用自适应双向中继叠加认知无线电系统

Amal Hyadi, Elmahdi Driouch, W. Ajib, Mohamed-Slim Alouini
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引用次数: 27

摘要

本文提出了一种基于两相双向中继协议的覆盖认知网络频谱共享机制。系统由两个主用户(pu)和两个从用户(su)组成。其中一个单元充当pu的中继,只要他遵守主系统的中断概率约束,就可以获得频谱共享。此外,我们认为中继节点执行最优的功率分配方案,以最小化备用接收器的中断性能。导出了译码转发(DF)、放大转发(AF)和自适应继电保护情况下的停电概率的封闭表达式。通过数值模拟对所得结果进行了说明和比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Overlay cognitive radio systems with adaptive two-way relaying
In this paper, we propose a spectrum sharing mechanism with a two-phase two-way relaying protocol for an overlay cognitive network. The system comprises two primary users (PUs) and two secondary users (SUs). One of the SUs acts as a relay for the PUs and gains spectrum sharing as long as he respects outage probability constraints of the primary system. Moreover, we consider that the relaying node performs an optimal power allocation scheme that minimizes the outage performance of the secondary receiver. Closed form expressions for the outage probability are derived for the cases of Decode-and-Forward (DF), Amplify-and-Forward (AF), and adaptive relaying. Numerical simulations are presented to illustrate and compare the obtained results.
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