Two-way signal space cooperative network with a DF relay — Outage and optimization

2017 IEEE 8th Annual Ubiquitous Computing, Electronics and Mobile Communication Conference (UEMCON) Pub Date : 2017-10-01 DOI:10.1109/UEMCON.2017.8249105

Muhammad Ajmal Khan, R. Rao, Xianbin Wang

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Abstract

Two-way cooperative relay network links two source terminals using bidirectional connection to exchange information with the help of a relay. The conventional two-way cooperative network with a decode-and-forward (DF) relay takes six time slots to transfer four symbols due to half-duplex transmission. If signal space diversity is integrated into a conventional two-way cooperative network, the resultant system transfers four symbols in three time slots, which is referred to as two-way signal space cooperative network (2W-SSD-DF). In this paper, 2W-SSD-DF system is investigated for its outage performance and system optimization. Closed-form expression of the outage probability of 2W-SSD-DF system over Rayleigh fading channel is derived and its asymptotic expression is also obtained to study the influence of various system parameters. In addition, system optimization of the system is examined and a framework to allocate optimal power to the transmitting nodes is developed in order to enhance the outage performance of the system. Finally, the analytical work is validated through Monte Carlo simulations.

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具有DF中继的双向信号空间合作网络——中断与优化

双向协同中继网络是一种利用中继将两个源终端通过双向连接连接起来进行信息交换的网络。传统的双向合作网络采用半双工传输方式，采用DF中继传输4个符号，需要6个时隙。将信号空间分集集成到传统的双向协作网络中，得到的系统在三个时隙中传输四个符号，称为双向信号空间协作网络(2W-SSD-DF)。本文对2W-SSD-DF系统进行了停电性能研究和系统优化。推导了2W-SSD-DF系统在瑞利衰落信道上的中断概率的封闭表达式，并得到了其渐近表达式，研究了各种系统参数对中断概率的影响。此外，还研究了系统的优化问题，提出了一种分配传输节点最优功率的框架，以提高系统的停机性能。最后，通过蒙特卡罗仿真对分析结果进行了验证。

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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2017 IEEE 8th Annual Ubiquitous Computing, Electronics and Mobile Communication Conference (UEMCON)

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