Efficient active noise controller using a fixed-point DSP

作     者：Chang, Cheng-Yuan 

作者机构：Chung Yuan Christian Univ Dept Elect Engn Jhongli 320 Taiwan 

出 版 物：《SIGNAL PROCESSING》 (信号处理)

年 卷 期：2009年第89卷第5期

页      面：843-850页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：National Science Council of the Republic of China [NSC-95-2221-E-231-009] 

主　　题：Active noise control Fixed-point DSP Magnitude and phase compensation Nonlinear distortion Quantization and rounding errors 

摘      要：This paper presents an efficient active noise control (ANC) system using a fixed-point DSP. The proposed controller uses magnitude and phase compensation to eliminate the errors associated with the nonlinear distortion of analog devices in the ANC system, and hence, to improve the noise reduction performance. The quantization and rounding errors associated with the fixed-point DSP are also compensated for. Several ANC experiments reveal that the proposed controller reduces broadband noise by about 20 dB and narrowband noise by about 45 dB. The compensation idea is also useful to other applications of filter design. (c) 2008 Elsevier B.V. All rights reserved.