Narrowband interference suppression in DSSS system based on frequency shift wavelet packet transform

Author

Zhang, Lanying ; Yuan, Sijie ; Chen, Yuan ; Yang, Jun

Author_Institution

TT&C Res. Center, Acad. of Equip. Command & Technol., Beijing, China

fYear

2009

fDate

16-19 Aug. 2009

Abstract

A narrowband interference suppression algorithm which combined wavelet packet transform with frequency shift is proposed. It first confined the interference in the center of a subband. Then, the signal is decomposed by wavelet packet transform, and interference is suppressed under subband power ratio rule. Finally, the signal is de-noised by soft-thresholding before signal reconstructed. Both analysis and simulation demonstrate that the interference is completely suppressed by frequency shift wavelet packet transform, the signal-to-noise ratio is improved by soft threshold signal de-noising, the single dwell time of acquisition is reduced and the acquisition performance is improved.

Keywords

interference suppression; signal denoising; signal reconstruction; spread spectrum communication; wavelet transforms; DSSS system; direct sequence spread spectrum system; frequency shift wavelet packet transform; narrowband interference suppression; signal decomposition; signal denoising; signal reconstruction; Analytical models; Frequency; Interference suppression; Narrowband; Performance analysis; Signal analysis; Spread spectrum communication; Wavelet analysis; Wavelet packets; Wavelet transforms; direct sequence spread spectrum; narrowband interference; signal de-noising; wavelet packet transform;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Measurement & Instruments, 2009. ICEMI '09. 9th International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-3863-1

Electronic_ISBN

978-1-4244-3864-8

Type

conf

DOI

10.1109/ICEMI.2009.5274559

Filename

5274559