Robust Joint Precoding Algorithm in MIMO Cooperative System
Liping Li · Communications technology · 2013
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.