A novel algorithm for intercept sonar signal detector

A novel algorithm for detecting intercept signals and acoustic transients is presented in this paper. The purpose of intercept sonar is to detect the active transmissions from ships, submarines and torpedoes. Since the intercept signal parameters are not known apriori, energy detection based method is proposed. In this approach, the signal energy estimate is compared with the background noise energy estimate. The comparison is done using Non-parametric Page Test with an adaptive threshold. The method also gives an estimate of pulse width of the signal received. The detection performance of the scheme is evaluated for various SNRs, by computer simulation for different types of intercept signals.