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DOA Estimation of Moving Target under the Clutter Environment by Applying MUSIC to the QMF Doppler Filter Bank
Toshihiko FUKUE Nozomu HAMADA
Publication
IEICE TRANSACTIONS on Communications
Vol.E88-B
No.5
pp.2142-2151 Publication Date: 2005/05/01 Online ISSN:
DOI: 10.1093/ietcom/e88-b.5.2142 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Sensing Keyword: radar, DOA, MUSIC, wavelet transform, quadrature mirror filter bank,
Full Text: PDF(1.1MB)>>
Summary:
This paper proposes a new angular measurement system to a moving target in the presence of clutter. We apply MUSIC (MUltiple SIgnal Classification) to the outputs of a Doppler filter bank consisting of quadrature mirror filter (QMF). The comparison between QMF and the short time Fourier transform (STFT) as a preprocessor of MUSIC is also discussed. DOA estimation performance by QMF-MUSIC is nearly equal to that of STFT-MUSIC. On the other hand, QMF-MUSIC overcomes STFT-MUSIC in the aspect of computational cost. In a specific example in this paper, the proposal QMF bank by Daubechies (4th order) wavelet requires 80% fewer the number of multiplications and 25% fewer the number of additions than the FFT-based STFT filter bank.
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