泄漏LMS对啁啾信号的跟踪性能

L. Ting, C. Cowan, Roger Francis Woods, P. R. Cork, C. L. Sprigings
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引用次数: 2

摘要

LMS滤波器的初始频率通频带保持不变,同时跟踪非平稳啁啾信号。这种过去记忆效应导致不需要的白噪声通过自适应滤波器的初始残余通带泄漏。在LMS算法中加入泄漏项,消除了跟踪滤波器的记忆效应,降低了自适应滤波器输出端的噪声功率。与标准LMS算法相比,这种降低的噪声功率反映在低信噪比啁啾信号的提高信噪比(信噪比)上。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Tracking performance of leakage LMS for chirped signals
The initial frequency pass-band of the LMS filter remains whilst tracking a non-stationary chirped signal. This past memory effect causes unwanted white noise to leak through the initial residual pass-band of the adaptive filter. A leakage term is applied to the LMS algorithm to remove the memory effect of the tracking filter which leads to a reduction in the noise power at the output of the adaptive filter. This reduced noise power is reflected in an improved SNR (signal-to-noise ratio) of a low SNR chirped signal compared to the standard LMS algorithm.
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