Abstract
This paper investigates a backscatter communication non-orthogonal multiple access (BackCom NOMA) system with a multi-antenna single access point (AP), where both downlink users and BackCom devices (BDs) have one antenna, and users possess perfect channel state information (CSI) while the AP has imperfect channel information. We optimize the sum uplink rate by adjusting beamforming vectors and reflection indices. Utilizing the S-procedure to address channel uncertainties and applying semidefinite relaxation (SDR) for problem convexification, we achieve a sub-optimal solution via an alternating optimization approach. Simulation results demonstrate the superiority of our proposed scheme compared to traditional user-focused power allocation strategies in sum uplink rate.
| Original language | English |
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| Title of host publication | 2024 19th International Symposium on Wireless Communication Systems, ISWCS 2024 |
| Publisher | VDE Verlag GmbH |
| ISBN (Electronic) | 9798350362510 |
| DOIs | |
| State | Published - 2024 |
| Externally published | Yes |
| Event | 19th International Symposium on Wireless Communication Systems, ISWCS 2024 - Rio de Janeiro, Brazil Duration: 14 Jul 2024 → 17 Jul 2024 |
Publication series
| Name | Proceedings of the International Symposium on Wireless Communication Systems |
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| ISSN (Print) | 2154-0217 |
| ISSN (Electronic) | 2154-0225 |
Conference
| Conference | 19th International Symposium on Wireless Communication Systems, ISWCS 2024 |
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| Country/Territory | Brazil |
| City | Rio de Janeiro |
| Period | 14/07/24 → 17/07/24 |
Bibliographical note
Publisher Copyright:© 2024 IEEE.
Keywords
- Backscatter communication (BackCom)
- S-procedure
- imperfect channel state information (CSI)
- non-orthogonal multiple access (NOMA)
- semidefinite relaxation (SDR)
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering
- Communication