基于网络编码的中继方案及其最优功率分配  

Optimal power allocation for a relaying scheme based on network coding

作　　者：季彦呈[1] 葛建华[1] 高洋[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,西安710071

出　　处：《吉林大学学报（工学版）》2011年第1期259-263,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：'863'国家高技术研究发展计划项目(2006AA01Z270);广东省-国家自然基金委联合基金项目(U0635003);陕西省自然科学基金项目(2007F07)

摘　　要：提出了一种基于网络编码的无线中继方案,并通过研究该方案下系统的中断概率,给出了最优功率分配的策略。根据MPSK调制的相位特性,在中继节点和基站直接以调制后的符号进行编码和译码,利用对系统中断概率的分析,推出了高信噪比下中断概率的上界,通过分析最小化中断概率的上界,得出最优功率分配的策略。仿真结果表明,本文方案性能要优于传统的中继方案,并且最优功率分配下的系统能够获得明显的性能增益。A relaying scheme based on network coding was proposed. After investigating the system outage probability with this relaying scheme, an Optimal Power Allocation （OPA） strategy was given. According to the phase characteristic of M-ary Phase-Shift-Keying （MPSK） modulation, network coding and decoding with PSK signal can be directly implemented at the relay node and base station. Through analysis, the upper bound of the outage probability under high Signal-to-Noise Ratio （SNR） was derived. By minimizing the upper bound, an OPA strategy was obtained. Simulation results show that the performance of the proposed scheme is better than that of the traditional one. The system with OPA strategy can achieve significant gains in Symbol Error Rate （SER） performance.

关 键 词：通信技术 中继通信 网络编码 中断概率 最优功率分配 

分 类 号：TN925[电子电信—通信与信息系统]