基于Tansig函数的自适应同址干扰抵消算法  

A Tansig-based Variable Step-size LMS Algorithm for Adaptive Cosite Interference Cancellation

作　　者：雍明远 袁小刚[2] 陈旭[3] 

机构地区：[1]空军驻西北地区军事代表室,陕西西安710043 [2]空军工程大学电讯工程学院,陕西西安710077 [3]驻上海航天局八零二所军事代表室,上海200090

出　　处：《通信技术》2009年第2期306-308,共3页Communications Technology

基　　金：国家自然科学基金(60671001)。

摘　　要：针对跳频电台间同址干扰的特点―干扰强和射频干扰信号的时变特性,提出基于非线性Tansig函数的变步长LMS算法,给出其迭代公式并分析该算法性能。对该算法在自适应跳频同址干扰抵消中的性能进行仿真,仿真结果表明该算法对于非平稳强干扰系统具有很好的收敛速度、收敛精度和稳定性,且其计算量较小,能满足实时非平稳强干扰的自适应抵消的要求。A novel nonlinear variable step-size LMS adaptive filtering algorithm based on the Tansig function is presented. The cosite interference among FH radios is characterized by its strong signal and changing with time. Both the theoretical analysis and simulation on the adaptive strong interference cancellation in time-variable system indicate that this modified LMS algorithm has good properties of fast convergence speed and a small steady state error. The new variable step LMS algorithm is available for the real-time adaptive cosite interference cancellation.

关 键 词：自适应干扰抵消 最小均方算法 变步长 同址干扰 

分 类 号：TN911.4[电子电信—通信与信息系统]