面向OTFS的时延-多普勒域信道估计方法综述

doi:10.11959/j.issn.1000-436x.2022224

通信学报 ›› 2022, Vol. 43 ›› Issue (12): 188-201.doi: 10.11959/j.issn.1000-436x.2022224

面向OTFS的时延-多普勒域信道估计方法综述

邢旺¹^,², 唐晓刚³, 周一青¹^,², 张冲¹^,², 潘振岗⁴

¹ 中国科学院计算技术研究所处理器芯片全国重点实验室，北京 100190
² 中国科学院大学计算机科学与技术学院，北京 100049
³ 航天工程大学航天信息学院，北京 101400
⁴ 北京紫光展锐通信技术有限公司，北京 100088

修回日期:2022-10-10 出版日期:2022-12-25 发布日期:2022-12-01
作者简介:邢旺（1996- ），男，河北廊坊人，中国科学院计算技术研究所博士生，主要研究方向为通信与计算融合、存储通信、正交时频空间调制技术等
唐晓刚（1977- ），男，吉林桦甸人，博士，航天工程大学副教授，主要研究方向为空间信号智能处理、电磁频谱管控、人工智能航天应用
周一青（1975- ），女，浙江杭州人，博士，中国科学院计算技术研究所研究员，主要研究方向为通信与计算融合、移动边缘计算、存储通信、干扰管控等
张冲（1995- ），男，安徽池州人，中国科学院计算技术研究所博士生，主要研究方向为无线通信、信号处理、编码调制等
潘振岗（1975- ），男，江苏南通人，博士，北京紫光展锐通信技术有限公司高级工程师，主要研究方向为无线信号处理、多天线系统、信道编解码、跨层优化等
基金资助:
国家重点研发计划基金资助项目(2021YFA1000500)

Survey of channel estimation method in delay-Doppler domain for OTFS

Wang XING¹^,², Xiaogang TANG³, Yiqing ZHOU¹^,², Chong ZHANG¹^,², Zhengang PAN⁴

¹ State Key Lab of Processors, Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190, China
² School of Computer Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
³ School of Space Information, Space Engineering University, Beijing 101400, China
⁴ Beijing Unisoc Technologies Co., Ltd., Beijing 100088, China

Revised:2022-10-10 Online:2022-12-25 Published:2022-12-01
Supported by:
The National Key Research and Development Program of China(2021YFA1000500)

摘要/Abstract

摘要：

为了在高移动性场景中提供稳定可靠的通信服务，6G 系统可考虑基于时延–多普勒（DD）域的正交时频空间（OTFS）作为其调制方案。OTFS通过将发送符号映射到DD域，再将其二维变换到时间–频率（TF）域，使所有发送符号具备获取时频全分集的潜力，有效提高了双选择性信道下的通信性能。由于DD域等效信道具有很多良好性质，现有OTFS信道估计方法大多在DD域完成。考虑实现思路的差异和算法应用场景的区别，已有面向OTFS的DD域信道估计方法被划分为3类并进行综述。最后总结分析了当前DD域信道估计方法的挑战及潜在解决思路。

关键词: 正交时频空间, 正交频分复用, 时延–多普勒域, 信道估计

Abstract:

In order to provide reliable communication service for high-mobility scenarios, 6G can consider DD (delay-Doppler) domain based OTFS (orthogonal time frequency space) as its modulation scheme.By mapping the transmitted symbols onto DD domain and transforming them into TF (time-frequency) domain, OTFS endows all the transmitted symbols with the potential of capturing time-frequency full diversity, effectively improving the performance of communication in time-varying fading channels.Due to the superior properties of DD effective channel, the existing OTFS channel estimation methods were mostly carried out in DD domain.Considering the difference of implementation and application scenarios, existing DD channel estimation methods for OTFS were divided into three categories and overviewed, after which the challenges and potential solutions for current DD channel estimation methods were summarized and analyzed.

Key words: orthogonal time frequency space, orthogonal frequency division multiplexing, delay-Doppler domain, channel estimation

中图分类号:

TN92

邢旺, 唐晓刚, 周一青, 张冲, 潘振岗. 面向OTFS的时延-多普勒域信道估计方法综述[J]. 通信学报, 2022, 43(12): 188-201.

Wang XING, Xiaogang TANG, Yiqing ZHOU, Chong ZHANG, Zhengang PAN. Survey of channel estimation method in delay-Doppler domain for OTFS[J]. Journal on Communications, 2022, 43(12): 188-201.

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面向OTFS的时延-多普勒域信道估计方法综述

Survey of channel estimation method in delay-Doppler domain for OTFS

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