未知噪声中相关宽带源的方向估计
DIRECTION FINDING FOR CORRELATED WIDE-BAND SOURCES
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摘要: 本文通过分析和模拟显示了DED方法存在失效。对此提出了计算未知噪声中波达方向的新方法,它利用宽带聚焦,避免了宽带处理的频率一方向模糊。用Monte Carlo方法对DED和新方法进行了对比测试。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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