Institute of Electrical & Electronic Engineers
The authors consider the Multi-Way Relaying (MWR) network, where each user communicates with the other users through a relay. The single-antenna users transmit to the multi-antenna relay simultaneously. Then the relay randomly pre-codes the received or estimated signal, and broadcasts it back to all the users. Focusing on a specific user, they set up the equivalent space-time channel from the other users to it. Afterwards, for both amplify-and-forward and estimate-and-forward MWR, they design the ordered Minimum Mean Square Error (MMSE) receivers with Successive Interference Cancellation (SIC) at users. In particular, three types of metrics determining the order of SIC are derived by approximating the interference-plus-noise term as Gaussian.