Optimal Detection in Flank Array

摘要

In underwater acoustic signal processing, flank enlarges the apertures of array and establishes a better foundation in weak signal detection; it includes two steps that are the processing in space domain and detection in time domain. Optimal detection is the basis of system design and can approximate the up limit performance of real ones. This paper presented an optimal detection method and derived its test statistics; in space domain, the maximum output SNR criterion is used and implemented by spatial whitening and match processing, in which the spatial difference between target signal and noise are utilized fully; in time domain, based on the N-P criteria, after the noise whitening and Wiener filter the output energy is then calculated, where the differences in spectral shape and spectral level between signal and noise are fully taken into account.