不同解码方案下的星地融合网络混合多址接入性能分析

戴叶玲; 郭焱; 朱丽文; 刘笑宇; 丁昌峰; 林敏

doi:10.11999/JEIT240176

不同解码方案下的星地融合网络混合多址接入性能分析

doi: 10.11999/JEIT240176

1.
南京邮电大学通信与信息工程学院南京 210003
2.
展讯半导体(南京)有限公司南京 211899

基金项目: 国家自然科学基金(62471255)，东南大学移动通信全国重点实验室开放研究基金(2024D11)，江苏省研究生科研与实践创新计划(KYCX24_1178),南京邮电大学引进人才科研启动基金(NY223024)

详细信息

作者简介:
戴叶玲：女，博士生，研究方向为无线通信中的信号处理和性能分析等

郭焱：女，博士生，研究方向为无线通信系统的优化设计与性能分析等

朱丽文：女，硕士，研究方向为无线通信中的物理层安全技术等

刘笑宇：男，讲师，研究方向为新一代宽带无线通信系统物理层传输、组网中涉及的理论与方法等

丁昌峰：男，讲师，研究方向为边缘计算和通感一体化融合技术等

林敏：男，教授，研究方向为无线通信系统、通信信号处理等

通讯作者:
林敏　linmin@njupt.edu.cn

中图分类号: TN925
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- 被引次数: 0
出版历程
- 收稿日期: 2024-03-15
- 修回日期: 2024-07-19
- 网络出版日期: 2024-08-03
- 刊出日期: 2024-09-26

Performance Analysis of Hybrid Multiple Access in Integrated Satellite-Terrestrial Networks with Different Decoding Schemes

1.
College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
2.
Spreadtrum Semiconductor (Nanjing) Company Limited, Nanjing 211899, China

Funds: The National Natural Science Foundation of China (62471255), The Open Research Fund of National Mobile Communications Research Laboratory, Southeast University (2024D11), The Postgraduate Research and Practice Innovation Program of Jiangsu Province (KYCX24_1178),The Talent Research Start-up Foundation of Nanjing University of Posts and Telecommunications (NY223024)

摘要

摘要: 该文针对地面中继辅助的星地融合网络(ISTNs)，分析了卫星采用不同解码方案时系统性能的差异。首先，提出一种新颖的用户配对方案，通过位置信息将卫星波束覆盖范围内的多个用户分为若干个组。接着，为了提高传输可靠性以及频谱利用率，用户采用混合多址接入技术与卫星进行通信。进一步，在考虑用户-地面中继链路服从Nakagami-m分布，地面中继-卫星链路服从相关阴影莱斯分布的情况下，分别推导出基于连续干扰消除(SIC)和联合解码(JD)两种解码方案的系统中断概率和吞吐量的闭合表达式。最后，计算机仿真验证了理论分析的正确性和所提方案相比正交多址(OMA)方案的优越性，并揭示了JD解码技术在ISTNs中的可行性。
- 星地融合网络 /
- 用户配对方案 /
- 混合多址接入 /
- 连续干扰消除 /
- 联合解码
Abstract: The performance differences are investigated for terrestrial relay-assisted Integrated Satellite-Terrestrial Networks (ISTNs) when satellite employs different decoding schemes. Initially, a multi-user pairing scheme leveraging location information is proposed, and multiple users within the coverage area of satellite beam are divided into several groups. To improve transmission reliability and spectral efficiency, users communicate with satellite employing hybrid multiple access. Additionally, assuming that user-terrestrial relay links obey Nakagami-m fading while terrestrial relay-satellite link follows correlated shadowed-Rician fading, the closed-form expressions of outage probability and throughput are derived when the satellite adopts Successive Interference Cancellation (SIC) and Joint Decoding (JD) respectively. Finally, computer simulations validate the correctness of the theoretical analysis and the superiority of the proposed scheme compared with Orthogonal Multiple Access (OMA), and reveal that JD decoding scheme is feasible in the ISTNs.
- Integrated Satellite-Terrestrial Networks(ISTNs) /
- Multi-user pairing scheme /
- Hybrid multiple access /
- Successive Interference Cancellation(SIC) /
- Joint Decoding(JD)

HTML全文

图 1 系统模型图

下载: 全尺寸图片幻灯片

图 2 不同天线数时中断概率随发射功率变化的曲线

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图 3 不同方案下中断概率随功率分配系数变化的曲线

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图 4 不同方案下吞吐量随发射功率变化的曲线

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图 5 不同方案下吞吐量与天线数的关系图

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表 1 常用变量含义表

符号	含义	符号	含义
${P_l}$	NOMA组内两用户的发射总功率	$ {P_{\mathrm{R}}} $	地面中继的发射功率
${d_i}$	用户到地面中继接收端的距离	${d_{{\mathrm{RS}}}}$	地面中继到卫星的距离
${d_{\mathrm{e}}}$	ULA阵元间隔	${R_{l,i}}$	用户的可达速率门限值
${\theta _i}$	用户到地面中继的到达角	$ {\theta _{{\text{RS}}}} $	地面中继到卫星的到达角
${{\boldsymbol{h}}_i}$	用户到地面中继之间的信道	${{\boldsymbol{h}}_{{\mathrm{RS}}}}$	地面中继到卫星之间的信道
${{\boldsymbol{w}}_l}$	归一化接收波束成形权矢量	${{\boldsymbol{w}}_{{\mathrm{RS}}}}$	归一化发射波束成形权矢量

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表 2 系统参数设置

参数	数值	参数	数值
卫星运行轨道	GEO	3 dB波束角度${\theta _{3\;{\mathrm{dB}}}}\left( ^\circ \right)$	0.4
载波频率$ f\left( {{\mathrm{GHz}}} \right) $	2	带宽$ B\left( {{\mathrm{MHz}}} \right) $	5
卫星波束最大增益$ {G^{\max }}\left( {{\mathrm{dB}}} \right) $	53	噪声温度$ T\left( {\mathrm{K}} \right) $	300

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