Dutta, Aparna and Anand, GV (2004) Detection of Transient Signals by Wavelet Packet Transform and Stochastic Resonance. In: 2004 IEEE Region 10 Conference TENCON 2004, 21-24 November, Chiang Mai,Thailand, Vol.1, 251 -254.
The problem of detecting an unknown transient signal in noise is considered. The observed data is first, quantized by a symmetric quantizer. By an optimum matching of the quantizer thresholds to the noise probability density function, the signal-to-noise ratio in the data is enhanced by the phenomenon of stochastic resonance. The output of the stochastic resonator (optimal quantizer) is then transformed using a translation-invariant wavelet packet transform (TIWPT). The magnitude of the maximum magnitude coefficient, in the entire TI-WPT decomposition is used as the test-statistic. Simulation results are presented to show that, at very low SNRs, the TIWPT detector preceded by the stochastic resonator gives a much better detection performance than a detector based on the TIWPT alone.
|Item Type:||Conference Paper|
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|Department/Centre:||Division of Electrical Sciences > Electrical Communication Engineering|
|Date Deposited:||08 Dec 2005|
|Last Modified:||19 Sep 2010 04:21|
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