A new relaying scheme for the MIMO relay network

In this paper, the multi-relays gain in the MIMO relay network is explained by the space rotation method. And in order to guarantee the multi-relays gain, a new structure of the signal processing matrix at relay nodes is pointed out. Then, a new relaying scheme, which is analogous to the SVD relaying scheme, is designed for the MIMO relay network. Numerical results show that the proposed relaying scheme not only obtains the multi-relays gain, but also is superior to the previous relaying schemes in the ergodic capacity perspective. The MIMO relay network, with multiple relay nodes and the amplify-and-forward relaying strategy is focused in this paper. However, the performance of the MIMO relay network is heavily dependent on the signal relaying scheme adopted by relay nodes.