A Novel Channel Estimation Scheme for OTFS

Hang Zhao, Ziqi Kang, Hua Wang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

15 Citations (Scopus)

Abstract

Orthogonal time frequency space (OTFS) modulation is an emerging multicarrier technique designed in the delay-Doppler domain. It converts a time-varying channel into a 2D invariant channel in the delay-Doppler domain through 2D transformations, resulting in better performance gain over orthogonal frequency division multiplexing (OFDM) in high-mobility scenarios. In this paper, we first derive the feasibility of threshold aided channel estimation for OTFS systems. Considering the poor performance of classical threshold aided scheme with a single impulse under a high noisy condition, we further propose a novel channel estimation scheme based on priori channel information, i.e., maximum Doppler shift and maximum multipath delay, with multiple impulses to extract the diversity gain so as to improve the performance. In addition, the specific method for threshold selection is given on the basis of Statistical Signal Processing. The simulation results indicate that the proposed scheme can achieve better channel state information over the classical scheme.

Original languageEnglish
Title of host publication2020 IEEE 20th International Conference on Communication Technology, ICCT 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages12-16
Number of pages5
ISBN (Electronic)9781728181417
DOIs
Publication statusPublished - 28 Oct 2020
Event20th IEEE International Conference on Communication Technology, ICCT 2020 - Nanning, China
Duration: 28 Oct 202031 Oct 2020

Publication series

NameInternational Conference on Communication Technology Proceedings, ICCT
Volume2020-October

Conference

Conference20th IEEE International Conference on Communication Technology, ICCT 2020
Country/TerritoryChina
CityNanning
Period28/10/2031/10/20

Keywords

  • OTFS
  • diversity gain
  • multiple impulses
  • priori channel information
  • threshold aided channel estimation

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