Abstract:

Digital technique for wideband channelized receivers for electronic war (EW) is studied, a new method using polyphase filters is employed to optimize normal channelized receivers based on the short time Fourier transform (STFT). The first step of this method is decimating time-domain data, then applies fast Fourier transform (FFT) to the decimated data and weights the transformed results. The realized process of the method on FPGA is discussed. The theoretical analysis and the experiment using real application receiver show the new receiver can achieve more channel than the normal receiver  under the condition of the same FPGA resource.