An anti-jamming algorithm using wavelet packet modulated spread spectrum
Military Communications Conference Proceedings, 1999. MILCOM 1999. IEEE（1999）
摘要
In this paper, a novel wavelet packet modulated direct sequence spread spectrum system is introduced, and an anti-jamming algorithm is also developed to suppress narrow band jamming signals. According to the time series theory, Fisher's test can detect the hidden sinusoids in an AWGN environment, which give us a clue to detect the jamming signal. We generalize this algorithm so that we can detect the hidden wavelet packet components in an AWGN environment. The normalized energy distribution of the wavelet packet transformed signal is derived, a threshold is determined and the jamming signal is excised. Jamming signals with different strength and different bandwidth are investigated. Based on the simulation results, the generalized Fisher's test can effectively suppress interference in wide ranges
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关键词
simulation results,ds-ss,direct sequence spread spectrum system,jamming signal detection,awgn,modulation,hidden wavelet packet components,bandwidth,discrete wavelet transform,anti-jamming algorithm,hidden sinusoids detection,wavelet packet transformed signal,spread spectrum communication,time series theory,narrow band jamming signal suppression,generalized fisher's test,wavelet packet modulated spread spectrum,interference suppression,awgn environment,normalized energy distribution,jamming,signal detection,discrete wavelet transforms,wavelet packets,testing,frequency,time series,direct sequence spread spectrum,spread spectrum,wavelet packet transform
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