面向大规模机器类通信的无速率编码调制技术  

Rateless Coded Modulation Technology for Massive Machine-Type Communication

作　　者：王莹莹[1] 孙蓉[1] 程建华 苏丽[1] 夏晓靖 WANG Yingying;SUN Rong;CHENG Jianhua;SU Li;XIA Xiaojing(College of Intelligent Systems Science and Engineering,Harbin Engineering University,Harbin 150001,China;Shanghai Electro-Mechanical Engineering Institute,Shanghai 201109,China)

机构地区：[1]哈尔滨工程大学智能科学与工程学院,哈尔滨150001 [2]上海机电工程研究所,上海201109

出　　处：《实验室研究与探索》2022年第6期21-25,47,共6页Research and Exploration In Laboratory

基　　金：教育部新工科研究与实践项目(E-AQGABQ202002711);教育部产学合作协同育人项目(202002005012);黑龙江省教育科学规划课题(GBE1317040)。

摘　　要：面向大规模机器类通信的高可靠、低时延要求,以及时变信道的特性,提出高可靠低时延的联合编码调制技术。基于幅度相移键控(Amplitude Phase Shift Keying,APSK)调制技术,提出一种APSK星座放置优化方案(Place-APSK,P-APSK)。该方案的基本原理是平均欧氏距离与比特发生错误数量成正比,通过使最小欧氏距离的平均值最大来提高系统性能。通过对不同码率、APSK的星座图的误块率分析,证明优化后的星座图比未优化的星座图误块率降低了1 dB。为了减小P-APSK的计算复杂度与时间复杂度,将禁忌搜索算法与P-PASK结合,提出一种低复杂度的P-APSK。通过对复杂度的分析,证明了该方法的有效性。Aiming at the high reliability and low latency requirements of large-scale machine-type communication,as well as the characteristics of time-varying channels,this paper proposes a high-reliability and low-latency joint coding modulation technique.Based on amplitude phase shift keying(APSK)modulation technology,this paper proposes an placed-amplitude phase shift keying(P-APSK)constellation placement optimization scheme.The basic principle of this scheme is that the average Euclidean distance is proportional to the number of bit errors,and the system performance is improved by maximizing the average value of the minimum Euclidean distance.By analyzing the block error rate of constellation diagrams with different code rates and different APSK,it is proved that the optimized constellation diagram reduces the block error rate by 1 dB compared with the unoptimized constellation diagram.At the same time,in order to reduce the computational complexity and time complexity of the amplitude phase shift keying constellation placement optimization scheme,this paper combines the tabu search algorithm with the amplitude phase shift keying constellation placement optimization scheme to propose a low complexity amplitude phase shift keying constellation placement optimization scheme.Through the analysis of the complexity,the effectiveness of the method is proved.

关 键 词：大规模机器类型通信 复杂度 幅度相移键控 误块率 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]