摘要
星座成形技术是通信系统的关键技术之一,可以通过成形技术来获得成形增益.然而,近年提出的定型概率幅度成形方案仅适用于方形星座调制,不适用于一般结构的二维星座.为此,本文提出了适用于一般二维星座的定型匹配成形编码调制方案,其可以直接应用于实际工程中任意对称结构的二维星座.在此基础上,针对5G低密度校验(Low-Density Parity-Check,LDPC)码的打孔特性进行特殊设计,提出了基于定型匹配成形的5G LDPC编码调制方案.仿真结果表明:(1)本文提出的基于定型匹配成形的二维编码调制方案与通常的概率幅度成形方案性能相一致,且所提方案具有更好的二维星座普适性;(2)本文提出的基于定型匹配成形的5G LDPC编码调制方案可以获得约0.6 dB的成形增益和约0.5 dB的打孔增益(相比于非打孔设计).
Constellation shaping,one of the key techniques for the communication systems,can provide shaping gain.However,recently proposed constant composition distribution matching(CCDM)probabilistic amplitude shaping(PAS)scheme is only suitable for square constellation modulation but not for general structured 2D constellation.This paper pres⁃ents a generalized CCDM shaping,which can be directly applied to any 2D constellation with a symmetric structure.Fur⁃thermore,taking into account the 5G low-density parity-check(LDPC)standard(especially for the puncture structure),the presented CCDM shaping is combined with the 5G LDPC codes,resulting in a 5G LDPC coded shaping modulation scheme.The numerical results show that the performance of the proposed scheme is consistent with that of the conventional PAS scheme.The simulation results also show that the proposed 5G LDPC coded shaping modulation scheme can achieve a shaping gain of about 0.6 dB and a puncturing gain of about 0.5 dB(compared with the non-puncturing design).
作者
杨佳仪
王千帆
姚忻圆梦
李聪端
马啸
YANG Jia-yi;WANG Qian-fan;YAO Xin-yuan-meng;LI Cong-duan;MA Xiao(School of Electronics and Communication Engineering,Sun Yat-sen University,Shenzhen,Guangdong 518000,China;School of Computer Science and Engineering,Sun Yat-Sen University,Guangzhou,Guangdong 510006,China;Guangdong Province Key Laboratory of Information Security Technology,Guangzhou,Guangdong 510006,China)
出处
《电子学报》
EI
CAS
CSCD
北大核心
2024年第9期2979-2987,共9页
Acta Electronica Sinica
基金
国家重点研发计划(No.2020YFB1807100)
国家自然科学基金(No.61971454,No.62271514)
深圳市科技创新委员会参与项目(No.JCYJ20210324120002007,No.JCYJ20190807155617099,No.ZDSYS20210623091807023)。
