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Title of Journal: J ElectronChina

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Abbravation: Journal of Electronics (China)

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SP Science Press

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10.1002/net.3230200109

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1993-0615

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Timevarying AR modeling and adaptive IIR notch fi

Authors: Jining Feng Xiaobo Yang Zhejun Diao Siliang Wu
Publish Date: 2011/03/11
Volume: 27, Issue: 4, Pages: 465-473
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Abstract

Using TimeVarying AR TVAR model and adaptive notch filter is a new method for the nonstationary 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 SignaltoInterference plusNoise 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

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