Design of Reconfigurable Uniform Digital Filter Banks based on Coefficient Decimation Method_Review

Abstract

With the technologies of wireless communication like cognitive radio (CR), analysis filter banks (FBs) are used to adopt two crucial tasks; channelization followed by spectrum sensing. The channelizer is used to obtain separate channels from the wideband digital input signal at different intervals of time. The three main requirements in the channelizer are reconfigurability, low complexity and flexibility. The coefficient decimation technique for reconfigurable FIR filters was recently discussed as a filter structure with low computational complexity. In this brief, the most important types of FBs based on Coefficient Decimation Method (CDM) that used in a nonuniform channelization with comparison among them based on their multiplication complexities and their flexibilities, are discussed. General Terms Digital Signal Processing, Finite Impulse Response Filters.