基于均匀圆阵的多信号多参量估计中的参数配对问题
Problem in Parameter Automatic Pair of Multisignals Multiparameter Estimation Based on Uniform Circular-Shaped Antenna Array
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摘要: 该文介绍了一种基于均匀圆阵的超分辨无源测频测向算法中存在的问题，并且就这一问题提出了一种较好的解决方案。基于均匀圆阵模型的超分辨无源测频测向算法分为直接法和间接法两种，直接法的测频测向精度不高，间接法的测频测向精度虽然较高，但是，在来波包含多个单频信号的情况下，间接法容易发生各单频信号的频率、方位角、仰角3个估计出的参数不能正确自动配对的问题。本文具体解释了间接法中引起参数不能正确自动配对的原因，并且详细推导出了解决参数自动配对问题的一种可行方法。该方法比以前的间接法更加简单可靠。Abstract: A problem in an algorithm to estimate frequency and orientation of each arrival signal with uniform circular-shaped antenna array is introduced, and a resolvent of this problem is put forward in the paper. The algorithm quoted in this paper includes two methods: direct method and indirect method. As the precision of each arrival signals parameters estimated by direct method is not satisfied, an indirect method grounded on direct method is put forward to improve the precision mentioned above. But, when several single-frequency signals arriving at the same time, parameters of each signal estimated by indirect method cannot always be paired correctly, this paper explains the reason of that, and a method to solve this problem is introduced, the resolvent makes the indirect method more simple and credible than its preceding form.
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斯德谊,刘荣科,程岱松,沈士团,周荫清.时空欠采样宽频段信号频率和二维角估计方法.电子学报,2000,28(3):9-12.[2]张贤达.现代信号处理(第二版).北京:清华大学出版社,2002:90-93.[3]Zoltowski M D, Mathews C P. Real-time frequency and 2-D angle estimation with Sub-Nyquist spatio-temporal sampling. IEEE Trans. on Signal Processing, 1994, SP-42(10): 2781-2794. -
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