摘要
协作通信技术可以提高系统的分集增益,从而降低接收端的误比特率。而在各个节点配置多个天线能够进一步提高系统性能,但也会带来空间干扰等问题。针对MIMO协作通信系统存在信道估计误差情况下的编码问题进行了研究,提出了一种迭代的联合编码方法。该方法联合考虑协作节点和接收节点的编码矩阵,以系统误码率最小化为目标,将信道估计误差考虑到协作节点和接收节点的编码矩阵。仿真结果表明,所提算法有效抵抗了信道估计误差对系统性能的有害影响。
Relay communication technology can improve diversity gain of the system, and thus reduce bit error ratio of the receiving end. And the multiple antenna configuration in each node can further enhance the system performance, but also cause some problems such as space interference For the existence of channel estimation error in MIMO cooperative system, a joint precoding algorithm is proposed. The effect of channel estimation error on the system performance is considered, and with MMSE criterion, the joint precoding at source node and relay node designed. This algorithm is robust to channel estimation error, and the theory and simulation show that the proposed algorithm could reduce the bad effect caused by channel estimation error while is of much lower complexity.
出处
《通信技术》
2013年第2期12-15,共4页
Communications Technology
