【作者】 占敖； 何晨； 蒋铃鸽；

【Author】 ZHAN Ao;He Chen;Jiang Ling-ge;Department of Electronic Engineering,Shanghai Jiao Tong University;

【机构】 上海交通大学电子信息工程学院；

【摘要】 本文考虑了无线衰落信道中两个信源信宿对及单中继节点的两跳协同模型,在中继节点,两信息源端的发送符号在多接入信道中进行叠加并放大重发,在目的节点先消除其他用户的干扰,然后解码与其相对应的信源信息。通过复用增益与分集增益折衷理论分析,提出的机制相比传统的机制具有更优的性能。另外,我们给出了系统的中断概率闭式解析式和演绎出其速率优化问题,并且证明了在高的信噪比情况下,速率优化问题为凸优化问题。更多还原

【Abstract】 A two- hop fading system with two source- destination pairs and a single relay is considered in this paper.At the relay,the transmitted signals from two sources are overlapped and transmitted repeat after scaling the received signals over multiple access channel(MAC).At each destination,the corresponding informations are estimated after canceling the interference from the other user.The diversity- multiplexing tradeoff of the scheme is proved to outperform traditional schemes.Moreover we derive the closed- form expressions of outage probability of the scheme and formulate the optimized rate allocation issue.It is proved that it is a convex optimization issue under high signal- noise- radio(SNR) scenario.更多还原