电讯技术2025，Vol.65Issue(11)：1937-1943,7.DOI:10.20079/j.issn.1001-893x.240420001
多频段混叠信号接收滤波器设计
Design of a Multi-band Alias Signal Receiving Filter
摘要
Abstract
To solve the problem of signal aliasing after sampling in software defined radio(SDR),an improved phase-adjusted filtering algorithm is proposed.Based on the second-order RF bandpass sampling front-end with adjustable time delay,an anti-aliasing filter that supports multi-segment filtering is designed,and multiple frequency segments can be flexibly set according to the actual needs,so as to achieve accurate filtering for different frequency bands.Through the simulation verification in MATLAB SIMULINK,the method has better suppression performance than similar filters(38 dB or more),and can effectively filter out the required signal without affecting the integrity of other signals,which simplifies the receiving front-end,has strong flexibility and adaptability,and can better support future communication technology and high-density communication connections.关键词
软件无线电(SDR)/滤波器设计/二阶带通采样/相位调整滤波/信号重构Key words
software defined radio(SDR)/filter design/second-order bandpass sampling/phase-adjusted filtering/signal reconstruction分类
电子信息工程引用本文复制引用
王洪梅,王隽泽,李世银,王法广,刘朔..多频段混叠信号接收滤波器设计[J].电讯技术,2025,65(11):1937-1943,7.基金项目
国家自然科学基金面上项目(62371451) （62371451）
