Li, Xiangjun and Fan, Pingzhi and Wang, Qianli and Liu, Zilong (2024) Grid Evolution for Doubly Fractional Channel Estimation in OTFS Systems. IEEE Transactions on Vehicular Technology. pp. 1-5. DOI https://doi.org/10.1109/tvt.2024.3472695 (In Press)
Li, Xiangjun and Fan, Pingzhi and Wang, Qianli and Liu, Zilong (2024) Grid Evolution for Doubly Fractional Channel Estimation in OTFS Systems. IEEE Transactions on Vehicular Technology. pp. 1-5. DOI https://doi.org/10.1109/tvt.2024.3472695 (In Press)
Li, Xiangjun and Fan, Pingzhi and Wang, Qianli and Liu, Zilong (2024) Grid Evolution for Doubly Fractional Channel Estimation in OTFS Systems. IEEE Transactions on Vehicular Technology. pp. 1-5. DOI https://doi.org/10.1109/tvt.2024.3472695 (In Press)
Abstract
In orthogonal time-frequency space communications, the performances of existing on-grid and off-grid channel estimation (CE) schemes are determined by the delay-Doppler (DD) grid density. In practice, multiple real-life DD channel responses might be co-located within a same DD grid interval, leading to performance degradation. A finer grid interval is needed to distinguish these responses, but this could result in a significantly higher CE complexity when traditional methods are used. To address this issue, a grid evolution method for doubly fractional CE is proposed by evolving the initially uniform coarse DD grid into a non-uniform dense grid. Simulation results show that our proposed method leads to improved computational efficiency, and achieves a good trade-off between CE performance and complexity.
Item Type: | Article |
---|---|
Uncontrolled Keywords: | OTFS, grid evolution, channel estimation, sparse Bayesian learning, fractional delay-Doppler |
Divisions: | Faculty of Science and Health Faculty of Science and Health > Computer Science and Electronic Engineering, School of |
SWORD Depositor: | Unnamed user with email elements@essex.ac.uk |
Depositing User: | Unnamed user with email elements@essex.ac.uk |
Date Deposited: | 03 Oct 2024 10:26 |
Last Modified: | 23 Oct 2024 06:04 |
URI: | http://repository.essex.ac.uk/id/eprint/39311 |
Available files
Filename: Grid Evolution Method in doubly fractional Channel Estimation for OTFS Systems_ackchange.pdf
Licence: Creative Commons: Attribution 4.0