直扩系统中IIR格型滤波器抑制窄带干扰新方法与性能分析

龚文飞; 吴嗣亮; 李加琪

doi:10.3724/SP.J.1146.2009.00624

直扩系统中IIR格型滤波器抑制窄带干扰新方法与性能分析

doi: 10.3724/SP.J.1146.2009.00624

龚文飞^{①② 吴嗣亮,},
吴嗣亮,
李加琪

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- 被引次数: 0
出版历程
- 收稿日期: 2009-04-28
- 修回日期: 2010-06-25
- 刊出日期: 2010-10-19

A Novel Method of Narrow-band Interference Suppression Using IIR Lattice Filter in DSSS and Its Performance Analysis

Gong Wen-Fei^{①② 吴嗣亮
,},
Wu Si-Liang,
Li Jia-Qi

摘要

摘要: 该文提出一种直扩系统中基于IIR格型陷波器时域频域相结合的窄带干扰抑制新方法，该方法采用时域频域并行处理的结构，通过最优加窗和频谱校正技术在频域精确估计出干扰信号的频率，根据频率估计误差和干信比求出最优陷波带宽，由此自适应地调整时域IIR格型陷波器的参数。分析和实验表明，该方法较传统的自适应IIR窄带干扰抑制方法不仅具有更高的稳定性和实时性，而且在干扰得到有效抑制的情况下使有用信号的损失达到最小。
- 直接序列扩频通信 /
- 窄带干扰 /
- IIR格型陷波器 /
- 陷波带宽
Abstract: A novel Narrow-Band Interference (NBI) suppression method of IIR lattice notch filter based on the combination of NBI suppression in both time and frequency domain in DSSS is proposed. This method is implemented in a parallel processing structure. The frequency of NBI signal is accurately obtained by employing optimal window functions in the time domain and spectrum correcting method in frequency domain. The optimal rejection bandwidth of IIR notch filter in the frequency domain is obtained adaptively according to the error of frequency estimation and interference to signal ratio. Then the IIR notch filter coefficients are adjusted timely and adaptively. Analysis and results of the experiment show that the proposed method has better stabilization and real-time property than traditional adaptive NBI suppression methods of IIR, and minimizes the distortion of the signal in the full suppression of narrow-band interference.
- DSSS /
- Narrow-Band Interference (NBI) /
- IIR lattice notch filter /
- Rejection bandwidth

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Milstein L B. Interference rejection techniques in spread spectrum communications [J].Proceedings of the IEEE.1988, 76(6):657-671[2]徐向东，孟藏珍，袁俊泉. 基于递归最小二乘的DS-SS系统抗窄带干扰技术[J].电子与信息学报.2007, 29(11):2779-2782浏览Xu Xiang-dong, Meng Cang-zhen, and Yuan Jun-quan. The technique of narrowband interference rejection for DS-SS systems based on RLS algorithm [J].Journal of Electronic Information Technology.2007, 29(11):2779-2782[3]郭艺，王世练，张尔扬. 适应开环FIR滤波器抗窄带干扰方法研究[J].电子与信息学报.2007, 29(4):959-962浏览Guo Yi, Wang Shi-lian, and Zhang Er-yang. Study on open-loop adaptive FIR filter approach for interference suppression [J].Journal of Electronic Information Technology.2007, 29(4):959-962[4]张春海，朱江，王世练等. 可用于DSSS系统时变干扰抑制的IIR滤波器设计[J].信号处理.2007, 23(4):495-499Zhang Chun-hai, Zhu Jiang, and Wang Shi-lian, et al.. The design of IIR filters for time-varying interference suppression in DSSS communication systems [J]. Signal Processing, 2007, 23(4): 495-499.[5]Qin P and Cai P. A novel algorithm of adaptive IIR lattice notch filter and performance analysis [J].Journal of Shanghai University (English Edition.2007, 11(5):485-489[6]Cho N and Lee S. On the adaptive lattice notch filter for the detection of sinusoids [J].IEEE Transactions on Circuits and Systems.1993, 40(7):405-416[7]Regalia P A. An improved lattice-based adaptive IIR notch filter [J].IEEE Transactions on Signal Processing.1991, 39(9):2124-2128[8]张世平，赵永平，张绍卿等. 一种改进的自适应格型陷波算法及其收敛性分析[J].电子学报.2004, 32(2):338-341Zhang Shi-ping, Zhao Yong-ping, and Zhang Shao-qing, et al.. A modified adaptive algorithm of lattice notch filter and its convergence analysis [J]. Acta Electronica Sinica, 2004, 32(2): 338-341.[9]Won J and Cho N. Narrow-band interference suppression in direct sequence spread spectrum systems using a lattice IIR notch filter. In Proc. IEEE ICASSP'2001,Salt Lake City,2001, 4: 2236-2240.[10]Hirano K, Nishimura S, and Mitra S. Design of Digital Notch Filters [J].IEEE Transactions on Communications.1974, 22(7):964-970[11]Dusan A. Dynamics of frequency estimation in the frequency domain [J].IEEE Transactions on Instrumentation and Measurement.2007, 56(6):2111-2118[12]Irini S R, Branimir D R, and Veljko D P. Extremely flat-top windows for harmonic analysis[J]. IEEE Transactions on Signal Processing, 2007, 56(3): 1025-1041.[13]王晓君，陈禾，仲顺安. 改进的脉冲雷达信号加窗DFT频谱校正算法[J].北京理工大学学报.2008, 28(2):164-167Wang Xiao-jun, Chen He, and Zhong Shun-an. Improved correction algorithm of windowed DFT spectrum for pulsed radar signal [J]. Transactions of Beijing Institute of Technology, 2008, 28(2): 164-167.[14]王旭东，刘渝，邓振淼. 基于修正Rife算法的正弦波频率估计及FPGA实现[J].系统工程与电子技术.2008, 30(4):621-624Wang Xu-dong, Liu Yu, and Deng Zhen-miao. Modified Rife algorithm for frequency estimation of sinusoid and implementation in FPGA [J]. Systems Engineering and Electronics, 2008, 30(4): 621-624.[15]齐国清，贾欣乐. 插值FFT估计正弦信号频率的精度分析[J].电子学报.2004, 32(4):625-629Qi Guo-qing and Jia Xin-le. Accuracy analysis of frequency of sinusoid based on interpolated FFT [J]. Acta Electronica Sinica, 2004, 32(4): 625-629.[16]Amin G M. Interference Mitigation in Spread Spectrum Communication Systems Using Time-Frequency Distributions [J].IEEE Transactions on Signal Processing.1997, 45(1):90-101

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