基于UWB信号的变步长LMS算法的研究
首发时间:2010-06-23
摘要:本文分析了目前已提出的基于线性调频信号压缩体制的超宽带脉冲波形的设计方法,考虑到最小均方(LMS)自适应滤波在抗干扰中的广泛应用,以及变步长LMS算法具有简易、高效的特点,将变步长LMS算法与自适应滤波相结合,利用自适应滤波抑制干扰的方法,研究了它在超宽带接收信号中抑制干扰信号的作用。仿真结果表明变步长LMS自适应滤波能有效地抑制干扰信号。因此在超宽带信号中采用变步长LMS算法抑制干扰信号是可行的,它能提高UWB系统的性能。
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A Study Based on UWB Signal for Variable Step-size LMS
Abstract:This paper analyzes a proposed method for the design of the Impulse Radio (IR) UWB pulse waveform based on the Chirp Signals compression, taking into account that the least mean square (LMS) adaptive filtering is used widely, and the variable step size LMS algorithm is simple and efficient, combined the variable step size LMS algorithm and adaptive filtering, by means of the method of adaptive filtering Interference suppression, this paper has studied its suppression on interference signals of UWB signals. Simulation results show that the variable step size LMS adaptive filter can suppress the interference signals effectively. Therefore, it is feasible to suppress the interference signals by using Variable step size LMS algorithm in the UWB receiver, it can improve the performance of UWB systems.
Keywords: Chirp signal UWB NLMS adaptive filtering
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