Adaptive optimization of notch bandwidth of an IIR filter used to suppress narrow-band interference in DSSS system

作     者：Mvuma, A Nishimura, S Hinamoto, T 

作者机构：Hiroshima Univ Grad Sch Engn Higashihiroshima 7398527 Japan Shimane Univ Dept Elect & Control Syst Engn Matsue Shimane 6908504 Japan 

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：2002年第E85A卷第8期

页      面：1789-1797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）] 

主　　题：adaptive IIR notch filter DSSS communication narrow-band interference LMS algorithm bit error rate 

摘      要：Adaptive optimization of the notch bandwidth of a lattice-based adaptive infinite impulse response (IIR) notch filter is presented in this paper. The filter is used to improve the performance of a direct sequence spread spectrum (DSSS) binary phase shift keying (BPSK) communication system by suppressing a narrow-band interference at the receiver. A least mean square (LMS) algorithm used to adapt the notch bandwidth coefficient to its optimum value which corresponds to the maximum signal to noise ratio (SNR) improvement factor is derived. Bit error rate (BER) improvement gained by the DSSS communication system using the filter with the optimized notch bandwidth is also shown. Computer simulation results are compared with those obtained analytically to demonstrate the validity of theoretical predictions for various received signal parameters.