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1. 西安电子科技大学 综合业务网理论及关键技术国家重点实验,陕西 西安 710071
2. 华侨大学 信息科学与工程学院,福建 厦门 361021
3. 96401部队,陕西 宝鸡 721000
4. 通信网信息传输与分发技术重点实验室,河北 石家庄 050002
[ "李琪(1982-),男,湖北孝感人,西安电子科技大学博士生,主要研究方向为编码调制技术、无线通信。" ]
[ "周林(1982-),男,河南南阳人,华侨大学讲师、硕士生导师,主要研究方向为编码调制技术、无线通信等。" ]
[ "张博(1982-),男,陕西西安人,西安电子科技大学博士生,主要研究方向为干扰信道容量及传输策略。" ]
[ "白宝明(1966-),男,山西大同人,西安电子科技大学教授、博士生导师,主要研究方向为信息与编码理论、编码调制技术、无线通信和量子通信。" ]
网络出版日期:2015-06,
纸质出版日期:2015-06-25
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李琪, 周林, 张博, 等. 适用于BICM-ID系统的星座成形方法[J]. 通信学报, 2015,36(6):149-156.
Qi LI, Lin ZHOU, Bo ZHANG, et al. Simple constellation shaping for BICM-ID[J]. Journal on communications, 2015, 36(6): 149-156.
李琪, 周林, 张博, 等. 适用于BICM-ID系统的星座成形方法[J]. 通信学报, 2015,36(6):149-156. DOI: 10.11959/j.issn.1000-436x.2015117.
Qi LI, Lin ZHOU, Bo ZHANG, et al. Simple constellation shaping for BICM-ID[J]. Journal on communications, 2015, 36(6): 149-156. DOI: 10.11959/j.issn.1000-436x.2015117.
结合几何成形与概率成形的思想,提出了一种适用于比特交织编码调制系统的星座成形映射方法。该方法基于实用信号星座,通过不使用部分能量较大的信号点并利用多对一的映射关系,使发送信号逼近最佳输入概率分布。利用解调器和译码器之间的迭代译码,该方法可方便地获得成形增益。基于容量和外信息转移图分析,给出了信号星座和信号到符号映射的优化方法。理论分析和仿真结果表明,在高斯白噪声信道和独立Rayleigh衰落信道下,该映射方法利用大信号星座在采用迭代译码的比特交织编码调制系统中均能取得优于传统 Gray 映射的误码性能,且随着调制阶数的增大可进一步提高成形增益。
A novel method of constellation mapping is presented for bit-interleaved coded modulation (BICM) by combining geometry shaping with probabilistic shaping.The transmitted signal points of a practical signal constellation approach the optimal input distribution by exploiting a many-to-one mapping with some signal points unused.With this method
shaping gain can be achieved conveniently with the help of iterative decoding between demodulation and decoder.The optimizations of signal constellation and the mapping from symbols to signal points are performed by the analysis of capacity and the extrinsic information transfer chart.Simulation results show that the proposed constellation mapping outperforms the traditional Gray mapping for BICM with iterative decoding in both AWGN and Rayleigh channels.And the shaping gain achieved can be improved with the increase of the constellation size.
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