Abstract:

A selection scheme is proposed for the cooperative transmission of multipleinput multipleoutput (MIMO) regenerative cooperative system. Single relay node is selected to maximize the minimumcase channel power gain among all relay nodes. Outage performance is analyzed through an approximate method. Under this selection scheme, a simple power allocation method is also developed for the sum power constrained network. Analysis and simulation demonstrate that this scheme can achieve a significant improvement in terms of outage performance. A distributed selection scheme is proven to have a good balance between the system performance and the implementation complexity. Therefore, it is a promising choice for practical utilization.

Key words: cooperative communication, decodeandforward, relay selection, power allocation