Pilot-Aided Joint Time Synchronization and Channel Estimation for OTFS

Jiazheng Sun; Peng Yang; Xianbin Cao; Zehui Xiong; Haijun Zhang; Yue Gao; Tony Q.S. Quek

doi:10.1109/LWC.2024.3490839

Pilot-Aided Joint Time Synchronization and Channel Estimation for OTFS

Jiazheng Sun
, Peng Yang^*
, Xianbin Cao^*
, Zehui Xiong
, Haijun Zhang
, Yue Gao
, Tony Q.S. Quek

^*Corresponding author for this work

School of Electronic and Information Engineering

Beihang University
Ministry of Industry and Information Technology
Singapore University of Technology and Design
University of Science and Technology Beijing
Fudan University

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

This letter proposes a pilot-aided joint time synchronization and channel estimation (JTSCE) algorithm for orthogonal time frequency space (OTFS) systems. Unlike existing algorithms, JTSCE employs a maximum length sequence (MLS) rather than an isolated signal as the pilot. Distinctively, JTSCE explores MLS's autocorrelation properties to estimate timing offset and channel delay taps. After obtaining delay taps, closed-form expressions of Doppler and channel gain for each propagation path are derived. Simulation results indicate that, compared to its counterpart, JTSCE achieves better bit error rate performance, close to that with perfect time synchronization and channel state information.

Original language	English
Pages (from-to)	143-147
Number of pages	5
Journal	IEEE Wireless Communications Letters
Volume	14
Issue number	1
DOIs	https://doi.org/10.1109/LWC.2024.3490839
State	Published - 2025

Keywords

OTFS
channel estimation
time synchronization
timing offset estimation

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10.1109/LWC.2024.3490839

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@article{9801a6a4785f4af1b313a36448081711,

title = "Pilot-Aided Joint Time Synchronization and Channel Estimation for OTFS",

abstract = "This letter proposes a pilot-aided joint time synchronization and channel estimation (JTSCE) algorithm for orthogonal time frequency space (OTFS) systems. Unlike existing algorithms, JTSCE employs a maximum length sequence (MLS) rather than an isolated signal as the pilot. Distinctively, JTSCE explores MLS's autocorrelation properties to estimate timing offset and channel delay taps. After obtaining delay taps, closed-form expressions of Doppler and channel gain for each propagation path are derived. Simulation results indicate that, compared to its counterpart, JTSCE achieves better bit error rate performance, close to that with perfect time synchronization and channel state information.",

keywords = "OTFS, channel estimation, time synchronization, timing offset estimation",

author = "Jiazheng Sun and Peng Yang and Xianbin Cao and Zehui Xiong and Haijun Zhang and Yue Gao and Quek, \{Tony Q.S.\}",

note = "Publisher Copyright: {\textcopyright} 2024 IEEE.",

year = "2025",

doi = "10.1109/LWC.2024.3490839",

language = "英语",

volume = "14",

pages = "143--147",

journal = "IEEE Wireless Communications Letters",

issn = "2162-2337",

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TY - JOUR

T1 - Pilot-Aided Joint Time Synchronization and Channel Estimation for OTFS

AU - Sun, Jiazheng

AU - Yang, Peng

AU - Cao, Xianbin

AU - Xiong, Zehui

AU - Zhang, Haijun

AU - Gao, Yue

AU - Quek, Tony Q.S.

PY - 2025

Y1 - 2025

N2 - This letter proposes a pilot-aided joint time synchronization and channel estimation (JTSCE) algorithm for orthogonal time frequency space (OTFS) systems. Unlike existing algorithms, JTSCE employs a maximum length sequence (MLS) rather than an isolated signal as the pilot. Distinctively, JTSCE explores MLS's autocorrelation properties to estimate timing offset and channel delay taps. After obtaining delay taps, closed-form expressions of Doppler and channel gain for each propagation path are derived. Simulation results indicate that, compared to its counterpart, JTSCE achieves better bit error rate performance, close to that with perfect time synchronization and channel state information.

AB - This letter proposes a pilot-aided joint time synchronization and channel estimation (JTSCE) algorithm for orthogonal time frequency space (OTFS) systems. Unlike existing algorithms, JTSCE employs a maximum length sequence (MLS) rather than an isolated signal as the pilot. Distinctively, JTSCE explores MLS's autocorrelation properties to estimate timing offset and channel delay taps. After obtaining delay taps, closed-form expressions of Doppler and channel gain for each propagation path are derived. Simulation results indicate that, compared to its counterpart, JTSCE achieves better bit error rate performance, close to that with perfect time synchronization and channel state information.

KW - OTFS

KW - channel estimation

KW - time synchronization

KW - timing offset estimation

UR - https://www.scopus.com/pages/publications/85208661316

U2 - 10.1109/LWC.2024.3490839

DO - 10.1109/LWC.2024.3490839

M3 - 文章

AN - SCOPUS:85208661316

SN - 2162-2337

VL - 14

SP - 143

EP - 147

JO - IEEE Wireless Communications Letters

JF - IEEE Wireless Communications Letters

IS - 1

ER -

Pilot-Aided Joint Time Synchronization and Channel Estimation for OTFS

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Keywords

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