Abstract
In this paper, we aim to develop a new subspace-based method for Direction Of Arrival estimation (direction-finding) using coherent wide band (WB) or ultra-wide band (UWB) signals. Subspace-based methods are well-established in the incoherent narrow band signals context; nevertheless, only a few of them are adapted to the case of WB or UWB coherent signals. Specifically, the proposed method is applied in the spectral domain using a zoomed digital Fourier transform achieved by chirped Z transform instead of the classical fast Fourier transform and does not need a decorrelation process. Then, it is implemented in a real-life application using single-input multiple-output UWB radar. The obtained results reveal the effectiveness of the proposed method compared with the existing methods in both simulated and real-life data.
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Data sharing not applicable to this article as no datasets were generated or analyzed during the current study.
Notes
Around the central frequency, P(f) can be considered as a complex constant.
\(f_z\) is the frequency where smoothing is applied with respect to the spectral flatness.
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Hamza, A., Ammar, M., Nabil, E.k.M. et al. Coherent Wideband Signals Direction Finding Using Subspace-Based Methods. Circuits Syst Signal Process 42, 1663–1684 (2023). https://doi.org/10.1007/s00034-022-02185-2
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DOI: https://doi.org/10.1007/s00034-022-02185-2