Demodulation Of The Digital Receiver Based On Software Radio If Signal

Recent years ?as communications technology continues its rapid transition from analog to digital, more functions of contemporary radio systems are implemented in software - leading toward the software radio. A software radio is a radio whose channel modulation waveforms are defined in software. The part using software radio increases flexibility via increased programmability. And in part software radio represents an ideal consideration in radio architectures that seek to balance standards compatibility, technology insertion and the compelling economics of today's highly competitive marketplaces.This thesis expatiated on the fundamental and the frame of software radio, and mainly discusses the design and research of a software radio receiver .It introduces the hardware and software of the receiver in detailed. The receiver uses a PDC(programmable downconverter)of HSP50214B to transform the A/D output high speed signal into a low speed signal in order that a lower speed DSP can deal with . DSP output demodulation results are displaying in computer via Parallel Port which working in EPP mode. It can also operate many other types signal through the spectrum management.This thesis analyzes the AM and FM signal and give a actual realization of software radio receiver. It can become an perfect receiver through software optimized .