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

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

8 Citations (Scopus)

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
Early online date	04 Nov 2024
DOIs	https://doi.org/10.1109/LWC.2024.3490839
Publication status	Published - Jan 2025
Externally published	Yes

Keywords

channel estimation
OTFS
time synchronization
timing offset estimation

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering

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10.1109/LWC.2024.3490839Licence: Unspecified

Cite this

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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 = "channel estimation, OTFS, 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.\}",

year = "2025",

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doi = "10.1109/LWC.2024.3490839",

language = "English",

volume = "14",

pages = "143--147",

journal = "IEEE Wireless Communications Letters",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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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 - 2025/1

Y1 - 2025/1

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 - channel estimation

KW - OTFS

KW - time synchronization

KW - timing offset estimation

U2 - 10.1109/LWC.2024.3490839

DO - 10.1109/LWC.2024.3490839

M3 - Article

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

Abstract

Keywords

ASJC Scopus subject areas

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