机构地区: 中国科学技术大学
出 处: 《中国科学院研究生院学报》 2012年第1期88-93,共6页
摘 要: 提出一种分析中继选择反馈错误影响的方法,给出反馈错误与目的节点接收信噪比的近似表达式.基于该表达式,给出数据传输和信息反馈2个阶段的功率分配方案,以最大化数据传输速率的上界.仿真结果显示,所提功率分配方案能够有效提高数据传输速率,且表明有噪反馈下中继数量受到限制. An analytical framework is proposed to analyze the effect of feedback error and the closed-form SNR expression is derived.Based on the closed-form expression,the power allocation between the feedback and data transmission stages is given to maximize the achievable rate upper bound.Simulation results show that the achievable rate can be effectively improved by the proposed power allocation and the relay number is limited with noisy limited feedback.