基于开关矩阵的卫星通信测控站多路频谱监测系统设计

Design of Multi-channel Spectrum Monitoring System for Satellite Communication Observation and Control Station Based on Switch Matrix

摘要:

针对目前人工监测方法受到干扰信号影响而导致监测精准度低的问题，提出了基于开关矩阵的卫星通信测控站多路频谱监测系统设计。设计监测系统总体结构，通过接入基带上行中频信号，获取遥控信号频谱，采用USB接口将计算机与频谱分析仪连接，实现频谱分析器下的四个下行载波信号分时显示，利用串行EEPROM器件，内集成总线为双线串行进行数据传输，选用MAX3232芯片进行电平转换，运用视窗2000作为载体，实现PC机与频谱仪之间交互，分析发射信号、传输信号延时时间和其对应的时间差，利用开关矩阵控制干扰信号，设计基于开关矩阵的多路频谱监测系统软件流程，实现多路频谱监测控制。实验结果表明，该系统监测信号强度与实际值偏差较小，监测精准度较高，能够实现卫星通信信号高效监测。

Abstract:

Aiming at the problem that the current manual monitoring method is affected by the interference signal and the monitoring accuracy is low, the design of a multi-channel spectrum monitoring system for satellite communication measurement and control station based on the switch matrix is proposed. Design the overall structure of the monitoring system, obtain the remote control signal spectrum by accessing the baseband uplink intermediate frequency signal, and use the USB interface to connect the computer with the spectrum analyzer to realize the time-sharing display of the four downlink carrier signals under the spectrum analyzer. Using serial EEPROM devices, the internal integrated bus is two-wire serial for data transmission, MAX3232 chip is selected for level conversion, and Windows 2000 is used as the carrier to realize the interaction between PC and spectrum analyzer. Analyze the transmission signal, the delay time of the transmission signal and the corresponding time difference, use the switch matrix to control the interference signal, and design the software process of the multi-channel spectrum monitoring system based on the switch matrix to realize the multi-channel spectrum monitoring control. The experimental results show that the system has a small deviation between the monitoring signal strength and the actual value, and the monitoring accuracy is high, which can realize the efficient monitoring of satellite communication signals.