正交时频空:适用于高多普勒扩展场景的调制技术  

OTFS:A modulation technique for high Doppler spread scenarios

作　　者：徐湛 李青宇 巩译 孟繁轲 张校旗 XU Zhan;LI Qingyu;GONG Yi;MENG Fanke;ZHANG Xiaoqi(Key Laboratory of Modern Measurement and Control Technology,Beijing Information Science and Technology University,Beijing 100192,China;Beijing Hoopox Information and Technology Co.,Ltd,Beijing 100026,China;EM Information Lab of Electrical and Electronic Engineering Department,Southern University of Science and Technology,Shenzhen 518000,China)

机构地区：[1]北京信息科技大学现代测控技术教育部重点实验室,北京100192 [2]北京好扑信息科技有限公司,北京100026 [3]南方科技大学电子与电气工程系EM信息实验室,广东深圳518000

出　　处：《西安邮电大学学报》2021年第5期1-14,共14页Journal of Xi’an University of Posts and Telecommunications

基　　金：国家重点研发项目(2020YFC1511701);北京市优秀人才资助计划青年拔尖项目(2016000026833ZK08);北京信息科技大学重点科研培育项目(2121YJPY224);北京信息科技大学校基金(2021XJJ24)。

摘　　要：为了充分提升高多普勒扩展场景下的通信系统频谱效率,全面综述了正交时频空(Orthogonal Time Frequency Space,OTFS)领域的研究成果,对时间选择性信道和OTFS的基本原理进行了介绍。OTFS调制技术能够在高多普勒扩展情况下提供比传统的正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)更显著的性能增益。按照信道估计或信号检测等重点技术进行分类,对已有研究成果进行了回顾、总结和比较,并探讨了OTFS技术的峰均比、分数多普勒和基带脉冲等几个重要的开放性问题。In order to fully improve the spectral efficiency of communication system in high Doppler spread scenarios,the research results in the field of Orthogonal Time Frequency Space(OTFS)are comprehensively summarized,and the basic principles of time-selective channels and OTFS are introduced.OTFS can provide significant performance gains compared with the traditional Orthogonal Frequency Division Multiplexing(OFDM)in the case of high Doppler extension.Key techniques are classified according to channel estimation or signal detection,and previous work is summarized,reviewed and compared.In addition,several open important problems such as peak-to-average power ratio,fractional Doppler and baseband pulse of OTFS are discussed.

关 键 词：正交时频空 正交频分复用 多普勒扩展 信道估计 信号检测 

分 类 号：TN929.5[电子电信—通信与信息系统]