Ergodic capacity analysis of STAR-RIS-NOMA over Nakagami-m fading channel with imperfect-CSI, inter-cell interference and SIC
Future wireless technologies must adhere to elevated requirements by providing increased data throughput, reduced latency, and enhanced flexibility. Integration of Non-Orthogonal Multiple Access (NOMA) with Reconfigurable Intelligent Surfaces (RIS) has attracted major interest to satisfy these needs...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025021784 |
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| Summary: | Future wireless technologies must adhere to elevated requirements by providing increased data throughput, reduced latency, and enhanced flexibility. Integration of Non-Orthogonal Multiple Access (NOMA) with Reconfigurable Intelligent Surfaces (RIS) has attracted major interest to satisfy these needs. Specifically, Simultaneously Transmitting and Reflecting RIS (STAR-RIS) offers an advanced way to manage signals by controlling them in both sending and bouncing directions, which improves how well the system uses its frequency and extends its range. To put STAR-RIS-NOMA into practice, we need to closely examine how successive interference cancellation (SIC), interference from nearby cells, and errors in channel state information (CSI) affect it. In this paper, we derive mathematical formulas for STAR-RIS-NOMA's ergodic capacity across Nakagami-m fading channels. These formulas take into account the effects of SIC errors, inter-cell interference, and CSI errors. We look at the STAR-RIS-NOMA system with two users and evaluate our analytical results using important system factors like the number of interferers, CSI error, the fading parameter (m), SIC error, and the number of STAR-RIS elements. These findings are validated by simulated outcomes. |
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| ISSN: | 2590-1230 |