一种变步长NLMS自适应判决反馈均衡器  

New Variable Step Size NLMS Adaptive Decision Feedback Equalization

作　　者：陈晓挺[1,2] 赵国栋[1,2] 金萍[1,2] 刘会杰[1,2] 梁旭文[1,2] 

机构地区：[1]上海微小卫星工程中心,上海200050 [2]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《系统仿真学报》2009年第9期2666-2669,共4页Journal of System Simulation

摘　　要：判决反馈均衡器因其性能明显优于线性均衡器而得到了广泛的应用。提出了一种新的变步长NLMS算法,进一步改善了判决反馈均衡器的性能。这种算法考虑了接收机和均衡器的联合设计,把接收信噪比引入到变步长算法中,使均衡器在不影响接收机误码率性能的基础上,尽量提高收敛速度和增大动态范围。Decision feedback equalization （DFE） was widely used for its performance, which was better than linear equalization （LE）. A new variable step size （VSS） NLMS algorithm was proposed to improve the DFE performance. This algorithm considers the co-designs of the receiver and the DFE, and brings the SNR into setting of the step size. It chiefly ensures the bits error rate （BER） performance of the receiver with the DFE, and then shortens convergence time and enlarges the dynamic range of the adaptive DFE as far as possible.

关 键 词：均衡 判决反馈 变步长 误码率 

分 类 号：TN911[电子电信—通信与信息系统]