A Generalized STAR-RIS-Empowered Ambient Backscatter Short-Packet Communication Systems With Partial NOMA

This letter proposes a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS)-empowered ambient backscatter short-packet paradigm with partial non-orthogonal multiple access (p-NOMA). In this paradigm, a multi-antenna base station communicates with users using finit...

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Bibliographic Details
Published in:IEEE communications letters 2024-12, Vol.28 (12), p.2744-2748
Main Authors: Nguyen, Tien-Hoa, Vu, Thai-Hoc
Format: Article
Language:English
Subjects:
Backscatter
Backscattering
Communications systems
Energy efficiency
Error analysis
Fading channels
Hybrid active and passive simultaneously transmitting and reflecting reconfigurable intelligent surface
Information theory
Interference cancellation
NOMA
Nonorthogonal multiple access
Packet transmission
partial non-orthogonal multiple access
Probability density function
Reconfigurable intelligent surfaces
short-packet communication
Signal to noise ratio
Thermal noise
Upper bounds
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Summary:This letter proposes a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS)-empowered ambient backscatter short-packet paradigm with partial non-orthogonal multiple access (p-NOMA). In this paradigm, a multi-antenna base station communicates with users using finite blocklength schemes to achieve low latency transmission while flexibly exploiting the spectrum utilization via p-NOMA. Considering Nakagami-m fading channels, discrete phase-shift alignment, and imperfect successive interference cancellation, we provide a generalized information-theoretic framework that characterizes passive, active, and hybrid STAR-RIS types, to measure the block-error rate (BLER) and goodput. To gain useful insights into system designs, an upper-bound BLER at high transmit power has been derived. Numerical results demonstrate the BLER superiority of p-NOMA over its orthogonal multiple access (OMA) and NOMA counterparts, as well as the respective twofold and fourfold enhancements in terms of goodput.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2024.3475569