协作通信中基于DSTC的自适应能量分配方案  

Adaptive Energy Distribution Strategy Based on Distributed Space-time Codes for Cooperative Communication Systems

作　　者：裘佩佩[1] 李正权[1,2] 金小萍[1] 

机构地区：[1]中国计量学院信息工程学院,浙江杭州310018 [2]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《电视技术》2014年第19期150-154,共5页Video Engineering

基　　金：国家自然科学基金项目(60902011;61071119);东南大学国家移动通信研究实验室开放性研究基金项目(2011D18);中国博士后科学基金项目(2012M511175);浙江省自然科学基金项目(LQ12F01010)

摘　　要：基于协作AF(Amplify and Forward)通信模型,提出了一种基于分布式空时分组码的自适应能量分配方案。该方案首先以最小化中断概率为准则,在源节点与中继节点之间根据信道状态信息情况,决定是否放大转发中继节点接收信号。然后,在中继节点采用最优功率分配策略,实现整个系统的最优化传输。仿真显示了所提出的两种自适应方案与传统自适应方案、非自适应方案,以及在不同调制制度下的性能比较。仿真结果表明,与传统非自适应方案相比,所提方案1的误码率性能提高了约5 d B。An adaptive power allocation strategy based on distributed space time block codes with AF （Amplify and Forward） is proposed in this paper. The method aims to minimize the outage probability, whether the signals between a source node and relay nodes to be amplified and forward transmitted dependents on the channel state information. Accordingly, the relay node utilizes an optimal power distribution to achieve optimization for the whole transmission system. Simulation demonstrates that the bit error rate performance comparison among the two proposed adaptive schemes, traditional adap- tive scheme, non-adaptive scheme and the proposed schemes with different modulation respectively. The results show that the bit error rate of the scheme one in this paper has improved nearly 5 dB compared to the traditional non-adaptive scheme.

关 键 词：协作中继 自适应能量分配 分布式空时编码 

分 类 号：TN914[电子电信—通信与信息系统]