A Practical Physical-Layer Network Coding Scheme for the Uplink of the Two-Way Relay Channel
In this paper, the authors consider the two-way relay channel with the two-phase protocol. In the first phase, two terminals simultaneously transmit their packets to the relay, creating a Multiple-Access Channel (MAC), while in the second phase the relay sends a network-coded combination of the two packets to both terminals. They focus on the multiple-access phase and propose a practical decoding scheme based on practical binary block codes in order to obtain the combined packet at the relay. This scheme is found to perform well for a wide range of code rates and is superior to lattice coding at low rates.