For this purpose,this paper first analyzes the improved algorithm of complex polyphase filters and its mathematical module,which meet the requirement of receiving signals without leaking.

Analysis of quadrature processor based on the polyphase filters and channelized receiver with polyphase filter - banks;

The mathematical model of channelized receiver based on polyphase filters is analyzed and discussed by using multi-rate signal processing theory.

Based on the construction of polyphase filter,this paper puts forward a method to adopt multiplex parallel multiplier,which raises the data flow rates and the data bandwidth,finally gives the simulation results.

According to detailed analyzing to characteristics of poly-phase filter,a method to solve down-conversion of high speed data flow is provided,and implementation of this method is achieved based on field programmable gate array(FPGA).

The whole mixer comprises three poly-phase filters,one Local Oscilator(LO) buffer amplifier,four core cells of Gilbert mixer.

A design method and structural implementation of wideband digital channelized receiver based on poly-phase filters is introduced.

It is a good method that implements multi-channel by multi-phase filter.

In order to fulfil the audio mixing of the decoded MPEG-I Layer-II bitstreamsin real time in the digital audio workstation, an algorithm is proposed for fast real time mixing of MPEG-I Layer-II audio bitstreams after analyzing the kernel algorithm of the polyphase filters in MPEG I decoder.