任意幾何結(jié)構(gòu)陣列下的空間信號頻率估計
ESTIMATING FREQUENCIES OF SPATIAL SIGNALS FOR ARBITRARY GEOMETRY ARRAY
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摘要: 該文論述了一種基于波束空間ESPRIT并適用于任意幾何結(jié)構(gòu)陣列的空間信號頻率估計算法。在把陣元空間數(shù)據(jù)映射到DFT空間后,提取出不依賴于陣列幾何結(jié)構(gòu)的頻率矢量,然后運用BeamspaceESPRIT的概念并通過一個間接的方法估計出信號頻率。計算機模擬結(jié)果證實了該算法對不同陣列獲取的信號的測頻有效性并顯示出良好的高分辨、高精度性能。
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關(guān)鍵詞:
- 任意陣; 頻率估計; 矩陣束; 頻率矢量; DET空間
Abstract: This paper presents a ESPRIT-based algorithm to estimate carrier frequencies of independent spatial signals with no geometric constraints on the array. After mapping the element space data into DFT space, the frequency vector is extracted which is independent of array information, and then beamspace ESPRIT is used to estimate the spatial signals frequencies via an indirect ESPRIT method. The simulation results demonstrate our algorithm to be of high-resolution and high-precision with arbitrary array geometry. -
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