Novel Algorithm for Frequency Estimation of CW Interference in DSSS Systems

Author

Wang Aihua ; Xia Caijie ; An Jianping ; Guo Yongzheng

Author_Institution

Dept. of Electron. Eng., Beijing Inst. of Technol., Beijing

fYear

2007

fDate

21-25 Sept. 2007

Firstpage

1224

Lastpage

1227

Abstract

This paper proposes a new technique for frequency estimation of continuous wave (CW) interference, and hence, IIR notch filter is constructed to excise interference in direct sequence spread spectrum (DSSS) systems. The new estimator (Fourier interpolation estimator: FIE) only involves three Fourier components. Both analysis results and numerical simulation results show that the FIE outperforms the adaptive line enhancer (ALE) by comparison, especially in computational simplicity. The IIR notch filter constructed by FIE has better Signal-to-Noise ratio (SNR) improvement than both linear and nonlinear prediction filters.

Keywords

Fourier analysis; IIR filters; frequency estimation; interpolation; notch filters; radiofrequency interference; spread spectrum communication; CW interference; DSSS systems; Fourier interpolation estimator; IIR notch filter; continuous wave interference; direct sequence spread spectrum systems; frequency estimation; Adaptive filters; Frequency estimation; IIR filters; Interference; Interpolation; Line enhancers; Nonlinear filters; Numerical simulation; Signal processing algorithms; Spread spectrum communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-1311-9

Type

conf

DOI

10.1109/WICOM.2007.312

Filename

4340087