TechRxiv

Low Complexity Signature Estimation of Near-Field Spatial-Wideband Systems

Download (495.61 kB)
Version 2 2023-12-07, 03:55
Version 1 2023-11-09, 03:37
preprint
posted on 2023-12-07, 03:55 authored by Shrayan DasShrayan Das, Debarati Sen, Emanuele ViterboEmanuele Viterbo

This letter proposes a low-complexity, two-step angle, range and delay signature estimation algorithm for a sparse multipath near-field spatial-wideband system. With upcoming sub-THz systems expected to have a large number of antennas, the transmitted wideband signal is not only sensitive to the physical propagation delay across the array aperture but the resulting wavefront is no longer locally planar. We use a combination of discrete linear chirp transform and discrete Fourier transform based techniques to estimate the spatial wideband signature of such a system. Further, we propose an iterative neighbourhood search to acquire super-resolution estimates of the scatterer locations, delays and angle of arrival of the multipaths and show that they are asymptotically optimal approaching their respective Cramér-Rao bounds. This letter proposes a low-complexity one-snapshot two-step signature estimation algorithm for a sparse multipath near-field spatial-wideband system. With upcoming sub-THz systems expected to have a large number of antennas, the transmitted wideband signal is not only sensitive to the physical propagation delay across the array aperture but the resulting wavefront is no longer locally planar. We use a combination of discrete Fourier and discrete linear chirp transform-based techniques to estimate the spatial wideband signature of such a system. Further, we propose an iterative neighbourhood search to acquire super-resolution estimates of the scatterer locations, delays and angle of arrival of the multipaths and show that they are asymptotically optimal approaching their respective Cramer- Rao bounds. 

Funding

Australian Research Council Discovery Project under Grant DP200100096

History

Email Address of Submitting Author

shrayandas@gmail.com

ORCID of Submitting Author

0000-0001-6228-1483

Submitting Author's Institution

Monash University

Submitting Author's Country

  • Australia

Usage metrics

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC