基于均勻圓陣的多信號多參量估計中的參數(shù)配對問題
Problem in Parameter Automatic Pair of Multisignals Multiparameter Estimation Based on Uniform Circular-Shaped Antenna Array
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摘要: 該文介紹了一種基于均勻圓陣的超分辨無源測頻測向算法中存在的問題，并且就這一問題提出了一種較好的解決方案。基于均勻圓陣模型的超分辨無源測頻測向算法分為直接法和間接法兩種，直接法的測頻測向精度不高，間接法的測頻測向精度雖然較高，但是，在來波包含多個單頻信號的情況下，間接法容易發(fā)生各單頻信號的頻率、方位角、仰角3個估計出的參數(shù)不能正確自動配對的問題。本文具體解釋了間接法中引起參數(shù)不能正確自動配對的原因，并且詳細推導出了解決參數(shù)自動配對問題的一種可行方法。該方法比以前的間接法更加簡單可靠。
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關(guān)鍵詞:
- 測頻測向; 均勻圓陣; 多信號多參量估計; 參數(shù)自動配對
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. -
斯德誼,劉榮科,程岱松,沈士團,周蔭清.時空欠采樣寬頻段信號頻率和二維角估計方法.電子學報,2000,28(3):9-12.[2]張賢達.現(xiàn)代信號處理(第二版).北京:清華大學出版社,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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