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Title: | Intelligent reflecting surface aided multiple access : capacity region and deployment strategy | Authors: | Zhang, S Zhang, R |
Issue Date: | 2020 | Source: | In the Proceedings of 2020 IEEE 21st International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 26-29 May 2020, Atlanta, GA, USA | Abstract: | Intelligent reflecting surface (IRS) is a new promising technology that is able to manipulate the wireless propagation channel via smart and controllable signal reflection. In this paper, we investigate the capacity region of a multiple access channel (MAC) with two users sending independent messages to an access point (AP), aided by M IRS reflecting elements. We consider two practical IRS deployment strategies that lead to different userAP effective channels, namely, the distributed deployment where the M reflecting elements form two IRSs, each deployed in the vicinity of one user, versus the centralized deployment where all the M reflecting elements are deployed in the vicinity of the AP. For the distributed deployment, we derive the capacity region in closed-form; while for the centralized deployment, we derive a capacity region outer bound and propose an efficient rateprofile based method to characterize an achievable rate region (or capacity region inner bound). Furthermore, we compare the capacity regions of the two cases and draw useful insights into the optimal deployment of IRS in practical systems. | Publisher: | Institute of Electrical and Electronics Engineers | ISBN: | 978-172815478-7 | DOI: | 10.1109/SPAWC48557.2020.9153884 | Description: | 2020 IEEE 21st International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 26-29 May 2020, Atlanta, GA, USA | Rights: | ©2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The following publication S. Zhang and R. Zhang, "Intelligent Reflecting Surface Aided Multiple Access: Capacity Region and Deployment Strategy," 2020 IEEE 21st International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Atlanta, GA, USA, 2020 is available at https://doi.org/10.1109/SPAWC48557.2020.9153884. |
Appears in Collections: | Conference Paper |
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