Known-interference aware iterative MMSE filter design for non-regenerative multi-way relaying

A multi-way relaying scenario is considered. Each node has to transmit an individual message and has to receive the messages of all other nodes. These multi-way communications between the multi-antenna nodes are performed via an intermediate non-regenerative multi-antenna relay station. An iterative MMSE approach is proposed to jointly design the transceive filter at the relay station and the receive filters at the nodes. For this approach, self- as well as known-interference cancellation are exploited at the nodes and are considered for the derivation of the relay transceive filter. The proposed iterative MMSE approach achieves significantly higher sum rates compared to conventional approaches.