基于中继选择的星地协作传输系统性能分析

doi:10.3969/j.issn.1001-506X.2020.01.27

系统工程与电子技术 ›› 2020, Vol. 42 ›› Issue (1): 198-205.doi: 10.3969/j.issn.1001-506X.2020.01.27

基于中继选择的星地协作传输系统性能分析

孔槐聪¹(), 林敏²(), 刘笑宇¹(), 吴雪雯¹(), 王金元²()

1. 南京邮电大学通信与信息工程学院, 江苏南京 210003
2. 南京邮电大学宽带无线通信与传感网技术教育部重点实验室, 江苏南京 210003

收稿日期:2019-07-04 出版日期:2020-01-01 发布日期:2019-12-23
作者简介:孔槐聪(1995-),男,硕士研究生,主要研究方向为卫星通信、通信信息处理和协作通信。E-mail:khc_dream@163.com|林敏(1972-),男,教授,博士,主要研究方向为无线/卫星通信网络架构、基础理论与关键技术和无线通信中的智能信号处理。E-mail:linmin@njupt.edu.cn|刘笑宇(1996-),男,博士研究生,主要研究方向为协作通信、卫星通信和绿色通信。E-mail:bboyxiaoyu@yeah.net|吴雪雯(1995-),女,硕士研究生,主要研究方向为卫星通信及物理层安全。E-mail:wuxuewen1995@163.com|王金元(1986-),男,副教授,博士,主要研究方向为无线光通信和可见光通信、无线通信、移动通信。E-mail:jywang@njupt.edu.cn
基金资助:
重点国际合作项目(61720106003);国家自然科学基金(61701254);江苏省自然科学基金(BK20170901);江苏省研究生科研与实践创新计划项目(KYCX19_0950);江苏省研究生科研与实践创新计划项目(SJCX18_0276)

Performance analysis of hybrid satellite-terrestrial cooperative transmission system based on relay selection

Huaicong KONG¹(), Min LIN²(), Xiaoyu LIU¹(), Xuewen WU¹(), Jinyuan WANG²()

1. College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
2. The Key Laboratory of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Received:2019-07-04 Online:2020-01-01 Published:2019-12-23
Supported by:
重点国际合作项目(61720106003);国家自然科学基金(61701254);江苏省自然科学基金(BK20170901);江苏省研究生科研与实践创新计划项目(KYCX19_0950);江苏省研究生科研与实践创新计划项目(SJCX18_0276)

摘要/Abstract

摘要：

由于星地混合协作网络（hybrid satellite-terrestrial cooperative network，HSTCN）能显著提升卫星通信的服务质量，近年来受到了国内外学者的广泛关注，分析了基于中继选择的星地协作传输系统的性能。首先，在卫星和地面用户之间存在直达链路，并且所有中继节点在采用门限判断译码转发协议辅助卫星通信的情况下，得到用户端经过最大比合并后的输出信噪比（signal-to-noise ratio，SNR）表达式。其次，针对卫星信道服从阴影莱斯分布，而地面信道服从Nakagami-m分布，推导出随机选择和最佳选择两种中继选择策略下系统的中断概率闭合表达式。接着，进一步得到高信噪比条件下中断概率的近似表达式，为分析各种参数对系统性能的影响提供了更加便捷的方法。最后，计算机仿真不仅验证了理论推导的正确性，而且定量分析了协作传输带来的好处，从而为HSTCN技术的实际应用提供理论依据。

关键词: 星地混合协作网络, 译码转发, 中继选择, 性能分析

Abstract:

Hybrid satellite-terrestrial cooperative network (HSTCN) has recently become an attractive research topic due to its potential to improve the quality-of-service of satellite communication. This paper investigates the outage performance of the considered HSTCN based on relay selection. First, by assuming that the maximum ratio combining is utilized at the destination, we obtain the end-to-end signal-to-noise ratio (SNR) by adopting the threshold-based decode-and-forward relay strategy in case that there is a direct link between the satellite and the terrestrial users. Next, the closed-form expressions for outage probability of the considered system with random selection and optimal selection schemes are derived, where the satellite links undergo shadowed-Rician fading, while the terrestrial links follow Nakagami-m fading. Furthermore, the asymptotic outage probability formulas at a high SNR are also developed to reveal the effects of representative parameters on the system performance conveniently. Finally, numerical results confirm the validity of the theoretical formulas and quantitatively analyze the benefits of cooperative transmission, thus providing a theoretical basis for the practical application of the HSTCN technology.

Key words: hybrid satellite-terrestrial cooperative network (HSTCN), decode-and-forward, relay selection, performance analysis

中图分类号:

TN927

孔槐聪, 林敏, 刘笑宇, 吴雪雯, 王金元. 基于中继选择的星地协作传输系统性能分析[J]. 系统工程与电子技术, 2020, 42(1): 198-205.

Huaicong KONG, Min LIN, Xiaoyu LIU, Xuewen WU, Jinyuan WANG. Performance analysis of hybrid satellite-terrestrial cooperative transmission system based on relay selection[J]. Systems Engineering and Electronics, 2020, 42(1): 198-205.

图/表 5

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参数	数值
卫星轨道	静止轨道
工作频率f/GHz	2
最大卫星天线增益G^S_max/dB	53
噪声带宽B/MHz	5
噪声温度T/K	300
3 dB角度/(°)	0.4
HS	$\left\{\lambda_{\ell}, b_{\ell}, {\mathit{\Omega}}_{\ell}\right\}_{\mathrm{HS}}$={2, 0.063, 0.000 5}
AS	$\left\{\lambda_{\ell}, b_{\ell}, {\mathit{\Omega}}_{\ell}\right\}_{\mathrm{AS}}$={5, 0.251, 0.279}

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基于中继选择的星地协作传输系统性能分析

Performance analysis of hybrid satellite-terrestrial cooperative transmission system based on relay selection

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