Development Of MSD If-receiver Based On SDR

Telemetry system is used to complete remote measurement which sends the measurement parameters to the receivers.The receiving device demodulate and processes the data of tested equipment for the monitoring personnel to ensure the safety of equipment operation.Telemetry system is one of the important subsystems of a satellite,missile and other aircraft,it's also the important goals of flight test evaluation for the aircraft.The core of telemetry ground receiving system is high sensitivity receiver,which is used to receive and demodulate the data delivered from the aircraft correctly in the complex and harsh electromagnetic environment,to ensure that the flight mission data acquisition?With the development of aircraft flight test,new features of the receivers appear:1.There coexists new and old telemetry system,enhancing the pressure of upgrade of the ground security equipment;2.The ability of telemetry system and telecontrol system should be improved,but it's unable to meet the needs of anti-jamming to enhance the transmission power,which is used as the traditional means.As a popular means of communication technology in recent years,the software radio has become the main means of communication in various countries,especially in the military field.The combination of hardware and software is a wireless network and the user terminal with reconfigurable functions.As the same time,combined with the Turbo Product Code(TPC),can effectively enhance the receiver threshold of communication equipment,to meet the complex electromagnetic interference in the background of the communication needs.Based on the software radio technology,this paper studies the realization of the Multi-symbol Detection(MSD)IF receiver,the main work is as follows:(1)Algorithm simulation: algorithm simulation by the MATLAB simulation tool,including demodulation algorithm simulation,modulation algorithm simulation and TPC algorithm simulation.(2)Hardware circuit design: including device selection,functional circuit design and PCB design,etc.(3)Digital signal processing by FPGA code: FPGA code to complete the PCM-FM modulation and demodulation,TPC encoding and decoding,MSD algorithm.(4)Debugging and testing of software and hardware.