Robust adaptive interference rejection in DS/FH hybrid system
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摘要: 根据鲁棒估计理论,采用一种基于广义M估计的自适应滤波器消除DS/FH混合扩频系统中的部分带宽干扰,并推导了鲁棒自适应算法.比较了2种M估计中常用的ψ函数的性能:Huber函数(Huber function)、三权重函数(Tri-weight function).Monte Carlo 仿真结果表明,采用鲁棒自适应滤波器的DS/FH系统抗非稳态干扰性能显著提高,且具有拒绝特性的三权重函数性能明显优于Huber函数.Abstract: According to robust estimator theory, an adaptive filter based on generalized M estimation was used to reject partial band interference in DS/FH hybrid communication system, and the robust adaptive algorithm was deduced. The performance of two M estimation functions (Huber function and Tri-weight function) which are widely used in M estimation was also compared. Monte Carlo simulation results indicate that the performance of DS/FH system using robust adaptive filter is improved remarkably in nonstationary interference environment ,and the performance of Tri-weight function excels the Huber function's obviously.
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