Beamforming Design for Intelligent Reflecting Surface-Enhanced Symbiotic Radio Systems
Hu S, Liu C, Wei Z, Cai Y, Kwan Ng DW, Yuan J (2022)
Publication Type: Conference contribution
Publication year: 2022
Journal
Publisher: Institute of Electrical and Electronics Engineers Inc.
Book Volume: 2022-May
Pages Range: 2651-2657
Conference Proceedings Title: IEEE International Conference on Communications
Event location: Seoul, KOR
ISBN: 9781538683477
DOI: 10.1109/ICC45855.2022.9838902
Abstract
This paper investigates multiuser multi-input single-output downlink symbiotic radio communication systems assisted by an intelligent reflecting surface (IRS). Different from existing methods ideally assuming the secondary user (SU) can jointly decode information symbols from both the access point (AP) and the IRS via multiuser detection, we consider a more practical SU that only non-coherent detection is available. To characterize the non-coherent decoding performance, a practical upper bound of the average symbol error rate (SER) is derived. Subsequently, we jointly optimize the beamformer at the AP and the phase shifts at the IRS to maximize the average sum-rate of the primary system taking into account the maximum tolerable SER constraint for the SU. To circumvent the couplings of variables, we exploit the Schur complement that facilitates the design of a suboptimal beamforming algorithm based on successive convex approximation. Our simulation results show that compared with various benchmark algorithms, the proposed scheme significantly improves the average sum-rate of the primary system, while guaranteeing the decoding performance of the secondary system.
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APA:
Hu, S., Liu, C., Wei, Z., Cai, Y., Kwan Ng, D.W., & Yuan, J. (2022). Beamforming Design for Intelligent Reflecting Surface-Enhanced Symbiotic Radio Systems. In IEEE International Conference on Communications (pp. 2651-2657). Seoul, KOR: Institute of Electrical and Electronics Engineers Inc..
MLA:
Hu, Shaokang, et al. "Beamforming Design for Intelligent Reflecting Surface-Enhanced Symbiotic Radio Systems." Proceedings of the 2022 IEEE International Conference on Communications, ICC 2022, Seoul, KOR Institute of Electrical and Electronics Engineers Inc., 2022. 2651-2657.
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