Kurtosis Estimation in the Frequency Domain Used in Multipath Detection (Kurtosisi Frekvensdomaenen foer Detektion av Flervaegsutbredning)

摘要

The study aims to show the potential of using the frequency domain kurtosisestimate, in conjunction with the conventional power spectrum estimate, as a tool in detecting severe multipath interference. Only narrowband continuous wave cw-signals in shallow water are taken in to consideration. Both simulated and real data recordings from a controlled field experiment are evaluated. The basic concepts in array signal processing in an underwater environment are presented. Theories of modeling an underwater environment as a sound wave propagation media are discussed. A multiplicative model with additive noise is used.