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

作　　者：顾昕钰[1] 王艺晨[1] 于笑博[1] 牛凯[1] 林家儒[1] 吴伟陵[1] 

机构地区：[1]北京邮电大学信息工程学院,北京100876

出　　处：《电子与信息学报》2005年第11期1686-1690,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60372099)

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。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.

关 键 词：混合自动重传请求 M-QAM TURBO编码 HSDPA 

分 类 号：TN929.5[电子电信—通信与信息系统]