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多径信道的自适应估计

DOI: 10.13190/jbupt.200604.36.wangdy, PP. 36-40

Keywords: 迭代型最小均方噪声抑制算法,代价函数,遗忘因子,Kalman增益,自回归模型

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Abstract:

为了对降低迭代型最小均方噪声抑制(RLM)算法的复杂度,本文对脉冲噪声抑制函数??(?)的进行了改进,并通过理论分析证明了改进后的算法仍然满足线性方程关系。同时还对脉冲噪声抑制函数??(?)中的关键阈值参数???与?进行了估计,并将改进后的RLM算法应用于对时变快衰信道冲激响应矢量的估计中。仿真结果显示,相比于标准的迭代型最小均方(RLS)算法,改进后的RLM算法抗大脉冲干扰的能力增强,可以在出现大脉冲干扰的情况下使信道冲激响应矢量快速收敛。

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