Performance analysis of a satellite–multi-terrestrial relay network with hardware impairments using switch-and-stay combining scheme

Kefeng Guo,Bangning Zhang,Daoxing Guo,Yuzhen Huang

doi:10.1177/1550147717732932

Abstract

Space information networks are proposed to broaden the observation area and realize continuous information acquisition using satellites and high-altitude platform stations. Space information networks are able to enhance detection and transmission capabilities compared to the current single Earth observation satellite. The satellite–terrestrial network is an important component of the space information networks. Hence, the major contribution of this article is to propose a new transmitted link selection scheme in a satellite–terrestrial network. Switch-and-stay combining scheme is used by destination to have a trade-off between the complexity and efficiency. The satellite, terrestrial relays, and destination user are influenced by hardware impairments, respectively. The closed-form expressions for the outage probability and throughput are derived. In order to analyze the system performance at high signal-to-noise rate, the asymptotic expressions for the system performance are also derived to give a special view on the impact of hardware impairments on the considered network. What is more, numerical results are derived to verify the correctness of our analytical results.

Highlights

With the fast development of space exploration, the space information network (SIN) becomes an attractive and hot research field.[1,2,3,4,5,6] The concept of SIN was first proposed in 1998
Because partial relay selection is used in the first hop of S-R-D link, with the help of equation (6), the cumulative distribution function (CDF) of g1 is given by equation (24)
The outage probability of two channel conditions is same at high signal-tonoise rates (SNRs), which just has the relation with the impairments level

Summary

Introduction

With the fast development of space exploration, the space information network (SIN) becomes an attractive and hot research field.[1,2,3,4,5,6] The concept of SIN was first proposed in 1998. We demonstrate analytically that using a simple relay ET selection scheme, it is possible to significantly lower the outage probability and achieve improvement in the diversity gain and the performance of the considered system In satellite systems, this performance gain is very important because by achieving this gain, satellite needs to transmit less power (approximately half for 3 dB SNR improvement), which can help in reducing the dimensions and weight and subsequently cost of the satellite system.

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Conclusion