摘要
为了有效提高中继信道的数据传输速率,在全工和半双工模式下分别对中继和目的端带相关噪声的高斯双天线中继信道进行研究。通过计算得出信道容量的上界和在译码前传、压缩前传和放大前传三大中继策略下的可达速率,并给出分别对应于传统退化高斯中继信道和逆退化高斯中继信道的两种容量可达情形。运用MAT-LAB对不同信道设定的各类可达速率进行仿真,数值分析结果显示:尽管译码前传完全忽视了噪声相关性,然而另外两种策略能潜在地利用这些边信息;对于不同的噪声相关系数,三种中继策略中没有一种总是优于其它策略;中继采用双天线技术,具有提高传输速率的作用。
To improve the rate of transmitting data efficiently,focusing on the Gaussian two-antenna relay channels in full-duplex and half-duplex mode,where the noises at the relay and destination are arbitrarily correlated.Firstly,it derived the capacity upper bound and the achievable rates with three schemes： Decode-and-Forward（DF）,Compress-and-Forward（CF）,and Amplify-and-Forward（AF） through the calculation;then gave two capacity achievable results,the channel is equivalent to the traditional Gaussian degraded relay channel and the Gaussian reversely-degraded relay channel,respectively.The simulation on achievable rates is done using MATLAB in different channels,and analysis results show that despite DF completely disregards the noise correlation,the other two strategies,however,can potentially exploit such extra information;besides,none of the three relay schemes always outperforms the others over different correlation coefficients;moreover,the use of two-antenna technology at relay can improve the rate of transmitting data.
出处
《西安邮电学院学报》
2012年第6期12-19,共8页
Journal of Xi'an Institute of Posts and Telecommunications
基金
国家自然科学基金资助项目(60972041
60972045)
关键词
高斯双天线中继信道
相关噪声
可达速率
容量上界
Gaussian two-antenna relay channel
correlated noise
achievable rate
capacity upper bound
作者简介
袁妍（1987--），女，硕士研究生，研究方向为信息处理理论与应用。E-mail：19870228meng@163．com
赵君喜（1963～），男，教授，博士，从事通信信号处理研究。E-mail：junxizhao@163．com
