脉冲噪声下数字调制信号自适应解调.pdf

: 脉冲噪声下数字调制信号的自适应解调 付柏成, 赵知劲, 赵治栋 ( 3 10018) : 提出基于自适应滤波解调稳定分布脉冲噪声下的常规 字调制信号的方法采用归一化最小平均p 范 自 适应滤波算法的自适应滤波器, 跟踪信号任 一码元间隔内的单 一频率, 根据自适应滤波器权值的收敛值可以解调相应的码 元计算机仿真结果表明, 此自适应滤波解调方法性能优越, 抗脉冲干扰强, 同时算法计算速度快, 易于实现, 具有很好的实 用价值 : 稳定分布; 字调制信号; 自适应解调; 归一化最小平均p 范 算法 : T N9 11 72 : B : 100437 3X( 2008) 230 1005 Adaptive Demodulation Method for Digital Modulated Signals under Pulse Noise F U Baicheng, ZH AO Zhi in, ZH AO Zhidong ( T elecomm unication Schoo l, H ang zho u Dianzi Univer sit y, H ang zho u, 3100 18, China) Abstract: A new adaptive demo dulation method fo r general dig ital mo dulated sig nals( M PSK , M F SK and M QA M ) under st able distr ibut ion pulse no ise is pr oposed. T o t rack single fr equency of any code inter val of sig nals and to demodulate these signals, the no rmalized least mean pno rm adaptiv e f ilter ing alg or ithm is u sed . T he simulatio n results indicate that the per form ance of this adaptive demodulatio n metho d is pr edom inant and it can mitig at e pulse interf er ence. T his adaptiv e demodulation metho d is robu st , f ast and easy to implement . Keyw ords: stable dist ribution ; dig ita l modulated signal; ada ptive demo dulation ; mo rmalized least mean pnor m alg or ithm , 1 , p ( No rmalized [ 4] , L east Mean pNorm ) , ( M PSK , M FSK M QA M ) [ 1, 2] ( , , A DEM ) , ,