Range-Selective Beamforming With Reduced Computation to Illuminate/Suppress Multiple Dot-Like Loci in the Far Field

The recently proposed "equivalent transmit beamforming" (ETB) scheme for the frequency diverse array effectively forms a beampattern that spotlights a particular spatial location in the far field. This contrasts with conventional beamforming that illuminates the whole range along the desir...

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Bibliographic Details
Published in:IEEE transactions on aerospace and electronic systems 2023-06, Vol.59 (3), p.3388-3394
Main Authors: Youssef, Yazan, Mir, Hasan S., Albasha, Lutfi, Wong, Kainam Thomas
Format: Article
Language:English
Subjects:
Array signal processing
Beamforming
Computational geometry
Computer architecture
Convexity
frequency diverse array (FDA)
Frequency diversity
Numerical simulation
Optimization
radar signal processing
Receiving antennas
Spatial resolution
Transmitting antennas
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Summary:The recently proposed "equivalent transmit beamforming" (ETB) scheme for the frequency diverse array effectively forms a beampattern that spotlights a particular spatial location in the far field. This contrasts with conventional beamforming that illuminates the whole range along the desired direction. However, the pioneering ETB method is computationally challenging to execute in time-sensitive scenarios. As such, this article proposes a lower complexity scheme for ETB based on a convex optimization reformulation with a reduced number of degrees of freedom. Moreover, whereas the ETB method lights up one spot at a time, the proposed method can illuminate/suppress several designated spots simultaneously while producing a beampattern that exhibits a finer spatial resolution. Numerical simulations are conducted to verify the efficacy of the proposed approach.
ISSN:0018-9251
1557-9603
DOI:10.1109/TAES.2022.3212027