Design and Low Complexity Implementation of FRM-Based OMFB With STB
Wenxu Zhang, Zhennan Wu, Zhongkai Zhao, Feiran Liu · IEEE Transactions on Circuits & Systems II Express Briefs · 2022
Due to limited hardware resources, multi-channel digital channelizers often use a 50% overlapping wide transition bandwidth in array signal processing. In this brief, we proposed an oversampled modulated filter bank (OMFB) with sharp transition bandwidth (STB) based on frequency response masking (FRM). The FRM approach is used to design and optimize the prototype filter with STB. The design process and fast implementation based on Xilinx System Generator of the proposed FRM-based OMFB with STB is presented. The proposed FRM-based OMFB with STB has the advantages of low complexity, which is suitable for high sampling rate system. Compared with conventional polyphase filter bank for digital channelizer, the proposed FRM-based OMFB with STB can offer 81.14% reduction in multipliers complexity.