自适应盲均衡信道的设计与实现  

Design and implementation of adaptive blind equalization channel

作　　者：操礼长 王小雨 谢学东 王小旗 韩菁 CAO Lichang;WANG Xiaoyu;XIE Xuedong;Wang Xiaoqi;Han Jing(Xi'an Satellite Control Center,Xi'an 710043,China;Nanjing Agricultural University,Nanjing 210095,China;Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安卫星测控中心,西安710043 [2]南京农业大学,南京210095 [3]西安理工大学,西安710048

出　　处：《遥测遥控》2023年第1期43-47,共5页Journal of Telemetry,Tracking and Command

摘　　要：针对星地高速遥感传输信道中客观存在的码间串扰、信道不确定性等情况,提出采用双模式自适应盲均衡方法,综合了CMA(Constant Modulus Agorithm,恒模算法)均衡器的高稳健性以及LMS(Least Mean Square,最小均方算法)均衡器的高精度等优势。方法在均衡初期,利用CMA均衡器实现快速收敛;在MSE(Mean Square Error,均方误差)较小时切换为LMS均衡器,完成高精度收敛,实现了星地高速传输信道失真信号的快速高精度校正。Aiming at the inter-symbol interference(ISI)and channel uncertainty in satellite-to-ground high-speed remote sensing transmission channel,a dual-mode adaptive blind equalization method is proposed,combine the advantages of high robustness of CMA equalizer and high precision of LMS equalizer.At the beginning of equalization,CMA equalizer is used to realize fast convergence,and when MSE is small,LMS equalizer is used to achieve high precision convergence.

关 键 词：星地高速遥感数据传输 自适应均衡 盲均衡 分数间隔均衡器 

分 类 号：TN911.5[电子电信—通信与信息系统]