链路自适应下的自动空间调制方式识别  

Automatic Spatial Modulation Recognition in Link Adaptive System

作　　者：毛琼 吴越[1] 谷源涛[1] MAO Qiong;WU Yue;GU Yuan-tao(Department of Electronic Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《计算机仿真》2020年第9期136-139,161,共5页Computer Simulation

摘　　要：空间调制作为一种新型调制方式,已经成为下一代移动通信的研究热点。链路自适应技术和空间调制相结合可以进一步提高系统效率。针对广义空间调制下的自动调制方式识别问题,提出了基于似然检验的方法。通过对收发信号进行概率建模,首先导出关于调制方式的似然函数,然后通过最大化似然函数对调制方式进行识别。为了满足自适应广义空间调制系统低时延的要求,又提出了基于能量排序的似然检验方法,同时给出了两个算法的复杂度分析。实验结果证明了所提算法的有效性。As a new type of modulation,spatial modulation has become a research hotspot in the next generation mobile communication.The combination of link adaptive technology and spatial modulation can further improve the system efficiency.In this paper,a method based on likelihood test is proposed for automatic modulation recognition of generalized spatial modulation.By characterizing the distribution of receiving and transmitting signals,we first derived the likelihood function with respect to the modulation mode,then the modulation mode was recognized by maximizing the likelihood.In order to meet the requirement of adaptive generalized space modulation system for low delay,we al⁃so proposed an energy ranking based likelihood test method and gave the complexity analysis of the two algorithms.The experimental results show the effectiveness of the proposed algorithm.

关 键 词：空间调制 自动调制方式识别 似然检验 

分 类 号：N945.12[自然科学总论—系统科学] TP391.9[自动化与计算机技术—计算机应用技术]