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- Title
基于两次傅里叶变换的时域MUSIC 波达方向估计.
- Authors
邱岚
- Abstract
To solve the instability of Direction of Arrival(DOA) estimation of frequency-domain Multiple Signal Classification(MUSIC) in the case of few snapshots, a time-domain MUSIC method for DOA estimation based on twice Fourier Transform is proposed. Firstly, the frequency-domain form of received data of each element is obtained by the Fourier Transform whose phase is compensated in the search angle. Then, the time-domain complex analysis data is translated from the frequency-domain conjugate data after phase compensation by the Fourier Transform, and the covariance matrix is constructed in time-domain. Finally, the orthogonal noise subspace is solved by eigen-decomposition, the spatial spectrum of search angle is obtained, and the DOA is estimated. The processed results of numerical simulation and measured data show that, compared with the frequency-domain MUSIC method, under the case of one effective snapshot, the proposed method can statistically solve the orthogonal noise subspace and realize DOA estimation. The stability is improved 5 dB, and the background noise level and side-lobe level of spatial spectrum is improved more than 3 dB. So the proposed method has better performance of target detection and DOA estimation.
- Publication
Telecommunication Engineering, 2018, Vol 58, Issue 10, p1206
- ISSN
1001-893X
- Publication type
Article
- DOI
10.3969/j.issn.1001-893x.2018.10.016