A Bias-Free Adaptive Beamformer with GSC-APA

作     者：Han, Yun-Ki Lee, Jae-Woo Lee, Han-Sol Song, Woo-Jin 

作者机构：POSTECH Div Elect & Comp Engn Pohang South Korea 

出 版 物：《IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES》 (电子信息通信学会汇刊：电子学、通信及计算机科学基础)

年 卷 期：2015年第E98A卷第6期

页      面：1295-1299页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：National Research Foundation of Korea (NRF) - Korea government (MEST) [2012R1A2A2A01011112] MSIP (Ministry of Science, ICT and Future Planning), Korea under C-ITRC (Convergence Information Technology Research Center) [IITP-2015-H8601-15-1005] 

主　　题：adaptive beamformer generalized sidelobe canceller affine projection algorithm bias-compensation 

摘      要：We propose a novel bias-free adaptive beamformer employing an affine projection algorithm with the optimal regularization parameter. The generalized sidelobe canceller affine projection algorithm suffers from a bias of a weight vectors under the condition of no reference signals for output of an array in the beamforming application. First, we analyze the bias in the algorithm and prove that the bias can be eliminated through a large regularization parameter. However, this causes slow convergence at the initial state, so the regularization parameter should be controlled. Through the optimization of the regularization parameter, the proposed method achieves fast convergence without the bias at the steady-state. Experimental results show that the proposed beamformer not only removes the bias but also achieves both fast convergence and high steady-state output signal-to-interference-plus-noise ratio.