A Cooperative MARC Scheme Using Analogue Network Coding to Achieve Second-Order Diversity
A Multiple Access Relay Channel (MARC) is considered in which an analogue-like network coding is implemented in the relay node. This analogue coding is a simple addition of the received signals at the relay node. Using "Nulling detection" structure employed in V-BLAST receiver, the authors propose a detection scheme in the destination which is able to provide a diversity order of two for all users. They analytically evaluate the performance of their proposed scheme for the MARC with two users where tight upper bounds for both un-coded and Convolutionally coded transmission blocks are provided.