Summary
International Technical Conference on Circuits/Systems, Computers and Communications
2008
Session Number:F6
Session:
Number:F6-1
Method for Estimating Amount of Delay of Sparse Channel Based on Phase-Only Correlation
Atsushi Imamizu, Kiyoshi Nishikawa, Hitoshi Kiya,
pp.-
Publication Date:2008/7/7
Online ISSN:2188-5079
Summary:
In this paper, we propose a method for estimating an amount of delay of a sparse system using phase-only correlation(POC). The performance of the normalized-least-mean-square(NLMS) algorithm is largely affected by sparse systems, namely its rate of convergence decreases. Although proportionate NLMS(PNLMS) was proposed to improve the performance when the unknown system is a sparse system, only the NLMS algorithm could be used to update the filter. Therefore its performance depends on the correlation of the input signal. By taking advantages of property of POC, we exploit the amount of delay of the unknown sparse system without the effect of the correlation. Simulation results show that the proposed method could provide better estimation of the amount of delay compared to PNLMS when the input signal is correlated, such as speech signals.