多天线下行NOMA短包通信性能分析

IF 2.2 4区计算机科学 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Physical Communication Pub Date : 2025-10-04 DOI:10.1016/j.phycom.2025.102867

Xinjie Wang, Yongchang Li, Xunxun Li, Enyu Li, Xuhu Wang

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引用次数: 0

摘要

本文对多天线下行NOMA短包系统在基站中的性能进行了分析。该多天线系统吸收了最大最小天线选择方案，并考虑了过时信道侧信息（CSI）。导出了平均块错误率（BLER）的解析表达式。同时，还研究了高信噪比下平均BLER的渐近行为。结果表明，过时系数、天线数和分组长度对平均传输效率有较大影响。根据渐近表达式，我们发现当完美CSI出现时，平均BLER的分集阶数与由包长度和速率阈值决定的固定范围内的天线数之间仅存在线性相关，否则分集阶数仅为0、1或2。仿真结果证实了理论分析的正确性，同时也表明在低BLER要求下，短包系统比长包系统的功率分配范围更小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Performance analysis of downlink NOMA short-packet communications with multiple antennas

This paper analyzes the performance of downlink NOMA short-packet system with multiple antennas at base station. The max–min antenna selection scheme is absorbed into this multi-antenna system, and the outdated channel side information (CSI) is also considered. The analytical expressions for the average block error rate (BLER) are derived. Meanwhile, the asymptotic behaviors of average BLER at high signal-to-noise ratio (SNR) are also studied. The results should that the outdated coefficient, antennas’ number and packet length have a large effect on the average BLER. Based on the asymptotic expressions, we find that there is only a linear correlation between the diversity order of the average BLER and the antennas number in a fixed range decided by packet length and rate threshold when the perfect CSI appears, otherwise the diversity order is only zero, one or two. The simulation results are provided to confirm the theoretical analysis, and they also show that the short-packet system reduces the scope of power allocation compared to the long-packet system when a low BLER is required.

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来源期刊

Physical Communication ENGINEERING, ELECTRICAL & ELECTRONICTELECO-TELECOMMUNICATIONS

CiteScore

5.00

自引率

9.10%

发文量

212

审稿时长

55 days

期刊介绍： PHYCOM: Physical Communication is an international and archival journal providing complete coverage of all topics of interest to those involved in all aspects of physical layer communications. Theoretical research contributions presenting new techniques, concepts or analyses, applied contributions reporting on experiences and experiments, and tutorials are published. Topics of interest include but are not limited to: Physical layer issues of Wireless Local Area Networks, WiMAX, Wireless Mesh Networks, Sensor and Ad Hoc Networks, PCS Systems; Radio access protocols and algorithms for the physical layer; Spread Spectrum Communications; Channel Modeling; Detection and Estimation; Modulation and Coding; Multiplexing and Carrier Techniques; Broadband Wireless Communications; Wireless Personal Communications; Multi-user Detection; Signal Separation and Interference rejection: Multimedia Communications over Wireless; DSP Applications to Wireless Systems; Experimental and Prototype Results; Multiple Access Techniques; Space-time Processing; Synchronization Techniques; Error Control Techniques; Cryptography; Software Radios; Tracking; Resource Allocation and Inference Management; Multi-rate and Multi-carrier Communications; Cross layer Design and Optimization; Propagation and Channel Characterization; OFDM Systems; MIMO Systems; Ultra-Wideband Communications; Cognitive Radio System Architectures; Platforms and Hardware Implementations for the Support of Cognitive, Radio Systems; Cognitive Radio Resource Management and Dynamic Spectrum Sharing.