Abstract
There has been extensive discussions on the performance of the LMS algorithm in nonstationary environment. In some instances its performance in such environments has been compared with that of other adaptive algorithms. However, most existing works treated in this respect focus on narrowband channels. In this paper, we investigate the performance of the LMS, NLMS and LMF algorithms in tracking time-varying ultra wideband (UWB) channels. Channel measurements were conducted for an indoor environment and the resultant channel impulse response is used in the analysis. The results show that the LMF and NLMS algorithms outperform the LMS algorithm in time-varying UWB channels with the NLMS providing the best performance.
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