The DOI matches its Crossref record; 39 of the 39 references it cites were found in a registry or an index.
Beam Focusing for Near-Field Multiuser MIMO Communications
Open accessAbstract
Large antenna arrays and high-frequency bands are two key features of future wireless communication systems. The combination of large-scale antennas with high transmission frequencies often results in the communicating devices operating in the near-field (Fresnel) region. In this paper, we study the potential of beam focusing, feasible in near-field operation, in facilitating high-rate multi-user downlink multiple-input multiple-output (MIMO) systems. As the ability to achieve beam focusing is dictated by the transmit antenna, we study near-field signalling considering different antenna structures, including fully-digital architectures, hybrid phase shifter-based precoders, and the emerging dynamic metasurface antenna (DMA) architecture for massive MIMO arrays. We first provide a mathematical model to characterize near-field wireless channels as well as the transmission pattern for the considered antenna architectures. Then, we formulate the beam focusing problem for the goal of maximizing the achievable sum-rate in multi-user networks. We propose efficient solutions based on the sum-rate maximization task for fully-digital, (phase shifters based-) hybrid and DMA architectures. Simulation results show the feasibility of the proposed beam focusing scheme for both single- and multi-user scenarios. In particular, the designed focused beams provide a new degree of freedom to mitigate interference in both angle and distance domains, which is not achievable using conventional far-field beam steering, allowing reliable communications for uses even residing at the same angular direction.
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Cites
Noncooperative Cellular Wireless with Unlimited Numbers of Base Station Antennas
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Tang, W., Chen, M. Z., Chen, X., Dai, J. Y., Han, Y., Di Renzo, M., Zeng, Y., Jin, S., Cheng, Q., & Cui, T. J. (2021) · IEEE Transactions on Wireless Communications · doi:10.1109/twc.2020.3024887 · Cited by 1,606
Alternating Minimization Algorithms for Hybrid Precoding in Millimeter Wave MIMO Systems
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Hybrid Digital and Analog Beamforming Design for Large-Scale Antenna Arrays
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Multicell MIMO Communications Relying on Intelligent Reflecting Surfaces
Pan, C., Ren, H., Wang, K., Xu, W., Elkashlan, M., Nallanathan, A., & Hanzo, L. (2020) · IEEE Transactions on Wireless Communications · doi:10.1109/twc.2020.2990766 · Cited by 1,073
Weighted Sum-Rate Maximization for Reconfigurable Intelligent Surface Aided Wireless Networks
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Cited by
Gong, T., Gavriilidis, P., Ji, R., Huang, C., Alexandropoulos, G. C., Wei, L., Zhang, Z., Debbah, M., Poor, H. V., & Yuen, C. (2024) · IEEE Communications Surveys & Tutorials · doi:10.1109/comst.2023.3309529 · Cited by 328
Near-Field Communications: Research Advances, Potential, and Challenges
An, J., Yuen, C., Dai, L., Di Renzo, M., Debbah, M., & Hanzo, L. (2024) · IEEE Wireless Communications · doi:10.1109/mwc.004.2300450 · Cited by 122
Near-Field Beamforming for Stacked Intelligent Metasurfaces-Assisted MIMO Networks
Papazafeiropoulos, A., Kourtessis, P., Chatzinotas, S., Kaklamani, D. I., & Venieris, I. S. (2024) · IEEE Wireless Communications Letters · doi:10.1109/lwc.2024.3438840 · Cited by 18
Metadata
- Authors
- Zhang, H., Shlezinger, N., Guidi, F., Dardari, D., Imani, M. F., & Eldar, Y. C.
- Venue
- IEEE Transactions on Wireless Communications
- Published
- 2022-09
- Volume
- 21
- Issue
- 9
- Pages
- 7476-7490
- ISSN
- 1536-1276 (ISSN-L)
- 1558-2248
- OpenAlex
- W3164550829
- Cited by
- 507
- References
- 39
- FWCI
- 27.64
- Type
- journal article
- Language
- en
- Open access
- green
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- Zhang, H., Shlezinger, N., Guidi, F., Dardari, D., Imani, M. F., & Eldar, Y. C. (2022). Beam Focusing for Near-Field Multiuser MIMO Communications. IEEE Transactions on Wireless Communications. https://doi.org/10.1109/twc.2022.3158894
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