Journals Proceedings

Abstract

In this paper, the recently proposed physical layer network coding (PNC) scheme, compute-and-forward, is revisited. Detailed analysis is performed to reveal the practical problems or challenges of this relaying scheme. A very effective and efficient method is proposed to find the optimal integer coefficients to maximize the achievable rate. To obtain enough independent integer linear equations at the destination nodes to recover the messages, a multi-antenna receiving scheme is proposed. It is also revealed that for a general multi-way relay over Gaussian fading channel, joint maximum likelihood (ML) detection has a much better performance than compute-and-forward relaying scheme. Simulation results are also provided