Title :
Detection of transient signals in shallow ocean using suprathreshold stochastic resonance and wavelet packet transform
Author :
Datta, Vishaka ; Prasad, Vivek H. ; Anand, G.V.
Author_Institution :
Dept. of Math., Indian Inst. of Technol., Kharagpur, India
Abstract :
In this paper, we propose the use of the phenomenon of suprathreshold stochastic resonance (SSR) in the detection of a transient signal in a noisy environment. An SSR pre-processor consisting of an array of 2-level quantizers is used to boost the SNR of the data before being transformed by a translation invariant wavelet packet transform (TIWPT). The maximum magnitude coefficient of the TIWPT output is used as a test statistic. Simulation results show that this detector performs better than a detector using a stochastic resonance (SR) pre-processor with a TIWPT detector.
Keywords :
geophysical signal processing; oceanographic techniques; signal detection; stochastic processes; wavelet transforms; SNR; TIWPT detector; shallow ocean; suprathreshold stochastic resonance; transient signal detection; translation invariant wavelet packet transform; Detectors; Oceans; Signal to noise ratio; Strontium; Transforms; Transient analysis; suprathreshold stochastic resonance; transient detection; wavelet packet transform;
Conference_Titel :
Ocean Electronics (SYMPOL), 2009 International Symposium on
Conference_Location :
Cochin
Print_ISBN :
978-1-4244-9119-3
Electronic_ISBN :
978-1-4244-9118-6
DOI :
10.1109/SYMPOL.2009.5664148
