TIME-VARYING AR MODELING AND ADAPTIVE IIR NOTCH FILTER FOR ANTI-JAMMING DSSS RECEIVER  

作　　者：Feng Jining Yang Xiaobo Diao Zhejun W.u. Siliang 

机构地区：[1]The Electronic Engineering Department, Hebei Normal University, Shijiazhuang 050031, China [2]ShiJiaZhuang Professional Technology Institute, Shijiazhuang 050081, China [3]School of Information Electronics, Beijing Institute of Technology, Beijing 100080, China

出　　处：《Journal of Electronics(China)》2010年第4期465-473,共9页电子科学学刊（英文版）

基　　金：Supported by the Natural Science Foundation of Hebei Province (F2010000442)

摘　　要：Using Time-Varying AR (TVAR) model and adaptive notch filter is a new method for the non-stationary jammer suppression in Direct Sequence Spread Spectrum (DSSS). The performance of TVAR model for Instantaneous Frequency (IF) estimation will be affected by some factors such as basis functions. Focusing on this problem, the optimal basis function of TVAR model for the IF estimation of the LFM signal is obtained in this paper. Besides the depth and width of notching, the phase properties of notch filter affect the Signal-to-Interference plus-Noise Ratio (SINR) of correlation output to the narrowband jammer suppression in DSSS, in response to the problem the closed solution of correlation output SINR improvement has been derived when a single frequency jammer passes through direct IIR notch filter, and its performance has been compared with those of five coefficient FIR filters. Later, a novel method for LFM jammer suppression based on Fourier basis TVAR model and direct IIR notch filter is proposed. The simulation results show the effectiveness of the proposed method.Using Time-Varying AR （TVAR） model and adaptive notch filter is a new method for the non-stationary jammer suppression in Direct Sequence Spread Spectrum （DSSS）. The performance of TVAR model for Instantaneous Frequency （IF） estimation will be affected by some factors such as basis functions. Focusing on this problem, the optimal basis function of TVAR model for the IF estimation of the LFM signal is obtained in this paper. Besides the depth and width of notching, the phase properties of notch filter affect the Signal-to-Interference plus-Noise Ratio （SINR） of correlation output to the narrowband jammer suppression in DSSS, in response to the problem the closed solution of correlation output SINR improvement has been derived when a single frequency jammer passes through direct IIR notch filter, and its performance has been compared with those of five coefficient FIR filters. Later, a novel method for LFM jammer suppression based on Fourier basis TVAR model and direct IIR notch filter is proposed. The simulation results show the effectiveness of the proposed method.

关 键 词：Direct Sequence Spread Spectrum （DSSS） receiver Time-Varying AR （TVAR） model IIR adaptive notch filter ANTI-JAMMING 

分 类 号：TN953.5[电子电信—信号与信息处理] TM83[电子电信—信息与通信工程]