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https://hdl.handle.net/20.500.11851/11866
Title: | Spatial Correlation Modeling and Rs-Ls Estimation of Near-Field Channels With Uniform Planar Arrays | Authors: | Demir, Özlem Tuğfe Kosasih, Alva Bjornson, Emil |
Keywords: | Extremely Large-Scale Mimo Reduced-Subspace Least-Square Estimator Spatial Correlation Near-Field Channels |
Publisher: | Ieee | Series/Report no.: | IEEE International Workshop on Signal Processing Advances in Wireless Communications | Abstract: | Extremely large aperture arrays (ELAAs) can offer massive spatial multiplexing gains in the radiative near-field region in beyond 5G systems. While near-field channel modeling for uniform linear arrays has been extensively explored in the literature, uniform planar arrays-despite their advantageous form factor-have been somewhat neglected due to their more complex nature. Spatial correlation is crucial for non-line-of-sight channel modeling. Unlike far-field scenarios, the spatial correlation properties of near-field channels have not been thoroughly investigated. In this paper, we start from the fundamentals and develop a near-field spatial correlation model for arbitrary spatial scattering functions. Furthermore, we derive the lower-dimensional subspace where the channel vectors can exist. It is based on prior knowledge of the three-dimensional coverage region where scattering clusters exists and we derive a tractable one-dimensional integral expression. This subspace is subsequently employed in the reduced-subspace least squares (RS-LS) estimation method for near-field channels, thereby enhancing performance over the traditional least squares estimator without the need for having full spatial correlation matrix knowledge. | URI: | https://doi.org/10.1109/SPAWC60668.2024.10694490 | ISBN: | 9798350393194 9798350393187 |
ISSN: | 1948-3244 |
Appears in Collections: | Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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