Simulation and Realization of Software Defined Radio Modulation and Demodulation System in SDR

In recent years, Software Defined Radio(SDR) is proposed as the important method for compatibility of the different communication system in the third generation mobile communication system and is payed close attention to by many country and institution. The modulation and demodulation module of high performance, high spectral efficiency is the key technology of the mobile communication system and its realization using software is an important link of realizing SDR.This paper mainly discusses the principle of one of the key modulation (demodulation) technologies of 16QAM in the future.It Carries on simulation with the dynamic system design, Simulation and analyses softwareU.S.A. ELANIX Company′s SystemView and analyses the simulation result. At the same time, after this paper is analyse the advantage of realizing SDR with FPGA, puts forward the method to use FPGA technology for achieving the 16QAM modulation and demodulation system.