未知噪聲中相關寬帶源的方向估計
DIRECTION FINDING FOR CORRELATED WIDE-BAND SOURCES
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摘要: 本文通過分析和模擬顯示了DED方法存在失效。對此提出了計算未知噪聲中波達方向的新方法,它利用寬帶聚焦,避免了寬帶處理的頻率一方向模糊。用Monte Carlo方法對DED和新方法進行了對比測試。Abstract: 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.
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