Coded Modulation for Hybrid ARQ with Mapping Rearrangement

In this work, we propose and analyze coded modulation (CM) schemes suitable for mapping rearrangement (MaRe) in Hybrid ARQ (HARQ). Two known MaRe schemes for 16-ary quadrature amplitude modulation (16-QAM) are first studied. We demonstrate that the performance of the studied CM receiver is intrinsically limited by the MaRe design and we propose iterative detection to improve the performance. Further, we propose to change the design of the mapping to take into account the property of the CM receiver and we obtain well appreciable gains over other detection schemes and known mapping designs.