基于FRM的WOLA滤波器组动态信道化结构  

Dynamic Channelization Structure of WOLA Filter Banks Based on FRM

作　　者：朱政宇[1,2] 周宁 梁静[1] 王忠勇[1] 巩克现[1] ZHU Zhengyu;ZHOU Ning;LIANG Jing;WANG Zhongyong;GONG Kexian(School of Electrical and Information Engineering,Zhengzhou University,Zhengzhou,450001,China;National Mobile Communications Research Laboratory,Southeast University,Nanjing 210018,China)

机构地区：[1]郑州大学电气与信息工程学院,郑州450001 [2]东南大学移动通信国家重点实验室,南京210018

出　　处：《北京邮电大学学报》2024年第3期62-68,共7页Journal of Beijing University of Posts and Telecommunications

基　　金：中国博士后科学基金项目(2023T160596);河南省高校科技创新人才支持计划项目(23HASTIT019);河南省自然科学基金项目(232300421097);东南大学移动通信国家重点实验室项目(2023D11)。

摘　　要：针对加权叠加(WOLA)滤波器组动态信道化结构中原型滤波器设计复杂度较高的问题,将频率响应屏蔽技术(FRM)引入该动态信道化结构,并提出一种基于FRM的WOLA滤波器组动态信道化结构。在该结构中,首先对FRM技术进行改进,提出一种新型FRM,用于设计具有互补特性的滤波器;其次,将FRM设计的滤波器作为WOLA滤波器组动态信道化结构的原型滤波器;最后,使信道之间进行部分交叠,以减少盲区造成的信号失真。仿真实验结果表明,该结构能够实现信号的动态化接收,具有较好的重构效果,与直接设计满足重构特性的原型滤波器相比,FRM设计的滤波器节省了79%的乘法器资源。This paper introduces frequency response masking(FRM)and proposes a weighted overlap-add(WOLA)filter bank dynamic channelization structure based on FRM to address the issue of the high complexity of prototype filter design.Firstly,FRM technology is improved in this structure,and a new FRM is proposed to design a filter with complementary power features.Secondly,the FRM-designed filter serves as the WOLA filter bank dynamic structure's prototype filter.Additionally,the channels overlap to reduce signal distortion caused by the blind zone.The simulation results demonstrated that this structure enables dynamic signal reception and achieves a good reconstruction effect.Furthermore,compared to directly designing a prototype filter to meet the reconstruction characteristics,the FRM design filter saves 79%of multiplier resources.

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 

分 类 号：TN975[电子电信—信号与信息处理]