Higher-order matched field processing

This paper introduces a cross-relation (CR) based higher order matched field (MF) processing technique for estimating the location of a random source in shallow water. It is known that the probability density function (PDF) signals emitted from marine vessels have higher order components. Using the higher order MF processor can cancel the effect of either white or non-white Gaussian random interferences since the third and higher odd moments and third and higher order cumulants of Gaussian random interferences are zero. We have examined the higher order content of experimental ship data as it effects the MF processor for estimation of location using different frequency bands. The ship data was recorded during a sea trial conducted in September 1993 in a region close to Vancouver Island, BC, Canada