Title :
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
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;
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
DOI :
10.1109/ICEMI.2009.5274559
