Tree Structure for Channelized Digital Receivers

A new structure to build channelized receivers is proposed in this paper. Channelization is always achieved once time in conventional structure. But in the proposed structure, it is realized step by step with a tree filterbank. Basic unit of the filterbank is composed of symmetrical halfband filters. The filterbank is computationally efficient since half of the filter coefficients are zeros. Polyphase decomposition makes it more efficient because two symmetrical halfband filters are shared and one of the polyphase filters become a constant. The structure is not only used in uniform channelization, but also suitable for nonuniform channelization with basic units substituted by delay units