Hot topic: physical-layer network coding
Proceedings of the 12th annual international conference on Mobile computing and networking
Optimized constellations for two-way wireless relaying with physical network coding
IEEE Journal on Selected Areas in Communications - Special issue on network coding for wireless communication networks
Channel coding and decoding in a relay system operated with physical-layer network coding
IEEE Journal on Selected Areas in Communications - Special issue on network coding for wireless communication networks
Superimposed XOR: a new physical layer network coding scheme for two-way relay channels
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
IEEE Transactions on Information Theory
Spectral efficient protocols for half-duplex fading relay channels
IEEE Journal on Selected Areas in Communications
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We study the application of convolutional codes to two-way relay networks (TWRNs) with physical-layer network coding (PNC). When a relay node decodes coded signals transmitted by two source nodes simultaneously, we show that the Viterbi algorithm (VA) can be used by approximating the maximum likelihood (ML) decoding for XORed messages as two-user decoding. In this setup, for given memory length constraint, the two source nodes can choose the same convolutional code that has the largest free distance in order to maximize the performance. Motivated from the fact that the relay node only needs to decode XORed messages, a low complexity decoding scheme is proposed using a reduced-state trellis. We show that the reduced-state decoding can achieve the same diversity gain as the full-state decoding for fading channels.