解码转发下中继不同行为对系统性能的影响  

The Impact to System Performance with Different Behavior of Relay Under Decode-and-Forward

作　　者：张成凯[1] 付晓梅[1] 王鼎宇 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《南开大学学报（自然科学版）》2015年第4期12-15,20,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：863项目(2011AA010201)

摘　　要：基于3节点协作通信模型,考虑在实际环境非完全正确解码转发情形下,中继协作转发对系统性能的影响.在此基础上,研究了中继的自私行为、恶意发送噪声行为对系统性能的影响.结果表明非正确解码转发的协作对系统性能有较大提升,甚至在中继自私的情形下也有助于系统性能.中继的恶意发送噪声行为在传统的最大比合并下会随着中继功率的增大而降低系统性能,而采用等效信噪比合并方法可以避免恶意行为对系统性能的影响.Based on three-node model, in an actual environment, it is considered that collaboration relay forwarding＇s impact on system performance under the condition that a relay may receive signal with error with decode-and-forward （DF）. Based on this condition, the impact of relay＇s Selfish and malicious behavior are studied to system performance. The partially incorrect cooperative relay would improve the performance with the increase of the relay＇s power. Selfish behavior of relay would affect system performance, but compare with non-relaying, its performance is also improved. Malicious behavior makes the system performance decline with the power of relay increases in the traditional MRC, while the equivalent SNR merger would avoid the impact of malicious behavior in the system.

关 键 词：解码转发(DF) 中继行为 信噪比 误码率 

分 类 号：TN925[电子电信—通信与信息系统]