摘要
为了提高双向中继系统的系统可达总速率,提出一种Two-way AF中继系统的最大化瞬时信噪比乘积(MISP)的中继选择策略,该策略联合考虑了两条链路的链路质量,实现了最优中继选择。在此基础上,运用信噪比平衡技术进行瞬时功率分配(SNR-Balancing-IPA),推导出了最优功率分配方案的表达式。理论分析和仿真结果都表明,建议的最大瞬时信噪比乘积中继选择及SNR-Balancing-IPA的策略有效提高了系统的可达总速率,降低了系统的中断概率,改善了系统的性能。
In order to improve the sum-rate of two-way relay system, this paper proposes a relay selection scheme which maxi- mizes the product of the instantaneous Signal Noise Rate （SNR） in two-way Amplify-and-Forward （AF） relay system. The scheme selects the optimal relay through joint considering the quality of the two links. Based on the optimal relay selection, the system conducts Instantaneous Power Allocation by using the technology of SNR Balancing（SNR-Balaneing-IPA）. The expression of the optimal power allocation is derived. The theoretical analysis and simulation results show that the proposed relay selection of the product of the maximum instantaneous SNR and SNR-Balancing-IPA strategy can effectively improve the sum rate of sys- tem, reduce the outage probability of the system and improve the performance of the system.
出处
《计算机工程与应用》
CSCD
2013年第11期84-87,104,共5页
Computer Engineering and Applications
关键词
双向放大转发中继
中继选择
信噪比平衡技术
功率分配
two-way amplify-and-forward relay
relay selection
Signal Noise Rate（SNR） balancing technique
power allocation
