A Novel Reconfigurable Mapping of Physical-Layer Network Coding With M-QAM

In this letter, a novel reconfigurable mapping (RM) scheme for a physical-layer network coding (PNC) system based on M-ary quadrature amplitude modulation (M-QAM) is proposed. To solve the ambiguity problem, key expressions were given in our system, efficient algorithms were designed, and corresponding mapping rule tables were developed. This technique offers significant advantages over other technologies. Simulation results demonstrate that the RM-16QAM scheme provides a gain of 2.4 dB compared to alternative schemes, while the RM-64QAM strategy confers a notable gain of 6.3 dB over the conventional scheme.