CN103442461B - Electrically tunable antenna modulation-demodulation communication system - Google Patents
Electrically tunable antenna modulation-demodulation communication system Download PDFInfo
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Abstract
本发明公开了一种电调天线调制解调通信系统，包括多个电调天线调制解调控制装置，并且多个电调天线调制解调控制装置通过同轴天馈线电缆相连接，所述的每个电调天线调制解调控制装置均包括复合信号控制电路和同轴信号传输连接腔体组件，并且复信号控制电路和同轴信号传输连接腔体组件相连接以实现数据双向传输。本发明能够实现对直流电源信号、电调天线控制信号和电调天线射频信号的有效复合，射频频谱带宽645MHz—2700MHz，并兼容现有2G和3G移动通信频谱资源，真正降低移动通信基站建设的成本和提高移动通信基站电调天线控制的可靠性。
The invention discloses a modulation and demodulation communication system for electric antennas, which includes multiple modulation and demodulation control devices for electric antennas, and the multiple modulation and demodulation control devices for electric antennas are connected through coaxial antenna feeder cables. Each electric antenna modulation and demodulation control device includes a composite signal control circuit and a coaxial signal transmission connection cavity assembly, and the complex signal control circuit is connected with the coaxial signal transmission connection cavity assembly to realize bidirectional data transmission. The invention can realize the effective compounding of the DC power signal, the control signal of the electronically adjustable antenna and the radio frequency signal of the electronically adjustable antenna, and the bandwidth of the radio frequency spectrum is 645MHz-2700MHz, and is compatible with the existing 2G and 3G mobile communication spectrum resources, and truly reduces the construction cost of the mobile communication base station cost and improve the reliability of the electric adjustable antenna control of the mobile communication base station.
Description
技术领域technical field
本发明涉及一种电调天线调制解调通信系统，属于通信传输与控制技术领域。The invention relates to an electronically adjustable antenna modulation and demodulation communication system, which belongs to the technical field of communication transmission and control.
背景技术Background technique
目前，随着移动通信技术的日新月异，数据通信与多媒体业务需求的发展，为更好地适应移动数据业务、移动计算及移动多媒体业务需求，移动通信技术开始向着第四代移动通信技术(4G)开始兴起。而所有技术的发展与更替都不可能在一夜之间实现和完成，从第一代模拟通信技术到第二代数字移动通信：(2G)技术GSM、GPRS，再到第三代移动通信(3G)技术：WCDMA、CDMA2000、TD-SCDMA，以及再到下一代移动通信技术：WiMAX、LTE，需要不断演进，而且这些技术可以同时存在。鉴于移动通信网络的技术特点，为了给用户提供清晰流畅的话音和高速可靠的数据业务与多媒体业务，运营商要能提供通信网络实时优化和网络动态调整、以减少多元化业务动态流量造成的呼吸效应的网络服务，同时能减少相互干扰的产生。因此，由于电调移动天线在提高系统容量和抗干扰的优势，以及在通信网络动态调整的便捷性和人力成本上的节省，使得其在移动通信网络建设上被大量采用。At present, with the rapid development of mobile communication technology and the development of data communication and multimedia service requirements, in order to better meet the needs of mobile data services, mobile computing and mobile multimedia services, mobile communication technology has begun to move towards the fourth generation mobile communication technology (4G) start to rise. The development and replacement of all technologies cannot be realized and completed overnight, from the first generation of analog communication technology to the second generation of digital mobile communication: (2G) technology GSM, GPRS, and then to the third generation of mobile communication (3G) ) Technology: WCDMA, CDMA2000, TD-SCDMA, and then to the next generation of mobile communication technology: WiMAX, LTE, need to evolve continuously, and these technologies can exist at the same time. In view of the technical characteristics of mobile communication networks, in order to provide users with clear and smooth voice and high-speed and reliable data services and multimedia services, operators must be able to provide real-time optimization of communication networks and dynamic network adjustments to reduce breathing caused by dynamic traffic of diversified services Effective network services, while reducing the generation of mutual interference. Therefore, due to the advantages of improving system capacity and anti-interference, as well as the convenience of dynamic adjustment of the communication network and the saving of labor costs, the electronically adjustable mobile antenna has been widely used in the construction of mobile communication networks.
现移动通信基站天线系统是通过独立的馈线电缆来传输射频信号，另一电缆单独传递远程电调移动天线控制信号，这样在基站建设时同一电调天线系统就需要用馈线电缆和控制电缆两根电缆来进行天线系统的信号控制与射频传输，增加了移动通信系统的建设成本，造成施工成本与维护难度的加大，且存在一定维护安全隐患。The current mobile communication base station antenna system transmits radio frequency signals through an independent feeder cable, and another cable transmits the control signal of the remote electric adjustable mobile antenna separately. In this way, the same electric adjustable antenna system needs to use two feeder cables and control cables during base station construction. Cables are used for signal control and radio frequency transmission of the antenna system, which increases the construction cost of the mobile communication system, increases the construction cost and maintenance difficulty, and has certain maintenance safety hazards.
发明内容Contents of the invention
本发明所要解决的技术问题是克服现有技术的缺陷，提供一种电调天线调制解调通信系统，它能够实现对直流电源信号、电调天线控制信号和电调天线射频信号的有效复合，并兼容现有2G和3G移动通信频谱资源，真正降低移动通信基站建设的成本和提高移动通信基站电调天线控制的可靠性。The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an electronically adjustable antenna modulation and demodulation communication system, which can realize the effective compounding of the DC power signal, the electronically adjustable antenna control signal and the electronically adjustable antenna radio frequency signal, It is also compatible with existing 2G and 3G mobile communication spectrum resources, truly reducing the cost of mobile communication base station construction and improving the reliability of mobile communication base station electric antenna control.
本发明解决上述技术问题采取的技术方案是：一种电调天线调制解调通信系统，包括多个电调天线调制解调控制装置，并且多个电调天线调制解调控制装置通过同轴天馈线电缆相连接，所述的每个电调天线调制解调控制装置均包括复合信号控制电路和同轴信号传输连接腔体组件，并且复合信号控制电路和同轴信号传输连接腔体组件相连接以实现数据双向传输；其中，所述复合信号控制电路，用于接收电调天线控制信号后并调制和滤波处理以及接收直流电源信号，并将它们复合为低频复合信号；所述同轴信号传输连接腔体组件，用于接收电调天线射频信号和接收复合信号控制电路所传递的低频复合信号，并将它们复合为射频复合信号传递给同轴天馈线电缆；所述同轴信号传输连接腔体组件，还用于接收同轴天馈线电缆所传递的射频复合信号并将其分离出电调天线射频信号后输出和分离出低频复合信号后传递给复合信号控制电路；所述复合信号控制电路，还用于将低频复合信号分离出直流电源信号后处理输出以及分离出电调天线射频信号并滤波和解调后输出。The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an electronically adjustable antenna modulation and demodulation communication system, including multiple electronically adjustable antenna modulation and demodulation control devices, and multiple electronically adjustable antenna modulation and demodulation control devices The feeder cables are connected, and each of the electric-tunable antenna modulation and demodulation control devices includes a composite signal control circuit and a coaxial signal transmission connection cavity assembly, and the composite signal control circuit is connected to the coaxial signal transmission connection cavity assembly In order to realize two-way transmission of data; wherein, the composite signal control circuit is used to receive the control signal of the electric adjustable antenna, modulate and filter the signal, receive the DC power signal, and composite them into a low-frequency composite signal; the coaxial signal transmission The connecting cavity assembly is used to receive the radio frequency signal of the electronically adjustable antenna and the low-frequency composite signal transmitted by the composite signal control circuit, and combine them into a radio frequency composite signal and transmit it to the coaxial antenna feeder cable; the coaxial signal transmission connection cavity The body assembly is also used to receive the radio frequency composite signal transmitted by the coaxial antenna feeder cable and separate it from the radio frequency signal of the electric adjustable antenna, output and separate the low frequency composite signal and then pass it to the composite signal control circuit; the composite signal control circuit , It is also used to separate the low-frequency composite signal from the DC power signal and output it after processing, and to separate the radio frequency signal of the electronically adjustable antenna and output it after filtering and demodulation.
进一步，所述的复合信号控制电路包括信号收发控制电路、窄带通滤波网络电路、信号输入输出控制电路和调制解调控制电路以及用于处理直流电源信号的电源传输控制电路，信号输入输出控制电路分别与电源传输控制电路、窄带通滤波网络电路和所述的同轴信号传输连接腔体组件相连接以实现数据双向传输，调制解调控制电路与窄带通滤波网络电路相连接以实现数据双向传输，所述的信号收发控制电路的控制信号输出端分别与调制解调控制电路、窄带通滤波网络电路和信号输入输出控制电路相连接；其中，所述调制解调控制电路，用于根据信号收发控制电路的相应控制命令对电调天线控制信号进行调制解调；所述窄带通滤波网络电路，用于根据信号收发控制电路的相应控制命令对电调天线控制信号进行滤波处理；所述信号输入输出控制电路，用于根据信号收发控制电路的相应控制命令接收电源传输控制电路处理后的直流电源信号和接收经过调制和滤波后的电调天线控制信号，并将它们复合为低频复合信号后传递给同轴信号传输连接腔体组件；所述信号输入输出控制电路，还用于根据信号收发控制电路的相应控制命令接收同轴信号传输连接腔体组件所传递的低频复合信号，并将其分离出直流电源信号后传递给电源传输控制电路和分离出未解调电调天线控制信号传递给窄带通滤波网络电路。Further, the composite signal control circuit includes a signal transceiving control circuit, a narrow bandpass filter network circuit, a signal input and output control circuit, a modulation and demodulation control circuit, and a power transmission control circuit for processing DC power signals, and a signal input and output control circuit The power transmission control circuit, the narrow band-pass filter network circuit and the coaxial signal transmission connection cavity assembly are respectively connected to realize two-way data transmission, and the modulation and demodulation control circuit is connected to the narrow-band pass filter network circuit to realize two-way data transmission , the control signal output end of the signal transceiving control circuit is respectively connected with the modulation and demodulation control circuit, the narrow bandpass filter network circuit and the signal input and output control circuit; wherein, the modulation and demodulation control circuit is used for transmitting and receiving according to the signal The corresponding control command of the control circuit modulates and demodulates the control signal of the electric adjustable antenna; the narrow bandpass filter network circuit is used to filter the control signal of the electronic adjustable antenna according to the corresponding control command of the signal sending and receiving control circuit; the signal input The output control circuit is used to receive the DC power signal processed by the power transmission control circuit and the modulated and filtered electric antenna control signal according to the corresponding control command of the signal transceiver control circuit, and combine them into low-frequency composite signals for transmission The coaxial signal transmission is connected to the cavity assembly; the signal input and output control circuit is also used to receive and separate the low-frequency composite signal transmitted by the coaxial signal transmission connection cavity assembly according to the corresponding control command of the signal transceiver control circuit After the DC power signal is output, it is transmitted to the power transmission control circuit and the un-demodulated electric antenna control signal is separated and transmitted to the narrow band-pass filter network circuit.
进一步，所述的同轴信号传输连接腔体组件包括射频复合信号连接件、传输腔体构件、传输同轴构件以及用于接收和输出电调天线射频信号的电调天线射频信号连接件，射频复合信号连接件与所述同轴天馈线电缆相连接，射频复合信号连接件和电调天线射频信号连接件均连接在传输腔体构件和传输同轴构件上。Further, the coaxial signal transmission connection cavity assembly includes a radio frequency composite signal connector, a transmission cavity component, a transmission coaxial component, and an electronically adjustable antenna radio frequency signal connector for receiving and outputting radio frequency signals of the electronically adjustable antenna. The composite signal connector is connected to the coaxial antenna feeder cable, and the radio frequency composite signal connector and the radio frequency signal connector of the electric adjustable antenna are both connected to the transmission cavity member and the transmission coaxial member.
更进一步，所述的同轴信号传输连接腔体组件支持传输的射频频谱带宽645MHz—2700MHz，兼容现有2G和3G移动通信频谱和下一代4G-LTE通信频谱资源。Furthermore, the coaxial signal transmission connection cavity assembly supports transmission of radio frequency spectrum bandwidth of 645MHz-2700MHz, and is compatible with existing 2G and 3G mobile communication spectrum and next-generation 4G-LTE communication spectrum resources.
采用了上述技术方案后，调制解调控制电路在信号收发控制电路控制下，根据检测电调天线控制信号AISG数据的数率自动对其调整并进行调制后，经120KHz带宽（中心频率2.176MHz）的窄带通滤波网络电路进行信号处理送入信号输入输出控制电路；直流电源信号经电源传输控制电路处理后，在信号输入输出控制电路中进行低频信号复合，再通过传输腔体构件和传输同轴构件与电调天线射频信号进行射频信号复合后，通过射频复合信号连接件传输至单根同轴天馈线电缆中，完成信号的复合操作。同理，射频复合信号由射频复合信号连接件引入，经传输腔体构件和传输同轴构件分离出电调天线射频信号和低频复合信号，电调天线射频信号则由电调天线射频信号连接件输出，而低频复合信号则在信号输入输出控制电路由信号收发控制电路控制作用下，进行分离出直流电源信号和未解调电调天线控制信号，未解调电调天线控制信号经窄带通滤波网络电路滤波后，在信号收发控制电路控制调制解调控制电路作用下，解调出传输来的电调天线控制信号，完成信号的复合逆向操作，实现电调天线控制信号CF、直流电源信号DC和天线射频信号RF的透明传输，这样一方面实现了下一代通信技术LTE射频频谱与GSM和WCDMA/CDMA200/TD-SCDMA射频频谱相兼容；另一方面，降低了电调天线施工成本和施工难度，提高了天线系统控制的可扩展性，使用安全快捷、工作性能稳定可靠，适用于通信中各类移动天线的远程监测与控制场合。After adopting the above-mentioned technical scheme, the modulation and demodulation control circuit is under the control of the signal transmission and reception control circuit, and automatically adjusts and modulates it according to the data rate of the detected electric control antenna control signal AISG data. The narrow band-pass filter network circuit performs signal processing and sends it to the signal input and output control circuit; after the DC power signal is processed by the power transmission control circuit, the low frequency signal is recombined in the signal input and output control circuit, and then passes through the transmission cavity component and the transmission coaxial After the component and the radio frequency signal of the electronically adjustable antenna are compounded, they are transmitted to a single coaxial antenna feeder cable through the radio frequency composite signal connector to complete the signal compounding operation. In the same way, the RF composite signal is introduced by the RF composite signal connector, and the RF signal and the low-frequency composite signal of the electronically adjustable antenna are separated through the transmission cavity component and the transmission coaxial component, and the RF signal of the electronically adjustable antenna is transmitted by the RF signal connector of the electronically adjustable antenna. Output, while the low-frequency composite signal is separated from the DC power supply signal and the un-demodulated electric-tuned antenna control signal under the control of the signal input and output control circuit by the signal transceiver control circuit. The un-demodulated electric-tuned antenna control signal is filtered by a narrow bandpass After filtering by the network circuit, under the action of the signal transceiver control circuit to control the modulation and demodulation control circuit, the transmitted electric antenna control signal is demodulated, and the compound reverse operation of the signal is completed, and the electric antenna control signal CF and the DC power signal DC are realized. And the transparent transmission of antenna radio frequency signal RF, so that on the one hand, the next generation communication technology LTE radio frequency spectrum is compatible with GSM and WCDMA/CDMA200/TD-SCDMA radio frequency spectrum; on the other hand, it reduces the construction cost and construction difficulty of the electric adjustable antenna , which improves the scalability of the antenna system control, is safe and quick to use, and has stable and reliable working performance. It is suitable for remote monitoring and control of various mobile antennas in communications.
附图说明Description of drawings
图1为本发明的电调天线调制解调通信系统的结构示意图；Fig. 1 is the structure schematic diagram of the modulation and demodulation communication system of electric antenna of the present invention;
图2为本发明的电调天线调制解调控制装置的原理结构框图。Fig. 2 is a block diagram of the principle structure of the modulation and demodulation control device of the electric adjustable antenna according to the present invention.
具体实施方式detailed description
为了使本发明的内容更容易被清楚地理解，下面根据具体实施例并结合附图，对本发明作进一步详细的说明。In order to make the content of the present invention more clearly understood, the present invention will be further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.
如图1所示，一种电调天线调制解调通信系统，包括多个电调天线调制解调控制装置，并且多个电调天线调制解调控制装置通过同轴天馈线电缆相连接，每个电调天线调制解调控制装置均包括复合信号控制电路和同轴信号传输连接腔体组件，并且复合信号控制电路和同轴信号传输连接腔体组件相连接以实现数据双向传输；其中，As shown in Fig. 1, an electronically adjustable antenna modulation and demodulation communication system includes multiple electronically adjustable antenna modulation and demodulation control devices, and the multiple electronically adjustable antenna modulation and demodulation control devices are connected through coaxial antenna feeder cables, each Each electronically adjustable antenna modulation and demodulation control device includes a composite signal control circuit and a coaxial signal transmission connection cavity assembly, and the composite signal control circuit is connected to the coaxial signal transmission connection cavity assembly to realize bidirectional data transmission; wherein,
复合信号控制电路，用于接收电调天线控制信号后并调制和滤波处理以及接收直流电源信号，并将它们复合为低频复合信号；Composite signal control circuit, used for modulation and filtering processing after receiving the control signal of the electric adjustable antenna, receiving DC power signal, and compositing them into a low-frequency composite signal;
同轴信号传输连接腔体组件，用于接收电调天线射频信号和接收复合信号控制电路所传递的低频复合信号，并将它们复合为射频复合信号传递给同轴天馈线电缆；The coaxial signal transmission connection cavity assembly is used to receive the radio frequency signal of the electric adjustable antenna and the low frequency composite signal transmitted by the composite signal control circuit, and composite them into a radio frequency composite signal and transmit it to the coaxial antenna feeder cable;
同轴信号传输连接腔体组件，还用于接收同轴天馈线电缆所传递的射频复合信号并将其分离出电调天线射频信号后输出和分离出低频复合信号后传递给复合信号控制电路；The coaxial signal transmission connection cavity assembly is also used to receive the radio frequency composite signal transmitted by the coaxial antenna feeder cable and separate it from the radio frequency signal of the electric adjustable antenna, then output and separate the low frequency composite signal, and then pass it to the composite signal control circuit;
复合信号控制电路，还用于将低频复合信号分离出直流电源信号后处理输出以及分离出电调天线射频信号并滤波和解调后输出。The composite signal control circuit is also used to separate the low-frequency composite signal from the DC power signal for post-processing output, and to separate the radio frequency signal of the electronically adjustable antenna and output it after filtering and demodulating.
如图2所示，复合信号控制电路包括信号收发控制电路、窄带通滤波网络电路、信号输入输出控制电路和调制解调控制电路以及用于处理直流电源信号的电源传输控制电路，信号输入输出控制电路分别与电源传输控制电路、窄带通滤波网络电路和同轴信号传输连接腔体组件相连接以实现数据双向传输，调制解调控制电路与窄带通滤波网络电路相连接以实现数据双向传输，信号收发控制电路的控制信号输出端分别与调制解调控制电路、窄带通滤波网络电路和信号输入输出控制电路相连接；其中，As shown in Figure 2, the composite signal control circuit includes a signal transceiver control circuit, a narrow bandpass filter network circuit, a signal input and output control circuit, a modulation and demodulation control circuit, and a power transmission control circuit for processing DC power signals. The circuit is respectively connected with the power transmission control circuit, the narrow bandpass filter network circuit and the coaxial signal transmission connection cavity assembly to realize bidirectional data transmission, the modulation and demodulation control circuit is connected with the narrow bandpass filter network circuit to realize bidirectional data transmission, and the signal The control signal output terminals of the transceiver control circuit are respectively connected with the modulation and demodulation control circuit, the narrow bandpass filter network circuit and the signal input and output control circuit; wherein,
调制解调控制电路，用于根据信号收发控制电路的相应控制命令对电调天线控制信号进行调制解调；The modulation and demodulation control circuit is used to modulate and demodulate the control signal of the electronically adjustable antenna according to the corresponding control command of the signal sending and receiving control circuit;
窄带通滤波网络电路，用于根据信号收发控制电路的相应控制命令对电调天线控制信号进行滤波处理；A narrow band-pass filtering network circuit is used to filter the control signal of the electric adjustable antenna according to the corresponding control command of the signal sending and receiving control circuit;
信号输入输出控制电路，用于根据信号收发控制电路的相应控制命令接收电源传输控制电路处理后的直流电源信号和接收经过调制和滤波后的电调天线控制信号，并将它们复合为低频复合信号后传递给同轴信号传输连接腔体组件；The signal input and output control circuit is used to receive the DC power signal processed by the power transmission control circuit and the modulated and filtered electric antenna control signal according to the corresponding control command of the signal transceiver control circuit, and combine them into a low-frequency composite signal Afterwards, it is transmitted to the coaxial signal transmission connection cavity assembly;
信号输入输出控制电路，还用于根据信号收发控制电路的相应控制命令接收同轴信号传输连接腔体组件所传递的低频复合信号，并将其分离出直流电源信号后传递给电源传输控制电路和分离出未解调电调天线控制信号传递给窄带通滤波网络电路。The signal input and output control circuit is also used to receive the low-frequency composite signal transmitted by the coaxial signal transmission connection cavity assembly according to the corresponding control command of the signal transmission and reception control circuit, and separate the DC power signal from it and transmit it to the power transmission control circuit and The un-demodulated electric-tuned antenna control signal is separated and passed to the narrow band-pass filter network circuit.
如图2所示，同轴信号传输连接腔体组件包括射频复合信号连接件、传输腔体构件、传输同轴构件以及用于接收和输出电调天线射频信号的电调天线射频信号连接件，射频复合信号连接件与所述同轴天馈线电缆相连接，射频复合信号连接件和电调天线射频信号连接件均连接在传输腔体构件和传输同轴构件上。As shown in Figure 2, the coaxial signal transmission connection cavity assembly includes a radio frequency composite signal connector, a transmission cavity member, a transmission coaxial member, and an electronically adjustable antenna radio frequency signal connector for receiving and outputting radio frequency signals of the electronically adjustable antenna. The radio frequency composite signal connector is connected to the coaxial antenna feeder cable, and the radio frequency composite signal connector and the electric antenna radio frequency signal connector are both connected to the transmission cavity member and the transmission coaxial member.
同轴信号传输连接腔体组件支持传输的射频频谱带宽645MHz—2700MHz，兼容现有2G和3G移动通信频谱和下一代4G-LTE通信频谱资源。Coaxial signal transmission connection cavity components support transmission of radio frequency spectrum bandwidth of 645MHz-2700MHz, compatible with existing 2G and 3G mobile communication spectrum and next-generation 4G-LTE communication spectrum resources.
使用时，基站侧只需要将基站射频信号RF与电调天线射频信号连接件（射频信号端）连接，电调天线控制信号CF和直流电源信号DC均通过AISG标准接口连接，同轴天馈线电缆和射频复合信号连接件（天馈电缆端）连接；移动电调天线侧只需要将移动电调天线的射频信号RF与电调天线射频信号连接件（射频信号端）连接，通过AISG标准接口连接电调天线控制信号CF和直流电源信号DC，同轴天馈线电缆和射频复合信号连接件（天馈电缆端）连接；即可完成信号接口操作，实现各类信号的透明传输。When in use, the base station side only needs to connect the radio frequency signal RF of the base station to the radio frequency signal connector (radio frequency signal end) of the electronically adjustable antenna. The control signal CF of the electronically adjustable antenna and the DC power signal DC are connected through the AISG standard interface. Connect with the RF composite signal connector (antenna feeder cable end); on the side of the mobile ESC antenna, you only need to connect the RF signal RF of the mobile ESC antenna to the RF signal connector (RF signal end) of the ESC antenna, and connect through the AISG standard interface The electric control antenna control signal CF and the DC power signal DC are connected, and the coaxial antenna feeder cable is connected with the radio frequency composite signal connector (antenna cable end); the signal interface operation can be completed and the transparent transmission of various signals can be realized.
本发明的工作原理如下：The working principle of the present invention is as follows:
调制解调控制电路能够在信号收发控制电路的控制下，根据电调天线控制信号的数据传输速率进行调制或解调，通过窄带通滤波网络电路进行滤波处理，在信号收发控制电路控制下通过信号输入输出控制电路对电调天线控制信号与直流电源信号进行低频信号复合控制与输出功率调整，用于补偿外部电路与连接电缆损耗，保证足够大的信噪比，并经同轴信号传输连接腔体组件自动将低频复合信号加载到电调天线射频信号构成射频复合信号，利用单根同轴天馈线电缆进行射频复合信号的透明传输；The modulation and demodulation control circuit can modulate or demodulate according to the data transmission rate of the electric antenna control signal under the control of the signal transmission and reception control circuit, perform filtering processing through the narrow bandpass filter network circuit, and pass the signal under the control of the signal transmission and reception control circuit. The input and output control circuit performs low-frequency signal compound control and output power adjustment on the control signal of the electric adjustable antenna and the DC power signal, which is used to compensate the loss of the external circuit and the connecting cable to ensure a sufficient signal-to-noise ratio, and transmit the connection cavity through the coaxial signal. The body component automatically loads the low-frequency composite signal to the radio frequency signal of the electric adjustable antenna to form a radio frequency composite signal, and uses a single coaxial antenna feeder cable for transparent transmission of the radio frequency composite signal;
同理，同轴天馈线电缆传输的射频复合信号由射频复合信号连接件引入，经传输腔体构件和传输同轴构件分离出电调天线射频信号和低频复合信号，电调天线射频信号则由电调天线射频信号连接件输出，而低频复合信号则在信号输入输出控制电路由信号收发控制电路控制作用下，进行分离出直流电源信号和未解调电调天线控制信号，未解调电调天线控制信号经窄带通滤波网络电路滤波后，在信号收发控制电路控制调制解调控制电路作用下，解调出传输来的电调天线控制信号，完成信号的复合逆向操作，实现电调天线控制信号CF、直流电源信号DC和天线射频信号RF的透明传输。In the same way, the radio frequency composite signal transmitted by the coaxial antenna feeder cable is introduced by the radio frequency composite signal connector, and the radio frequency signal and the low frequency composite signal of the electronically adjustable antenna are separated through the transmission cavity component and the transmission coaxial component, and the radio frequency signal of the electronically adjustable antenna is obtained by The radio frequency signal connector of the electric-tuned antenna is output, while the low-frequency composite signal is controlled by the signal input and output control circuit by the signal transceiver control circuit to separate the DC power signal and the un-demodulated electric-tuned antenna control signal, and the un-demodulated electric-tuned antenna After the antenna control signal is filtered by the narrow band-pass filter network circuit, under the action of the signal transceiver control circuit to control the modulation and demodulation control circuit, the transmitted electric control antenna control signal is demodulated, and the complex reverse operation of the signal is completed to realize the control of the electric control antenna Transparent transmission of signal CF, direct current power signal DC and antenna radio frequency signal RF.
以上所述的具体实施例，对本发明解决的技术问题、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施例而已，并不用于限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The specific embodiments described above have further described the technical problems, technical solutions and beneficial effects solved by the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
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