On the DMT optimality of the rotate-and-forward scheme in a two-hop MIMO relay channel
Ramtin Pedarsani, Olivier Leveque, Sheng Yang · 2010
The rotate-and-forward scheme was introduced in (Yang-Belfiore, 2010) to recover spatial diversity in multi-hop MIMO relay networks. It was shown that this scheme achieves the optimal diversity-multiplexing (DMT) trade-off in a two-hop relay network, with two antennas at the relay node. In this paper, it is shown that the scheme is DMT optimal for arbitrary number of antennas at the source, relay, and destination node.