Research And Implementation Of Key Technologies Of Satellite TV Signal Multichannel Monitoring Receiver

Satellite radio and television earth station is a special satellite earth station for radio and television satellite transmission,which is of great significance for information transmission and national security.Monitoring satellite TV signal in real time can improve its accuracy and effectiveness.In response to the application needs of multi-channel parallel monitoring of radio and television earth stations,The digital multi-channel parallel monitoring receiver combines the advantages of digitalization and channelization,integrates the great comprehensive performance of the two in bandwidth range,dynamic range and other indicators,and has the advantages of small size and low power consumption,It can realize multi-channel parallel monitoring of satellite TV signal.According to the characteristics of satellite TV signal,the main work of this paper is to study the theoretical algorithm of multichannel parallel monitoring receiver and the realization based on the specific hardware platform.The research contents are as follows:1.Research on the satellite TV signal multichannel monitoring receiver through the polyphase filtering channelization algorithm,according to its mathematical model,deduce the parallel multichannel algorithm structure based on polyphase filter bank,and use MATLAB to simulate the multichannel algorithm.2.Introduce the frequency response masking technology to solve the problem of mutual interference between subchannels caused by channel division and overlapping in multi-channel parallel monitoring receiver and reduce the consumption of hardware resources by reducing the transition of sub-band filter banks.Study the dynamic channelization technology,and design a comprehensive filter group to complete the cross channel signal reconstruction,in order to solve the cross channel problem of wideband TV signal.3.Implement the multi-channel monitoring receiver engineering,complete the overall scheme of the multi-channel monitoring receiver system and the hardware circuit design of the data acquisition board,mainly including the design of clock module,power module and ADC module based on the FMC data acquisition board,and realize the high-speed data transmission between the data acquisition board and the signal processing platform by using the JESD204 b high-speed transmission bus transmission protocol.In the end,carry out relevant performance test and analysis.