Papers

A variable step-size gradient adaptive lattice algorithm for multiple sinusoidal interference cancelation

International Journal
2011~2015
작성자
이진영
작성일
2013-05-01 21:59
조회
184
Authors : Seong-woo Kim, Young-Cheol Park, Dae Hee Youn

Year : 2013

Publisher / Conference : EURASIP Journal on Advances in Signal Processing

Volume : 106

In passive sonar, adaptive algorithms can be used to cancel strong sinusoidal self-interferences. In order to correctly recover low-power target signals during the early stages of processing, these adaptive algorithms must provide fast convergence and, at the same time, narrow notches at the frequencies of the sinusoids. In this respect, the gradient adaptive lattice (GAL) algorithm is a very attractive choice. However, the GAL algorithm with a constant step-size parameter has to compromise between the convergence rate and notch bandwidths. Therefore, in this article, we propose a variable step-size scheme for the GAL algorithm that can achieve both a fast convergence rate and narrow notches. Simulation results demonstrate the efficiency of the proposed algorithm compared to both the conventional GAL algorithm and transversal adaptive filter combined with the variable step-size scheme.
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