CN1753327A - Antenna Configuration Method for Highway Wireless Coverage - Google Patents

Abstract

This invention relates to an antenna configuration method for highway wireless cover, which applies a directional antenna to carry out inverted direction wireless cover to process the up and down signals of the directional antenna according to the same area to merge the signals by the directional antenna applying the inverted direction cover in terms of the main diversity way in the process of the up signals, in the process of down signals, the signals are divided into two completely the same signals to be sent out via the directional antenna applying the inverted direction cover to increase the gain of the antenna.

Description

Translated fromChinese

用于公路无线覆盖的天线配置方法Antenna Configuration Method for Highway Wireless Coverage

技术领域technical field

本发明涉及一种天线配置方法，尤其涉及一种用于公路覆盖的天线配置方法。The invention relates to an antenna configuration method, in particular to an antenna configuration method for highway coverage.

背景技术Background technique

在无线通信系统中，公路无线覆盖是一种比较特殊的应用。在普通环境应用中，一般要求无线覆盖的区域接近于圆形，而公路无线覆盖的区域是狭窄的长条形，如图1所示，还要求沿着公路的覆盖区域尽可能的长，与公路垂直方向的覆盖则要求不高。In wireless communication systems, road wireless coverage is a special application. In ordinary environment applications, the wireless coverage area is generally required to be close to a circle, while the road wireless coverage area is a narrow strip, as shown in Figure 1, and the coverage area along the road is also required to be as long as possible, and The coverage in the vertical direction of the road is less demanding.

由于公路无线覆盖要求的特殊性，在现有技术中进行公路无线覆盖主要采用两种方法，方法一是采用若干个全向天线或八字型天线进行无线覆盖。全向天线的无线覆盖区域示意图如图2所示，八字型天线的无线覆盖区域与定向天线类似，只是该天线增益较小，相应覆盖范围小。全向天线或八字型天线的覆盖区域接近于圆形，由于公路无线覆盖的区域是狭窄的长条形，要求沿着公路的无线覆盖区域尽可能的长，与公路垂直方向的无线覆盖则要求不高。因此在采用全向天线或八字型天线进行公路无线覆盖时所使用的天线数量较多，导致天线的利用率不高，有一定的资源浪费。Due to the particularity of road wireless coverage requirements, there are mainly two methods for road wireless coverage in the prior art. The first method is to use several omnidirectional antennas or figure-of-eight antennas for wireless coverage. The schematic diagram of the wireless coverage area of the omnidirectional antenna is shown in Figure 2. The wireless coverage area of the figure-of-eight antenna is similar to that of the directional antenna, except that the gain of the antenna is small and the corresponding coverage area is small. The coverage area of an omnidirectional antenna or a figure-eight antenna is close to a circle. Since the road wireless coverage area is narrow and long, the wireless coverage area along the road is required to be as long as possible, and the wireless coverage in the direction perpendicular to the road requires not tall. Therefore, when omnidirectional antennas or figure-of-eight antennas are used for road wireless coverage, the number of antennas used is large, resulting in low utilization of antennas and a certain waste of resources.

方法二是利用两个定向天线进行相反方向的无线覆盖，两个天线分属不同的小区。两个方向相反的定向天线覆盖示意图如图3所示，由于两个天线分属不同的小区，用户从一个天线覆盖区域进入另一个天线覆盖区域时，必须进行信号切换，当用户到达小区边界时，由于原小区基站与新小区基站的载波频率不同，移动台必须在接收新基站的信号之前，中断与原基站的通信，公路上用户的移动速度比较快，当用户迅速脱离原来的小区进入一个新的小区时，新的小区可能来不及为用户分配通话信道，这时就会发通话过程中掉话现象，导致切换失败。The second method is to use two directional antennas to perform wireless coverage in opposite directions, and the two antennas belong to different cells. The schematic diagram of the coverage of two directional antennas with opposite directions is shown in Figure 3. Since the two antennas belong to different cells, when the user enters the coverage area of one antenna from the coverage area of another antenna, signal switching must be performed. When the user reaches the cell boundary , because the base station of the original cell and the base station of the new cell have different carrier frequencies, the mobile station must interrupt the communication with the original base station before receiving the signal of the new base station, and the mobile speed of the user on the road is relatively fast. When a new cell is installed, the new cell may not have time to allocate a call channel for the user, and at this time, a call drop phenomenon will occur during the call, resulting in handover failure.

发明内容Contents of the invention

本发明要解决的技术问题在于提供一种用于公路无线覆盖的天线配置方法。该方法针对公路无线覆盖的特点，提供了尽可能大的覆盖范围，同时避免由于切换而引起的通话掉话。The technical problem to be solved by the present invention is to provide an antenna configuration method for road wireless coverage. According to the characteristics of highway wireless coverage, the method provides the largest coverage area possible, and at the same time avoids call drop caused by switching.

为解决上述技术问题，本发明提供一种用于公路无线覆盖的天线配置方法，采用定向天线进行相反方向无线覆盖，包括：1)将采用相反方向覆盖的定向天线接收的上行信号按照主分集方式进行合并处理；2)将下行信号分离成两个完全相同的信号，从采用相反方向覆盖的定向天线发送出去。In order to solve the above technical problems, the present invention provides an antenna configuration method for road wireless coverage, using directional antennas for wireless coverage in the opposite direction, including: 1) Uplink signals received by the directional antennas covered in the opposite direction according to the main diversity mode performing merging processing; 2) separating the downlink signal into two completely identical signals, and sending them out from directional antennas covering in opposite directions.

步骤1)所述相反方向覆盖的定向天线的覆盖范围部分重叠。所述采用相反方向覆盖的定向天线为两个或者所述采用相反方向覆盖的定向天线为四个，将其中两个天线分为一组，使其指向一个方向，另外两个天线分为一组，使其指向相反方向。Step 1) The coverage areas of the directional antennas covering in opposite directions partially overlap. The number of directional antennas covering in opposite directions is two or the number of directional antennas covering in opposite directions is four, and two of the antennas are divided into one group so that they point in one direction, and the other two antennas are divided into one group , so that it points in the opposite direction.

所述步骤1)具体包括步骤：11)定向天线将接收到的信号通过双工器送入上行射频处理单元进行射频处理；12)射频处理单元输出的信号采用主分集合并方式输入同一个上行基带处理单元；13)上行基带处理单元进行信号的搜索、解调处理，按照信噪比进行信号合并，将合并后的信号送给后级进行相应处理。The step 1) specifically includes the steps: 11) the directional antenna sends the received signal to the uplink radio frequency processing unit through the duplexer for radio frequency processing; 12) the signal output by the radio frequency processing unit is input into the same uplink baseband in the main diversity combining mode Processing unit; 13) The uplink baseband processing unit performs signal search and demodulation processing, performs signal combination according to the signal-to-noise ratio, and sends the combined signal to a subsequent stage for corresponding processing.

步骤2)所述信号分离在基带处理过程中完成或在射频处理过程中完成。Step 2) The signal separation is completed in the baseband processing process or in the radio frequency processing process.

所述信号分离的过程具体包括：21)下行信号经过下行基带处理后被送入可编程逻辑器件接口；22)所述下行可编程逻辑器件接口将信号分离成完全相同的两份，分别送给第一下行射频处理单元和第二下行射频处理单元；23)所述第一、第二下行射频处理单元分别进行信号的射频处理，并将处理后的信号通过双工器发送到属于同一小区的定向天线上发射出去。The process of signal separation specifically includes: 21) the downlink signal is sent to the programmable logic device interface after being processed by the downlink baseband; 22) the downlink programmable logic device interface separates the signal into two identical parts and sends them to The first downlink radio frequency processing unit and the second downlink radio frequency processing unit; 23) The first and second downlink radio frequency processing units respectively perform radio frequency processing of signals, and send the processed signals to the same cell through a duplexer radiated from a directional antenna.

所述信号分离的过程具体包括：31)进行下行信号的基带处理，并将处理后的信号送给下行射频处理单元；32)进行下行信号的射频处理，并将处理后的信号送给功分器；33)所述功分器将射频处理后的射频信号分成两份，分别发送给双工器，通过所述双工器送至天线发射出去。The process of signal separation specifically includes: 31) performing baseband processing of the downlink signal, and sending the processed signal to the downlink radio frequency processing unit; 32) performing radio frequency processing of the downlink signal, and sending the processed signal to the power divider 33) The power splitter divides the radio frequency signal processed by the radio frequency into two parts, sends them to the duplexer respectively, and transmits it to the antenna through the duplexer.

与现有技术相比，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:

本发明由于采用了定向天线进行相反方向的无线覆盖，与全向天线相比，天线增益比较大，覆盖范围提高，同时由于将相反方向覆盖的定向天线的上下行信号按照同一小区来处理，避免了小区间切换时容易发生的掉话现象。Because the present invention adopts the directional antenna to carry out wireless coverage in the opposite direction, compared with the omnidirectional antenna, the antenna gain is relatively large, and the coverage area is improved. This eliminates the call drop phenomenon that is likely to occur when switching between cells.

附图说明Description of drawings

图1为公路无线覆盖区域示意图；Fig. 1 is a schematic diagram of highway wireless coverage area;

图2为全向天线的无线覆盖区域示意图；FIG. 2 is a schematic diagram of a wireless coverage area of an omnidirectional antenna;

图3两个定向天线进行相反方向无线覆盖时的覆盖区域示意图；Figure 3 is a schematic diagram of the coverage area when two directional antennas perform wireless coverage in opposite directions;

图4为本发明在基带处理过程中进行下行和上行信号处理的原理框图；Fig. 4 is a functional block diagram of downlink and uplink signal processing in the baseband processing process of the present invention;

图5为本发明在射频处理过程中进行下行和上行信号处理的原理框图；Fig. 5 is a functional block diagram of downlink and uplink signal processing in the radio frequency processing process of the present invention;

图6为本发明所述方法的流程图。Fig. 6 is a flowchart of the method of the present invention.

具体实施方式Detailed ways

为了在长条状的区域范围内进行有效的无线覆盖，本发明在现有技术二的基础上进行了改进。由于两个方向相反的定向天线的覆盖范围分属于不同的小区，因此在小区切换时容易可能导致切换失败。据此，本发明采用两个定向天线进行反方向无线覆盖，保证两个定向天线的覆盖方向上相差接近180度，同时，将上下行信号处理按照同一个小区对待。在下行信号处理中，将信号分离成两个完全相同的信号，从两个天线发送出去；在上行信号处理中，将两个天线的信号按照主分集方式进行合并处理。主分集方式合并指的是：将两个天线的信号中的任何一个指定为主集，另一个作为分集，通过对两个信号的强度或信噪比的比例合并相加成一个信号，送到后级处理，主分集方式合并通常也称作分集合并。In order to provide effective wireless coverage within the strip-shaped area, the present invention improves on the basis of the second prior art. Since the coverage areas of the two directional antennas with opposite directions belong to different cells, it is easy to cause handover failure during cell handover. Accordingly, the present invention uses two directional antennas for wireless coverage in the opposite direction, ensuring that the difference in the coverage directions of the two directional antennas is close to 180 degrees, and at the same time, the uplink and downlink signal processing is treated as the same cell. In the downlink signal processing, the signal is separated into two identical signals and sent out from the two antennas; in the uplink signal processing, the signals of the two antennas are combined and processed in the main diversity mode. The combination of the main diversity mode refers to: designate any one of the signals of the two antennas as the main set, and the other as the diversity set, and combine the strength or signal-to-noise ratio of the two signals into one signal, and send it to Post-processing, the main diversity combination is usually also called diversity combination.

具体说，本发明所述方法包括三个主要的步骤，参考图6。步骤1，进行天线设置，对条状覆盖区设置相反方向覆盖的定向天线，使所述反向设置的天线覆盖区域分布在一个条状带上；步骤2和步骤3是信号的处理步骤；其中，步骤2将采用相反方向覆盖的定向天线接收的上行信号按照主分集方式进行合并处理；步骤3将下行信号分离成两个完全相同的信号，从采用相反方向覆盖的定向天线发送出去。通过所述步骤2、3，实现了将定向天线进行相反方向覆盖以及将定向天线的上下行信号处理按照同一个小区来处理的需求。Specifically, the method of the present invention includes three main steps, refer to FIG. 6 .Step 1, carry out antenna setting, set the directional antenna covered in the opposite direction to the strip coverage area, so that the antenna coverage area set in the opposite direction is distributed on a strip; Step 2 and Step 3 are signal processing steps; wherein , step 2 combines the uplink signals received by the directional antennas covering in opposite directions according to the main diversity method; step 3 separates the downlink signals into two identical signals, and sends them out from the directional antennas covering in opposite directions. Through the above steps 2 and 3, the requirements of covering the directional antenna in opposite directions and processing the uplink and downlink signals of the directional antenna according to the same cell are realized.

由于定向天线的方向性，会在反向设置的天线无线覆盖的条状区域带上产生覆盖盲点，即在两个方向天线的无线覆盖交合区域的覆盖面积较小，可能影响实际的通信效果，因此，在步骤1具体进行天线设置时，应使所述相反方向覆盖的定向天线的覆盖范围部分重叠，从而消除所述覆盖盲区。Due to the directivity of the directional antenna, coverage blind spots will be generated on the strip area covered by the antenna wireless coverage set in the opposite direction, that is, the coverage area of the intersection area of the wireless coverage of the antennas in two directions is small, which may affect the actual communication effect. Therefore, when setting up the antennas instep 1, the coverage areas of the directional antennas covering in opposite directions should be partially overlapped, so as to eliminate the coverage blind spots.

上下行信号处理按照同一个小区对待，因此用户从两个定向天线中的一个天线的覆盖区进入另一个天线覆盖区时，在下行信号处理中，下行接收的信号虽然来自不同的天线，但由于信号完全相同，不需要进行切换，保持了下行信号在空间上的连续性。在上行信号处理中，由于用户大部分时间都在某一个天线的覆盖区，另一个天线接收不到用户的信号，当用户从一个天线的覆盖区进入另一个天线覆盖区时，两个天线同时接收到用户的信号，由于对两个天线的信号采用主分集合并方式，任何一个天线有信号，都可以保证上行业务的正常处理；同时由于上下行处理都按照同一个小区来对待，避免了由于切换而造成的掉话。Uplink and downlink signal processing is treated as the same cell, so when a user enters the coverage area of another antenna from the coverage area of one of the two directional antennas, in the downlink signal processing, although the downlink received signals come from different antennas, due to The signals are exactly the same, no switching is required, and the spatial continuity of the downlink signal is maintained. In the uplink signal processing, since the user is in the coverage area of one antenna most of the time, the other antenna cannot receive the user's signal. When the user enters the coverage area of another antenna from the coverage area of one antenna, the two antennas simultaneously When the user's signal is received, since the signal of the two antennas is combined in the main diversity mode, any antenna with a signal can ensure the normal processing of the uplink business; Call drop caused by switching.

在本发明的两天线接收处理中，只需要将两个天线的朝向设置成相反的方向，基站接收信号不需要作特殊处理，按照两天线接收分集处理即可。在上行信号处理过程中，由于用户大部分时间都在某一个天线的覆盖区，另一个天线接收不到用户的信号，因此绝大部分时间用户的信号只在一个天线上存在，没有了两天线接收的处理增益问题。在下行信号处理过程中，本发明将下行信号分离成两个完全一样的信号，分别从两个天线发射出去，确保手机可以在两个天线的覆盖范围内收到同样的信号。In the two-antenna receiving process of the present invention, it is only necessary to set the orientations of the two antennas to be opposite directions, and the base station does not need to perform special processing on receiving signals, and only needs to be processed according to the receiving diversity of the two antennas. In the process of uplink signal processing, since the user is in the coverage area of a certain antenna most of the time, the other antenna cannot receive the user's signal, so the user's signal only exists on one antenna most of the time, and there are no two antennas. Receive processing gain issues. In the downlink signal processing process, the present invention separates the downlink signal into two identical signals, which are transmitted from the two antennas respectively, so as to ensure that the mobile phone can receive the same signal within the coverage of the two antennas.

本发明在下行信号分离处理过程中，可以采用在基带处理中进行信号分离或者在射频处理中进行信号分离，可以根据应用和成本采用不同的实现方式，下面分别对两种处理方式进行说明。In the downlink signal separation process of the present invention, signal separation in baseband processing or signal separation in radio frequency processing can be adopted, and different implementation methods can be adopted according to application and cost. The two processing methods will be described respectively below.

在基带处理中进行信号分离时，需要将相应的信号复制成完全相同的两份，分别送给不同的射频通道，两个射频通道分别对信号进行处理，送给天线发射出去，这种处理方式需要两个射频处理单元，成本相对较高，但可以保证发射的信号功率。在基带处理中进行信号分离的过程一般是由FPGA(可编程逻辑器件)接口实现。When performing signal separation in baseband processing, it is necessary to copy the corresponding signal into two identical copies and send them to different RF channels. The two RF channels process the signals separately and send them to the antenna for transmission. This processing method Two radio frequency processing units are required, and the cost is relatively high, but the transmitted signal power can be guaranteed. The process of signal separation in baseband processing is generally implemented by an FPGA (Programmable Logic Device) interface.

图4所示为在基带处理过程中进行下行和上行信号处理的原理框图。Figure 4 shows a functional block diagram of downlink and uplink signal processing during baseband processing.

在图4中的下行信号处理过程中，信号经过下行基带处理后，下行的FPGA接口将信号分离成完全相同的两份，分别送给两个不同的下行射频处理单元，由两个不同的下行射频处理单元分别进行射频处理后，信号通过双工器被发送到了属于同一小区的两个定向天线上，由两个定向天线分别发射出去。In the downlink signal processing process in Figure 4, after the signal is processed by the downlink baseband, the downlink FPGA interface separates the signal into two identical parts, which are sent to two different downlink radio frequency processing units respectively. After the radio frequency processing unit performs radio frequency processing respectively, the signal is sent to the two directional antennas belonging to the same cell through the duplexer, and is transmitted by the two directional antennas respectively.

在图4中的上行信号处理过程中，两个定向天线接收到的信号通过各自的双工器送入各自的上行射频处理单元，两个上行射频处理单元分别对接收到的信号进行射频处理后，采用主分集合并方式将信号送入上行基带处理单元，经过搜索、解调处理，按照信噪比将信号合并为一个后，送给后级进行相应处理。In the uplink signal processing process in Figure 4, the signals received by the two directional antennas are sent to their respective uplink radio frequency processing units through their respective duplexers, and the two uplink radio frequency processing units respectively perform radio frequency processing on the received signals , the signal is sent to the uplink baseband processing unit by means of main diversity combination, after searching and demodulation processing, the signal is combined into one according to the signal-to-noise ratio, and then sent to the subsequent stage for corresponding processing.

在射频处理单元处进行信号分离时，基带处不需要进行特殊处理，只需要一个射频处理单元，信号经过射频处理后，通过功分器，将射频信号分成两份，分别送给两个天线发射出去，这样处理可以节省成本，但由于一个射频处理单元的额定功率是固定的，信号被分成两份后，每个天线的功率输出比上述在基带处理中进行信号分离方式中减少一半，相应的无线覆盖距离也会减少。When signal separation is performed at the RF processing unit, no special processing is required at the baseband, and only one RF processing unit is required. After the signal is processed by RF, the RF signal is divided into two parts by a power divider and sent to two antennas for transmission. This way of processing can save costs, but since the rated power of a radio frequency processing unit is fixed, after the signal is divided into two parts, the power output of each antenna is reduced by half compared with the above-mentioned method of signal separation in baseband processing, and the corresponding The wireless coverage distance will also be reduced.

图5所示为在射频部分进行下行和上行信号处理的原理框图。Figure 5 shows a functional block diagram of downlink and uplink signal processing in the radio frequency section.

图5中的下行信号经过下行基带处理后，送给下行射频处理单元，经过射频处理单元处理后，信号送给功分器，功分器将射频处理单元输出的射频信号分成两份，分别发送给双工器，通过双工器送至天线发射出去，由于一个射频处理单元的额定功率是固定的，信号被分成两份后，每个天线的功率输出比上述在基带处理中进行信号分离方式中减少一半，相应的无线覆盖距离也会减少。The downlink signal in Figure 5 is sent to the downlink radio frequency processing unit after the downlink baseband processing, after being processed by the radio frequency processing unit, the signal is sent to the power divider, and the power divider divides the radio frequency signal output by the radio frequency processing unit into two parts, and sends them separately It is sent to the duplexer and transmitted to the antenna through the duplexer. Since the rated power of a radio frequency processing unit is fixed, after the signal is divided into two parts, the power output of each antenna is higher than the signal separation method in the baseband processing mentioned above. If it is reduced by half, the corresponding wireless coverage distance will also be reduced.

图5中的上行信号的处理过程与在基带处理过程中的上行信号处理方式相同，两个定向天线接收到的信号通过各自的双工器送入各自的上行射频处理单元，两个上行射频处理单元分别对接收到的信号进行射频处理后，采用主分集合并方式将信号送入上行基带处理单元，经过搜索、解调处理，按照信噪比将信号合并为一个后，送给后级进行相应处理。The processing process of the uplink signal in Figure 5 is the same as the uplink signal processing method in the baseband processing process. The signals received by the two directional antennas are sent to the respective uplink radio frequency processing units through their respective duplexers, and the two uplink radio frequency processing units After the unit performs radio frequency processing on the received signal, the signal is sent to the uplink baseband processing unit by means of main diversity combination. After searching and demodulation processing, the signal is combined into one according to the signal-to-noise ratio, and then sent to the subsequent stage for corresponding processing. deal with.

在每个方向还分别可以采用两天线通过分集提高增益。In each direction, two antennas can also be used to increase the gain through diversity.

CDMA系统具有支持更软切换的功能，所谓更软切换，对上行而言，指的是基站同时接收两个上行信号，并在基带处理中，将两个信号按照信噪比合并为一个信号，由于基站对一个信号的处理通常采用两天线方式，因此将两个信号合并，意味着基站能够支持将四个天线的信号合并处理，这样就可以将两个天线分为一组，使其指向一个方向，另外两个天线分为一组，使其指向另外一个方向。The CDMA system has the function of supporting softer handover. The so-called softer handover refers to the fact that the base station receives two uplink signals at the same time, and in the baseband processing, combines the two signals into one signal according to the signal-to-noise ratio. Since the base station usually uses two antennas to process a signal, combining the two signals means that the base station can support the combined processing of the signals of four antennas, so that the two antennas can be divided into one group and point to one direction, the other two antennas are grouped so that they point in the other direction.

在上行信号处理过程中，同时对四个天线的信号进行合并处理，由于用户信号会同时出现在两个天线上，上行处理会有分集增益，提高了上行接收灵敏度，进而提高上行无线覆盖范围；During the uplink signal processing, the signals of the four antennas are combined and processed at the same time. Since the user signal will appear on the two antennas at the same time, the uplink processing will have diversity gain, which improves the uplink receiving sensitivity and thus improves the uplink wireless coverage;

在下行信号处理过程中，在每一组天线中任选一个发送下行信号即可，另外一个天线不发送信号。In the process of downlink signal processing, it is only necessary to select one antenna in each group to transmit the downlink signal, and the other antenna does not transmit the signal.

以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (9)

1, a kind of antenna allocation method that is used for the highway wireless coverage adopts directional antenna to carry out the rightabout wireless coverage, it is characterized in that comprising:

1) will adopt the upward signal of the directional antenna reception of rightabout covering to merge processing according to main diversity mode;

2) downstream signal is separated into two identical signals, sends from the directional antenna that adopts rightabout to cover.

2, the antenna allocation method that is used for the highway wireless coverage according to claim 1 is characterized in that, the coverage of the directional antenna that the described rightabout of step 1) covers is overlapped.

3, the antenna allocation method that is used for the highway wireless coverage according to claim 1 is characterized in that, described step 1) specifically comprises step:

11) directional antenna is sent into up RF processing unit with the signal that receives by duplexer and is carried out radio frequency processing;

12) signal of RF processing unit output adopts main diversity merging mode to import same uplink baseband processing unit;

13) the uplink baseband processing unit carries out search, the demodulation process of signal, carries out signal according to signal to noise ratio and merges, and gives the back level with the signal after merging and carries out respective handling.

4, according to claim 1, the 2 or 3 described antenna allocation methods that are used for the highway wireless coverage, it is characterized in that: step 2) described Signal Separation finishes in the Base-Band Processing process.

5, according to claim 1, the 2 or 3 described antenna allocation methods that are used for the highway wireless coverage, it is characterized in that: step 2) described Signal Separation finishes in the radio frequency processing process.

6, the antenna allocation method that is used for the highway wireless coverage according to claim 4 is characterized in that, the process of described Signal Separation specifically comprises:

21) downstream signal is admitted to the programmable logic device interface after handling through downgoing baseband;

22) described descending programmable logic device interface separates the signal into identical two parts, gives the first downlink radio frequency processing unit and the second downlink radio frequency processing unit respectively;

23) described first, second downlink radio frequency processing unit carries out the radio frequency processing of signal respectively, and the signal after will handling sends on the directional antenna that belongs to same sub-district by duplexer and launches.

7, the antenna allocation method that is used for the highway wireless coverage according to claim 5 is characterized in that, the process of described Signal Separation specifically comprises:

31) carry out the Base-Band Processing of downstream signal, and the signal after will handling is given the downlink radio frequency processing unit;

32) carry out the radio frequency processing of downstream signal, and the signal after will handling is given power splitter;

33) radiofrequency signal of described power splitter after with radio frequency processing is divided into two parts, sends to duplexer respectively, delivers to antenna by described duplexer and launches.

8, the antenna allocation method that is used for the highway wireless coverage according to claim 1 is characterized in that: the directional antenna that described employing rightabout covers is two.

9, the antenna allocation method that is used for the highway wireless coverage according to claim 1, it is characterized in that: the directional antenna that described employing rightabout covers is four, wherein two antennas are divided into one group, make it point to a direction, two other antenna is divided into one group, makes its directed in opposite directions.

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