三路带通混叠信号数字接收机设计  

Digital frontend design for three-bands aliasing RF signals

作　　者：王洪梅[1] 姚冲 王法广[1] 李世银[1] 宋金玲[1] Wang Hongmei;Yao Chong;Wang Faguang;Li Shiyin;Song Jinling(School of Information and Control Engineering,China University of Mining and Technology,Xuzhou 221200,China)

机构地区：[1]中国矿业大学信息与控制学院

出　　处：《电子技术应用》2019年第8期95-98,103,共5页Application of Electronic Technique

基　　金：国家自然科学基金项目(61601464,61771474)

摘　　要：为解决三路带通信号混叠问题,提出了一种延时可调的三阶带通采样结构,通过设计数字抗混叠滤波器,可实现对三路带通信号的无混叠接收。给出了仿真实现结果,并对信号进行重构,分析了抗混叠性能,三路带通信号经过抗混叠滤波器后,信号输出信噪比可在28dB以上。该方法解决了带通采样中多信号混叠问题,增加了采样频率选择范围,可以减少硬件负担,提高了软件无线电的灵活性。In order to solve the problem of three-band bandpass signal aliasing, a delay-adjustable third-order bandpass sampling structure is proposed. By designing a digital anti-aliasing filter, the alias-free reception of three-band bandpass signals can be realized. The simulation results are given, the signal is reconstructed and the anti-aliasing performance is analyzed. After the three-passband signal passes through the anti-aliasing filter, the signal output signal-to-noise ratio can be above 28 dB. This method solves the bandpass. The multi-signal aliasing problem in sampling increases the sampling frequency selection range, which reduces the hardware burden and improves the flexibility of the software radio.

关 键 词：带通采样 多带通信号 数字接收机 抗混叠 

分 类 号：TN911.72[电子电信—通信与信息系统]