任意用户数和符号速率下MR-NOMA的性能分析
Performance Analysis of MR-NOMA with Arbitrary Number of Users and Symbol Rates
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中文总结 AI 辅助
本文分析MR-NOMA在Nakagami-m信道下任意用户数和符号速率的BER性能，推导精确及近似表达式，并证明其通过符号持续时间分集优于传统SR-NOMA，同时优化功率分配以支持灵活用户配对和QoS需求。
中文摘要 AI 辅助
本文在Nakagami-m衰落信道上，针对任意用户数和符号速率，对下行多速率非正交多址（MR-NOMA）的误码率（BER）性能进行了分析研究。分析首先针对三用户情形展开，随后推广至用户数超过三的系统，在完美串行干扰消除（SIC）假设下，为首个被检测用户推导出精确的BER表达式，并为其余用户推导出精确的闭式近似。这些结果进一步统一为Nakagami-m衰落信道上任意用户数和符号速率配置下的通用平均BER表达式。一种依赖于符号模式的信干噪比（SINR）分析进一步揭示了符号持续时间分集如何实现固有干扰消除，从而解释了MR-NOMA相较于传统单符号速率（SR）-NOMA的BER优势。此外，本文还构建了一个平均BER最小化问题，并通过数值求解优化用户的功率分配，仿真结果验证了分析结论。总体而言，MR-NOMA在保持可靠BER性能并满足多样化服务质量（QoS）需求的同时，在用户配对方面展现出更大的灵活性。
英文摘要
This paper analytically investigates the bit error rate (BER) performance of downlink multi-rate (MR)-non-orthogonal multiple access (NOMA) over Nakagami-m fading channels for an arbitrary number of users and symbol rates. The analysis is first developed for a three-user case, then generalized to systems with more than three users, yielding an exact BER expression for the first detected user and an accurate closed-form approximations for the remaining users under the perfect-successive interference cancellation (SIC) assumption. These results are further unified into a general average-BER expression over Nakagami-m fading for arbitrary user numbers and symbol-rate configurations. A symbol-pattern-dependent signal-to-interference plus noise ratio (SINR) analysis further shows how the symbol-duration diversity enables inherent interference cancellation, explaining the BER advantage of MR-NOMA over conventional single-symbol rate (SR)-NOMA. An average BER minimization problem is also formulated and numerically solved to optimize the users' power allocation, with simulation results corroborating the analytical findings. Overall, MR-NOMA is shown to offer greater flexibility in user pairing while maintaining reliable BER performance and accommodating diverse quality-of-service (QoS) requirements.
发表机构
- Khalifa University（哈利法大学）
- The University of Manchester（曼彻斯特大学）
机构由 AI 辅助整理，请以论文原文为准。
