Wideband digital channelized receiver design

The digital receiver should possess the ability to process a large number of data in real-time for the wideband signal.A new kind of efficient digital channelized receiver is proposed in this paper which is based on polyphase filters and short-time FFT technology(polyphase fast Fourier transform).It can detect objects and measure parameters for the wideband signal in real-time.A digital receiver system with a 640MHz instantaneous bandwidth is built based on the structure proposed using FPGA and DSP devices.It has high accuracy of time-frequency parameter measurement and low data output ratio,which shows the structure is feasible.