Enhanced Bidirectional Relaying Schemes for Multi-Hop Communications

This paper focuses on bidirectional relaying schemes for multi-hop communications. For a two hop communication system, Traditional 4-step Bidirectional Relaying (TBR) method allocates 4 slots, resulting in low efficiency; Coded Bidirectional Relaying (CBR) method, making use of network coding, needs only 3 slots, can provide throughput improvement up to 33% compared with TBR method; Two-way relaying method performs data bidirectional relaying with 2 slots, by employing interference cancellation algorithms in the relay station, can further improve spectrum efficiency.