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The active simultaneously transmitting and reflecting surface (ASTARS) has attracted significant academic interest for its ability to alleviate multiplicative fading and reshape the full-space electromagnetic environment. In this paper, we propose to use ASTARS to support non-orthogonal multiple access (NOMA) in uplink communications. By considering both perfect and imperfect successive interference cancellation (pSIC/ipSIC), we establish novel closed-form and asymptotic expressions for the outage probability in ASTARS-NOMA uplink network. Additionally, the system throughput of ASTARS-NOMA uplink networks is evaluated under delay-limited transmission mode.Numerical results indicate that: (i) The outage probability of ASTARS-NOMA uplink networks is superior to that of ASTARS-assisted orthogonal multiple access (OMA) uplink networks, and (ii) The system throughput of ASTARS-NOMA uplink networks exceeds that of other benchmark schemes.

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Outage Probability of ASTARS-NOMA Uplink Networks

  • 会议论文

  • 发表日期：

    2025年

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  • Xinning Guo,
  • Xinwei Yue,
  • Hongxu Jin,
  • Xianli Gong,
  • Peng Yang

摘要

The active simultaneously transmitting and reflecting surface (ASTARS) has attracted significant academic interest for its ability to alleviate multiplicative fading and reshape the full-space electromagnetic environment. In this paper, we propose to use ASTARS to support non-orthogonal multiple access (NOMA) in uplink communications. By considering both perfect and imperfect successive interference cancellation (pSIC/ipSIC), we establish novel closed-form and asymptotic expressions for the outage probability in ASTARS-NOMA uplink network. Additionally, the system throughput of ASTARS-NOMA uplink networks is evaluated under delay-limited transmission mode.Numerical results indicate that: (i) The outage probability of ASTARS-NOMA uplink networks is superior to that of ASTARS-assisted orthogonal multiple access (OMA) uplink networks, and (ii) The system throughput of ASTARS-NOMA uplink networks exceeds that of other benchmark schemes.