基于64-QAM的星座图重排高级混合ARQ技术
Advanced Hybrid ARQ Technique Employing a Signal Constellation Rearrangement Based on 64-QAM
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摘要: 本文介绍了一种适用于QAM调制的混合ARQ(HARQ)技术，该技术通过星座图重排，降低了多级调制造成的比特之间可靠性的差异，能够显著提高HARQ的性能。在此基础上针对64-QAM提出了一种新的四星座图重排方案，与原有的六星座图重排方案相比，新方案在降低复杂度的同时能够进一步提高HARQ的性能。Abstract: An advanced Hybrid ARQ (HARQ) technique applicable to QAM is presented in this paper, which employs signal constellation rearrangement to average the variations in bit reliabilities caused by QAM signal constellation. The presented scheme employs 4 constellation mapping rules for 64-QAM, and can achieve a noticeable gain in HARQ performance as well as a reduction in complexity compared to the existing constellation rearrangement scheme.
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Wengerter C H, von Elbwart A G E. Advanced hybrid ARQ technique employing a signal constellation rearrangement. VTC 2002-Fall，vol.4：2002-2006.[2]3GPP TS 25.212 v5.3.0(2002-12). Multiplexing and channel coding(FDD).[3]Panasonic, Enhanced HARQ method with signal constellation[4]rearrangement. 3GPP TSG RAN WG1, March 2001.[5]3GPP TR 25.848 v4.0.0 (2001-03).Physical layer aspects of[6]UTRA High Speed Downlink Packet Access.[7]Gu X Y, Li W Y, Niu K, et al..A universal efficient soft output algorithm for M-QAM. Demapper, Proceedings of ICCC'2004: 880-885. -
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