A new channel coding network coding scheme for two-way relay

In this paper, after a brief review of all the channel coded physical layer network coding (PNC) schemes, we introduce the definition of compatibility of channel code and lattice code, and provide a methodology with which the standard joint channel coding lattice coding (JCCNC) scheme can be applied to general types of pulse amplitude modulation (PAM) and quadrature amplitude modulation (QAM) modulation systems. We also propose a new scheme for two-way relay systems called lattice decoding joint channel coding network coding scheme (LDJCCNC). Compared with the existing schemes, this new scheme has the advantage of less complexity, not requiring the channel information, and being able to be conveniently applied to general types of PAM and QAM modulation systems. Simulation results show that this new channel coded PNC scheme has good performance and its performance is better than the standard channel coded network coding scheme when the channel information is unknown or misestimated.