一种DVB-S2X标准16APSK软解调优化算法  

A soft demodulation optimization algorithm of 16APSK signal for DVB-S2X standard

作　　者：张厦 姜泉江 梁广 余金培 ZHANG Sha;JIANG Quanjiang;LIANG Guang;YU Jinpei(Innovation Academy for Microsatellites, Chinese Academy of Sciences,Shanghai 201203, China;University of Chinese Academy of Sciences,Beijing 100049, China)

机构地区：[1]中国科学院微小卫星创新研究院,上海201203 [2]中国科学院大学,北京100049

出　　处：《中国科学院大学学报（中英文）》2021年第5期660-665,共6页Journal of University of Chinese Academy of Sciences

基　　金：国家自然科学基金(61601295);上海市启明星计划(18QA1404000);国家重点研发计划(2017YFB0502902)资助。

摘　　要：DVB-S2X标准在DVB-S2标准的基础上增加多种高阶APSK(amplitude phase shift keying)调制方式,其中16APSK调制增加8+8APSK星座图。主要分析16APSK星座图的特点,并提出一种新的软解调优化算法。该算法与LLR算法和Max-log-MAP算法相比,计算复杂度显著降低。仿真结果表明,优化算法性能损失小,在工程应用中具有较好的实用性。Multiple high-order APSK modulation schemes are added in the DVB-S2X standard on the basis of the DVB-S2 standard,and an 8+8APSK constellation is added based on the original 16APSK.In this paper,characteristics of a 16-APSK constellation are mainly analyzed,and a new soft demodulation optimization algorithm is proposed.Compared with the LLR algorithm and the Max-log-MAP algorithm,the proposed algorithm has the significantly reduced computational complexity.Simulation results of the three algorithms show that the optimization algorithm is small in performance loss and has good practicability in engineering application.

关 键 词：DVB-S2X 8+8APSK LDPC 软解调 

分 类 号：TN927.23[电子电信—通信与信息系统]