DIRECTION FINDING FOR CORRELATED WIDE-BAND SOURCES
未知噪声中相关宽带源的方向估计

In this paper, theoretical analyses and simulations are carried out to show that there are signal cancellation phenomena in the DED method proposed by Kumar (1996) for wide-band array processing in unknown noise, and new method is suggested to perform direction of arrival (DOA) estimation in unknown noise. In the new method, a wide-band focusing technique without initial estimate of the DOAs is employed, and the frequency-direction ambiguity in wide-band processing is avoided. Monte Carlo tests are carried out for comparing the performance of the new method with that of the DED method.