Efficient digital channelized receiver based on subband decomposition and DFT filter banks

Abstract

An efficient digital channelized receiver based on subband decomposition and DFT filter banks is proposed for wideband signals interception. The proposed channelized receiver, which consists of a subband decomposition section, an analysis section and a synthesis section, is capable of extracting channels of nonuniform bandwidths corresponding to multiple different signals from the digitized wideband input signal, especially when a large number of channels are extracted. The proposed architecture is less complex and can offer reconfiguration compared with conventional approaches. The computational complexity of the proposed channelized receiver is reduced significantly due to the implementation of the polyphase filter bank decomposition, and therefore the proposed architecture can be easily realized. Theory analysis and simulation results verify the validity of the new method.