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<p>Non-orthogonal multiple access (NOMA) is considered a promising multiple access technique for fifth generation (5G) wireless networks. It is also integrated with cooperative relaying to improve the coverage, achievable rate, reliability, and capacity of the 5G network. In this paper, we propose a cooperative NOMA system with decode and forward relay over <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\upkappa -\upmu \)</EquationSource> </InlineEquation> shadowed fading without using complex power allocation, and a second time slot is also used for the realization of the message sent from the transmitter. The transmitter sends the message to the destination with maximum power, which differs from conventional cooperative NOMA systems. We derive the outage probability and achievable rate of the proposed system by developing an analytical framework for the cumulative distribution function of the proposed system model. The performance of the system is analyzed in terms of outage probability (OP) and average achievable rate. Simulation results indicate that the proposed system outperforms the conventional NOMA system. The analytical results of this paper are validated using the Monte Carlo simulation.</p>

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Outage probability and achievable rate analysis of cooperative NOMA system over \({\varvec{\upkappa}}-{\varvec{\upmu}}\) shadowed fading channels

  • 期刊论文

  • 发表日期：

    2026年2月20日

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  • Saif Ahmad,
  • Mohd Javed Khan

摘要

Non-orthogonal multiple access (NOMA) is considered a promising multiple access technique for fifth generation (5G) wireless networks. It is also integrated with cooperative relaying to improve the coverage, achievable rate, reliability, and capacity of the 5G network. In this paper, we propose a cooperative NOMA system with decode and forward relay over \(\upkappa -\upmu \) shadowed fading without using complex power allocation, and a second time slot is also used for the realization of the message sent from the transmitter. The transmitter sends the message to the destination with maximum power, which differs from conventional cooperative NOMA systems. We derive the outage probability and achievable rate of the proposed system by developing an analytical framework for the cumulative distribution function of the proposed system model. The performance of the system is analyzed in terms of outage probability (OP) and average achievable rate. Simulation results indicate that the proposed system outperforms the conventional NOMA system. The analytical results of this paper are validated using the Monte Carlo simulation.