Optimal Algorithm Of Digital Channel Digital Down Conversion

The software radio (SWR) is a new developing technology with the progress of micro-electronics technique in recent years. This thesis deals with the research of Software Radio technique. Then it expatiates on the Digital Down Converter. Basing on investigate of this, it use a new project of the best digital channel by use system view.This paper firstly introduces the structure of the software radio, including the principle of sample, the principle of the multi-rate digital processing,that is decimate and interpolate,and the CIC,HB,FIR digital filter. Secondly it introduces the principle of Digital Down Converter .Based on this,it introduce the design of a new project of the best digital channel,that of better design of CIC,HB, and FIR filter.Finally,it implements the simulation of Digital Down Converte by using system view. The design of each simulation module is explained and the result of simulation is analyzed.