摘要
在多中继放大转发协作通信中,以系统平均中断概率最小化为目标,提出了中继选择策略的删余改进算法.新引入中继节点门限,并根据信道统计特性逐个删除高于该门限的中继节点,使剩余中继节点协作转发,从而获得较高的性能.并针对该算法提出了次优功率分配.仿真表明,所提算法的中断概率相比于其它中继数目情况是最小的,其中断性能在任何信噪比时都优于全及单中继转发算法.在中断概率为10^(-3)时,与全中继转发及单中继转发方案相比,分别有近3.28dB和3.72dB信噪比增益,且次优功率分配具有更好中断概率性能.
In the multi-relay amplify and forward cooperative communications, a puncturing improve- ment algorithm is proposed for the relay selection strategy to minimize the probability of the systematical average interruption. It introduces a new relay node selection threshold and punctures the node one by one with the above the relay node threshold according to channel statistics. So the remain relay nodes cooperatively forward and obtain high performance. In addition, it also puts forward an approx- imate optimal power allocation for the proposed algorithm. Simulation results show that the interrup- tion probability of the proposed algorithm is always kept to a minimum level in any SNR, when com- pared with those of the other cases of the relay scheme. And it has better interruption probability than that of the whole or single relaying algorithm. When the interruption probability is 10-3 , it obtains 3.28 dB and 3. 72 dB SNR gain respectively compared with the all-relay and single-relay scheme. Moreover, the sub-optimal power allocation of the proposed scheme has much better interruption probability performance.
作者
陈磊
刘顺兰
包建荣
CHEN Lei LIU Shunlan BAO Jianrong(School of Communication Engineering, Hangzhou Dianzi University, Hangzhou Zhejiang 310018, China)
出处
《杭州电子科技大学学报（自然科学版）》
2017年第3期20-23,28,共5页
Journal of Hangzhou Dianzi University：Natural Sciences
基金
国家自然科学基金资助项目(61471152)
浙江省自然科学基金资助项目(LZ14F010003)
关键词
放大转发
中继选择
中断概率
删余改进
amplification repeater
relay selection
interruption probability
puncturing improvement
