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Erschienen in:
2015 | OriginalPaper | Buchkapitel
51. A Novel DOA Estimation Algorithm for Wideband LFM Source with Local Scattering
verfasst von : Liang Zhang, Jiexiao Yu, Kaihua Liu, Deliang Liu
Erschienen in: The Proceedings of the Third International Conference on Communications, Signal Processing, and Systems
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Abstract
To realize the direction of arrival (DOA) estimation of wideband Linear Frequency-modulated (LFM) source with local scattering, an approximate model is derived by Taylor series expansion and a novel estimation algorithm using fractional Fourier transform (FrFT) is proposed. New array data models in both the time domain and the fractional Fourier domain are presented and the one-to-one relationship between the location vector in the Energy-concentrated domain and the spatial parameters is given. Then, the conventional Multiple Signal Classification (MUSIC) algorithm is exploited to estimate the spatial parameters of multiple wideband LFM sources with local scattering in the Energy-concentrated domain. Compared with the previous FrFT-MUSIC algorithm based on the assumption of point source model, the proposed algorithm has better performance on location position accuracy and anti-noise property.