided in
S1，取样电路配置：将卫通接收信号和若干干扰取样信号按Ka和Ku频段分组；将每组干扰取样天线按照预设干扰取样方向布置，保证所述干扰取样天线在干扰来波方向上增益覆盖，每个干扰取样天线与取样变频单元中对应频段的下变频模块相连，所述取样频单元通过同轴电缆与所述参考生成单元电性相连，所述参考生成单元的参考输出端与所述切换矩阵单元的多组射频输入端接口相连，所述切换矩阵单元同一组矩阵输出端接口通过同轴电缆与同一个所述信号处理单元的信号输入端接口相连，实现所述干扰取样天线与所述取样变频单元、所述参考生成单元、所述切换矩阵单元及所述信号处理单元共同构建而成的多分组离散多频点干扰信号取样信道；在步骤S1中，同一干扰取样方向上配置的取样变频单元数量大于干扰源数量。S1, sampling circuit configuration: group the satellite reception signal and several interference sampling signals according to the Ka and Ku frequency bands; arrange each group of interference sampling antennas according to the preset interference sampling direction to ensure that the interference sampling antenna gains in the direction of the interference wave Covering, each interference sampling antenna is connected to the down-conversion module of the corresponding frequency band in the sampling frequency conversion unit, the sampling frequency unit is electrically connected to the reference generation unit through a coaxial cable, and the reference output end of the reference generation unit is connected to the reference generation unit. The multiple groups of radio frequency input ports of the switching matrix unit are connected, and the same group of matrix output ports of the switching matrix unit are connected to the signal input port of the same signal processing unit through a coaxial cable, so that the interference sampling antenna is connected to the same signal input port of the signal processing unit. A multi-group discrete multi-frequency interference signal sampling channel jointly constructed by the sampling frequency conversion unit, the reference generation unit, the switching matrix unit and the signal processing unit; in step S1, the configuration is performed in the same interference sampling direction The number of sampling frequency conversion units is greater than the number of interference sources.
S2，数据采集初始化：启动干扰取样电路，分组内不同信道的干扰取样天线阵列接收空间电磁波信号，送入对应的下变频模块，参考生成单元开启参考时钟并送入下变频模块，切换矩阵单元默认选通每组信号输出至每组信号控制模块，所述信号控制模块进行同时、连续采集所在分组的各信道原始取样数据，所述原始取样数据包括所述卫通接收信号和所述干扰取样信号；在步骤S2中，还包括对所述取样变频单元、所述参考生成单元、所述切换矩阵单元及所述信号处理单元内部控制状态的采集。S2, data acquisition initialization: start the interference sampling circuit, the interference sampling antenna array of different channels in the group receives the spatial electromagnetic wave signal, and sends it to the corresponding down-conversion module, the reference generation unit turns on the reference clock and sends it to the down-conversion module, and the switching matrix unit defaults to Gating each group of signals and outputting them to each group of signal control modules, the signal control modules simultaneously and continuously collect the original sampling data of each channel in the group, and the original sampling data includes the satellite reception signal and the interference sampling signal ; In step S2, the sampling and frequency conversion unit, the reference generating unit, the switching matrix unit and the internal control state of the signal processing unit are also collected.
S3，取样信号处理：所述原始取样数据通过所述信号控制单元的模数转换模块转化成数字信号，传输至FPGA芯片，所述FPGA芯片对所述数字信号进行处理后输出至数模转换模块，所述数模转换模块将处理后信号转化为射频信号输出；在步骤S3中，FPGA芯片对所述卫通接收信号和所述干扰取样信号进行解析处理，所述解析处理包括但不限于为干扰检测运算或者自适应对消运算。S3, sampling signal processing: the original sampling data is converted into a digital signal by the analog-to-digital conversion module of the signal control unit, and transmitted to the FPGA chip, and the FPGA chip processes the digital signal and outputs it to the digital-to-analog conversion module. , the digital-to-analog conversion module converts the processed signal into a radio frequency signal for output; in step S3, the FPGA chip performs analytical processing on the satellite reception signal and the interference sampling signal, and the analytical processing includes but is not limited to: Interference detection operation or adaptive cancellation operation.
S4，通道切换控制：所述信号控制单元的系统管理微处理器形成目标控制数据指令并转换为电信号，通过控制总线传输至所述取样变频单元、所述参考生成单元、切换矩阵单元及远程显控单元，前述各单元接收所述电信号并转换为目标控制数据指令，并根据所述目标控制数据指令解析执行目标单元，目标单元根据目标控制数据指令执行控制。S4, channel switching control: the system management microprocessor of the signal control unit forms a target control data command and converts it into an electrical signal, and transmits it to the sampling frequency conversion unit, the reference generation unit, the switching matrix unit and the remote control bus through the control bus. A display control unit, each of the aforementioned units receives the electrical signal and converts it into a target control data command, and analyzes and executes the target unit according to the target control data command, and the target unit executes control according to the target control data command.
在步骤S4中，所述信号控制单元与其他单元采用工业总线互联，互联结构如图4所示，通信模式为全双工模式，目标控制数据指令包括识别数据及控制数据两部分，所述识别数据包含各单元识别信息，所述控制数据包括对应单元的控制指令。In step S4, the signal control unit is interconnected with other units using an industrial bus. The interconnection structure is shown in FIG. 4, the communication mode is a full-duplex mode, and the target control data instruction includes two parts: identification data and control data. The data includes identification information of each unit, and the control data includes control instructions of the corresponding unit.
综上所述，本发明提供了一种面向Ku/Ka双频段卫通地面站的多频点干扰取样电路及方法。所述干扰取样电路包括取样变频单元、参考生成单元、切换矩阵单元、信号控制单元和远程显控单元。通过控制Ku和Ka频段取样天线阵列对空间干扰信号进行取样，并将空间干扰信号转换为取样信号；然后对取样信号下变频处理得到中频干扰信号；利用多通道信号切换矩阵完成各通道离散频点信号的选择；信号控制单元进行卫通接收中频信号与多通道干扰信号处理和状态控制。本发明通过采用多输入多输出切换方案和多频点馈电馈钟方案，可以为现有Ku和Ka双频段卫通地面站在受到干扰时，提供在Ku和Ka双频段实施多频点多通道干扰信号同步接收、取样和处理能力。In summary, the present invention provides a multi-frequency interference sampling circuit and method for Ku/Ka dual-band satellite communication ground stations. The interference sampling circuit includes a sampling frequency conversion unit, a reference generation unit, a switching matrix unit, a signal control unit and a remote display and control unit. The spatial interference signal is sampled by controlling the Ku and Ka-band sampling antenna arrays, and the spatial interference signal is converted into a sampled signal; then the sampled signal is down-converted to obtain an intermediate frequency interference signal; the multi-channel signal switching matrix is used to complete the discrete frequency points of each channel Signal selection; the signal control unit performs the processing and state control of the IF signal received by Satcom and the multi-channel interference signal. By adopting the multi-input multi-output switching scheme and the multi-frequency point feeding clock scheme, the present invention can provide multi-frequency points and multi-frequency points in the Ku and Ka dual-frequency bands when the existing Ku and Ka dual-band satellite communication ground stations are interfered. Channel interference signal synchronization reception, sampling and processing capabilities.
以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的精神和范围。The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced. Without departing from the spirit and scope of the technical solutions of the present invention.
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