| 摘要: |
| 正交时频空（Orthogonal Time Frequency Space，OTFS）调制技术是近年提出的新型信号调制方式，旨在应对下一代无线通信网络典型的高移动性多径传输场景中存在的大多普勒频移导致的通信质量下降问题。OTFS技术将符号映射至时延-多普勒（Delay-Doppler，DD）域，并通过二维变换将其变换到时频域，以应对大多普勒频移和时延导致的载波间干扰与符号间干扰。分析并总结了OTFS技术的基本原理、信道估计、符号检测及与多址技术结合等方向的研究现状，对未来OTFS技术的发展趋势进行了展望。 |
| 关键词: 第六代移动通信技术 正交时频空（OTFS） 信道估计 符号检测 多址接入 |
| DOI：10.20079/j.issn.1001-893x.240311002 |
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| 基金项目:复杂电子系统仿真重点实验室基金（614201003032208） |
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| OTFS Technology:Research Status and Development Trends |
| GAO Mingqi,DAI Jianmei,ZHU Shibing,LI Changqing |
| (Space Engineering University,Beijing 101416,China) |
| Abstract: |
| Orthogonal time frequency space(OTFS) modulation technology is a new signal modulation method proposed in recent years,which aims to deal with the problem of communication quality degradation caused by great frequency shifts in the typical high-mobility multipath transmission scenarios of next-generation wireless communication networks.OTFS technology maps the symbols to the delay-Doppler(DD) domain,and transforms them to the time-frequency domain through two-dimensional transformation to cope with the inter-carrier interference and inter-symbol interference caused by the majority of the great frequency shift and delay.The authors analyze and summarize the basic principles of OTFS technology,channel estimation,symbol detection and its combination with multiple access technology,and look forward to the future development trend of OTFS technology. |
| Key words: 6G orthogonal time frequency space(OTFS) channel estimation symbol detection multiple access |
