关键词: 频率响应屏蔽, 加权叠加结构, 动态信道化, 原型滤波器, 重构

Abstract: Due to the problem of high complexity of prototype filter design in weighted overlap-add (WOLA) filter bank dynamic channelization structure, this paper introduces frequency response masking (FRM) into the dynamic channelization structure, and proposes a WOLA filter bank dynamic channelization structure based on FRM. In this structure, first of all, FRM technology is enhanced, and a new FRM is proposed to design a filter with complementary power features. Secondly, the filter designed by FRM is used as the prototype filter of WOLA filter bank dynamic structure. Lastly, the channels overlap to reduce signal distortion due to the blind zone. The simulation results show that this structure can realize dynamic signal reception and has a good reconstruction effect. Moreover, compared with the prototype filter designed directly to meet the reconstruction characteristics, the FRM design filter saves 79% of multiplier resources.

Key words: frequency response masking, weighted overlap-add structure, dynamic channelization, prototype filter, reconstruction