High-resolution DOA estimation of coherent sources based on acoustic vector-sensor array;

Four approaches to DOA estimation based on a single vector hydrophone;

Wideband DOA estimation based on an adaptive frequency-invariant-response array;

Bearing estimation of targets based on the highest eigenvalue of the correlation matrix;

The normal mode (least square producers) loses efficiency drastically when the length of digital signal processing does not match the length of echo, or the SNR is not a constant in target bearing estimation.

A method of target bearing estimation by means of center of gravity of area is given and the principle of the method is explained.

Two kinds of the direction of arrival estimation methods which are single linear spectrum method and multiply linear spectrum method are put forward.

The neighboring frequency correlation and harmonic frequency correlation coefficient of signal amplitudes were used together for the low-frequency section,the direction of arrival estimation for speech sources for the mid-frequency section,and the combinatio.

The RMS error for angle estimation by the non-spatial ESPRIT algorithm was about 3° and the main beam width of conventional beamforming was about 30°,which indicates that high resolution direction of arrival estimation could be obtained using the non-spatial ESPRIT algorithm without requiring information from an array manifold.

The Study on Beam-space DOA Estimator Based on Beam-forming System;

An Improved Method to Estimate the DOA of Distributed Sources;

High-resolution direction finding based on joint block-diagonalization of spatio-temporal correlation matrices;

Underwater Experiment Analysis of Bayesian High-Resolution Direction Finding Method;

On the basis of this model,a direction of arrival estimation algorithm is proposed based on minimum power estimation to solve the problem of estimating the direction of arrival in the microphone array speech enhancement system.