The Design And Implementation Of Software Radio Communication Platform Based On FPGA

As a new communications technology, software radio's basic idea is to construct a common hardware platform, make the broadband A/D, D/A close to antenna as possible, and complete signal processing in the digital domain. It can achieve different communications functions by selecting different software modules, so it can greatly shorten the designing cycle of the radio. There are urgent needs in the communication areas(especially in mobile communications) and it has broad prospects.This paper discussed the signal sampling theory, multi-rate signal processing technology, efficient digital filter, and digital orthogonal theory. With the current development level and the experimental conditions, this paper discussed a software platform for radio communication based on FPGA. It used a digital IF processing hardware platform structure, chose Altera Cyclone series of FPGA as signal processing and overall controlling core, combined with dedicated communications chips, digital up-converter AD9856 and digital down-converter AD6654. It used VHDL and Verilog HDL language as a programming language for modular design, and designed a lot of useful communication module, such as TDMA module, channel codec module, modem module. It also discussed the actual circuit board design, system configuration and Control, passive filter design, impedance matching circuit design in detail. It also compeleted the circuit board to test and debug, and achieved the desired results.This design can greatly simplify the digital communication system's hardware devices, and improve its versatility and flexibility. Through the revision of the system parameters and configuration process, it can adapt to different communication modes and channel conditions, and it fully embodies the software radio's advantage. The platform can not only be used in communications equipment, but also in many authentication system platform, testing equipment, and it has a certain value.