Systems Engineering and Electronics ›› 2020, Vol. 42 ›› Issue (1): 198-205.doi: 10.3969/j.issn.1001-506X.2020.01.27

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

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

  1. 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)

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

CLC Number: 

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