A Novel Delay-Doppler-Based Channel Estimation Method in Doubly-Dispersive OCDM Systems

Orthogonal chirp division multiplexing (OCDM) has recently emerged as a new candidate for the 6G waveform. In high-mobility wireless channels, the inseparability of the data symbols in both time and frequency domains makes channel estimation in OCDM-based wireless communication quite challenging. In...

Full description

Saved in:
Bibliographic Details
Published inIEEE wireless communications letters Vol. 13; no. 3; pp. 801 - 804
Main Authors Zegrar, Salah Eddine, Arslan, Huseyin
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.03.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Channel estimation
Chirp
Code division multiplexing
Complexity
Delay
delay-Doppler domain
Doppler effect
doubly-dispersive channel
Estimation
Frenel domain
Multiplexing
OCDM
Performance evaluation
Representations
Symbols
Waveforms
Wireless communication
Wireless communications
Online AccessGet full text

Cover

More Information
Summary:Orthogonal chirp division multiplexing (OCDM) has recently emerged as a new candidate for the 6G waveform. In high-mobility wireless channels, the inseparability of the data symbols in both time and frequency domains makes channel estimation in OCDM-based wireless communication quite challenging. In this letter, we address this issue by investigating the representation of the OCDM waveform in the delay-Doppler domain in which we reveal that OCDM carriers exhibit a sparse representation. Building upon this observation, we propose a low-complexity channel estimation technique for OCDM systems. This technique involves designing pilots in the Fresnel domain and estimating the channel in the delay-Doppler domain. We evaluate the performance of the proposed channel estimation and demonstrate the superior performance of our approach, showcasing both high accuracy and low computational complexity.
ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2023.3344231