Multipath Parameters Estimation of Near-Field Spatial-Wideband Systems

This letter proposes a low-complexity, one-snapshot angle, range and channel gain estimation algorithm for a sparse multipath near-field spatial-wideband system. With upcoming mm-wave & sub-THz systems expected to operate massive antenna arrays, the transmitted wideband signal is not only sensit...

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Bibliographic Details
Published in:IEEE communications letters 2024-07, Vol.28 (7), p.1649-1653
Main Authors: Das, Shrayan, Sen, Debarati, Viterbo, Emanuele
Format: Article
Language:English
Subjects:
Algorithms
Angle of arrival
Antenna arrays
Broadband
Broadband antennas
Channel estimation
Chirp
Cramer-Rao bounds
DLCT
massive MIMO
Millimeter waves
Near fields
Near-field
OFDM
Parameter estimation
Parameter modification
Parameter sensitivity
Receiving antennas
spatial-wideband
Vectors
Wave fronts
Wave propagation
Wideband
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Summary:This letter proposes a low-complexity, one-snapshot angle, range and channel gain estimation algorithm for a sparse multipath near-field spatial-wideband system. With upcoming mm-wave & sub-THz systems expected to operate massive antenna arrays, the transmitted wideband signal is not only sensitive to the propagation delay across the array aperture but the resulting wavefront is no longer planar. A modified wideband discrete linear chirp transform (DLCT) is used to estimate the multipath parameters of such a system. Furthermore, an iterative neighbourhood search is proposed to acquire super-resolution estimates of the scatterer locations, path gain and the multipath's arrival angle. We also show that they are asymptotically optimal approaching their respective Cramér-Rao bounds.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2024.3396821