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

Wang XING; Xiaogang TANG; Yiqing ZHOU; Chong ZHANG; Zhengang PAN

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

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

Comprehensive Reviews | 更新时间：2024-06-05

- Survey of channel estimation method in delay-Doppler domain for OTFS
- Journal on Communications Vol. 43, Issue 12, Pages: 188-201(2022)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
  
  The National Key Research and Development Program of China(2021YFA1000500)
- DOI：10.11959/j.issn.1000-436x.2022224
  CLC： TN92
- Online First：2022-12，
  
  Published：25 December 2022
- 稿件说明：
移动端阅览
Wang XING, Xiaogang TANG, Yiqing ZHOU, et al. Survey of channel estimation method in delay-Doppler domain for OTFS[J]. Journal on Communications, 2022, 43(12): 188-201.
DOI：

Wang XING, Xiaogang TANG, Yiqing ZHOU, et al. Survey of channel estimation method in delay-Doppler domain for OTFS[J]. Journal on Communications, 2022, 43(12): 188-201. DOI： 10.11959/j.issn.1000-436x.2022224.

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。

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.

关键词

Keywords

references

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