基于GNURadio的CMA盲均衡器和锁相环组合设计与实现  

Design and implementation of CMA blind equalizer and PLL based on GNURadio

作　　者：李晓光 潘克刚 Li Xiaoguang;Pan Kegang(School of Communication Engineering,The Army Engineering University of PLA,Nanjing 210007,China)

机构地区：[1]中国人民解放军陆军工程大学通信工程学院,江苏南京210007

出　　处：《信息技术与网络安全》2018年第7期67-70,共4页Information Technology and Network Security

摘　　要：在分析Bussgang类恒模算法(Constant Modulus Algorithm,CMA)盲均衡基础上,使用改进型CMA结合二阶锁相环(PLL)的盲均衡方法,实现对MQAM(M=4,16,64)和MPSK(M=2,4,8)信号经过高斯噪声信道后发生的频率偏移和相位偏移的消除。组建了基于GNURadio和USRP软件无线电平台的CMA+PLL盲均衡处理模块。通过对MQAM和MPSK信号的测试,模块在噪声影响下对信号频率和相位偏移依然有良好的纠正性能,为使用软件无线电平台实时接收处理信号做好模块化验证。This paper is based on the analysis of Bussgang class blind equalization constant modulus algorithm（ CMA）. The blind equalization method based on the improved CMA and second-order phase-locked loop（ PLL） is used to realize the optimization of MQAM（ M = 4,16,64）and MPSK（ M = 2,4,8）,and to eliminat the distortion caused by the frequency offset and phase offset after the Gaussian noise channel. The CMA with PLL blind equalization processing module based on GNURadio and USRP software radio platform was established. Through testing the MQAM and MPSK signals,the module still has good performance in correcting the signal frequency and phase shift under the influence of noise. It is a modular verification for using the software radio platform to receive and process the real time signal.

关 键 词：盲均衡常模算法 二阶锁相环 GNURadio USRP 

分 类 号：TN919.34[电子电信—通信与信息系统]