摘要
在普通解码前传协同分集中,各协同用户之间的信道不对称性会对系统的性能产生一定的影响;同时,简单的重传信号并不是一种高效的利用协同分集的方式。该文提出了一种基于信号空间分集的解码前传协同方法,该方法的协同用户重传信号中包含自己的数据帧,并以信号空间分集的方法设计重传信号,这样既能够减小用户间信道的不对称性带来的影响,又提供了一种更为高效的信号分集方式。仿真实验结果证明该方法与非协同及普通解码前传协同方法相比能够获得更好的误码率性能。
In plain decode-and-forward （DF） cooperative diversity, asymmetric inter-user channel can have an impact on the performance of system and simple signal retransmission for each other is not an efficient diversity manner. In this paper, a new DF cooperative scheme based on signal-space diversity is propesed, in which the retransmission signals of each user always contain its own data frame and are designed in signal space diversity （SSD） manner. So the proposed scheme can defeat the effect of asymmetric inter-user channel and utilize diversity more efficiently. Simulation results prove that the new cooperative scheme achieves better bit error rate performance than both plain DF cooperative and non-cooperation scheme.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2009年第6期948-951,共4页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金(60602008)
国家863计划(2006AA01Z269)
关键词
协同分集
解码前传
迭代解码
信号空间分集
无线通信
cooperative diversity
decode-and-forward
iterative decoding
signal space diversity
wireless communication
