西安电子科技大学学报（自然科学版）2018，Vol.45Issue(1)：17-22,6.DOI:10.3969/j.issn.1001-2400.2018.01.004
非合作通信中MQAM的定时载波联合同步
Joint carrier synchronization and symbol timing for MQAM in non-cooperation communication systems
摘要
Abstract
Aiming at the problem of symbol timing and carrier synchronization of (M-ary Quadrature Amplitude Modulation) MQAM signals with large symbol rate deviation in non-cooperative communication systems under multipath channels,a new method based on the improved Gardner algorithm for MQAM signal timing carrier joint synchronization is proposed.First,the method obtains timing offset estimation and carrier offset coarse estimation using the relationship between frequency offset and output value of the Gardner algorithm.Then,locking is performed with the difference of the absolute value between estimation and the output value of timing error detection which is half a symbol different from the estimation.Finally, the method uses the phase-locked loop to track the fine frequency offset and phase offset.Simulation result shows that the proposed joint estimation method of timing offset and carrier offset has a good estimation performance under the condition of multipath channels.关键词
同步/符号定时/频率偏移/联合估计/非合作通信Key words
synchronization/symbol timing/carrier frequency offset/joint estimation/non-cooperation communication分类
信息技术与安全科学引用本文复制引用
刘明骞,陈钱,吴芸,李兵兵..非合作通信中MQAM的定时载波联合同步[J].西安电子科技大学学报（自然科学版）,2018,45(1):17-22,6.基金项目
国家自然科学基金资助项目(61501348,61271299) （61501348,61271299）
陕西省自然科学基础研究计划资助项目(2016JQ6039) （2016JQ6039）
国家博士后科学基金资助项目(2017M611912) （2017M611912）
高等学校学科创新引智计划资助项目(B08038) （B08038）
江苏省博士后科研资助计划资助项目(1701059B) （1701059B）
