Improvement of High Resolution DOA Estimation Method for Underwater Acoustic Near-field Source
ZHANG Guoguang
Abstract：The direction of arrival (DOA) estimation of the acoustic near-field source target is the key technology to realize the target detection and recognition algorithm, aiming at the problem of low precision of the MUSIC estimation, this paper proposes an algorithm for high resolution DOA estimation algorithm of underwater near-field source target based on high order cumulant joint parameter estimation.First, the array signal model of underwater near-field source target is constructed, the acquisition of the underwater acoustic near field target signals kurtosis feature is extracted, two kinds of high order cumulant of near-field source parameters are estimated, the acoustic near-field source target signal subspace is gotten, each signal source parameter is estimated finally to achieve near-field source high resolution DOA estimation.Simulation results show that the precision by using the algorithm of underwater acoustic near-field source target DOA estimation is higher, the target azimuth, DOA and distance parameters are combined for consistent estimation, unbiased parameter estimation is better.
Keywords：underwater acoustic near field sourcetargetparameter estimationDOAhigh order accumulation
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 30-33,46 )