Design and Analysis for Physical-Layer Network Coding with Reconfigurable Superposition Mapping
Jiaqi Li, Meng Tang, Hao Wang, Jianhua Chen, Yongtao Yu · 2022
For Physical-layer Network Coding (PNC) with high-order modulation, the problem of ambiguity mapping is a focus field. In this paper, we present a PNC with Reconfigurable Superposition Mapping (RSM-PNC) scheme. Based on this scheme, a two-way relay communication system model consisting of the source and relay nodes using 16QAM modulation is constructed. In addition, the PNC demodulation and mapping rule at the relay node is displayed, the decoding rule at source node is redesigned, and the calculation formula of relay symbol error rate (SER) under Additive White Gaussian Noise (AWGN) is derived as well. The simulation results show that the proposed RSM-PNC scheme not only solves the problem of ambiguity mapping, but also has more advantages compared with PNC using Hierarchical Modulation scheme.