Application Research Of Software Radio In The Base-band System Of Remote Control And Telemetry

Remote Control and Telemetry system is developing toward standardization and generalization. Traditionally, the system was constructed all by the hardware, which was designed for the specifical function and can not share the resource.This kind of system can hardly meet the requirements of development. The software radio which booms recently can resolve this problem favourably. The characters of software radio lies in that the functions of the system can be defined by the software independently. You can change the functions of the system only by modifying the software, without changing the structure of the hardware at all.This paper puts forward the scheme of applying software radio in the system of Remote Control and Telemetry. The application in base-band of this system which based on the universal platform of FPGA had been realised. Firstly, deep research of the basic theory about software radio and the Remote Control and Telemetry system had been done. Based on this, a sheme about the realization of the QPSK modem was placed. Secondly, the whole system feasibility was modeled and simulated by MATLAB/Simulink. In the end, based on the universal platform of FPGA and the language of Verilog HDL, the key modules were built. This paper realized the key modules of the base-band of the Telemetry and Telecomm system. These modules were comprised of the realization of FEC, the shape of base-band wave, interpolation, synchronization and decode of Viterbi. All the design of these modules can be simulated under the simulation environment of ISE and Modelsim.