Delay-doppler and angular domain 4D-sparse CSI estimation in OTFS aided MIMO systems
Delay-doppler and angular domain 4D-sparse CSI estimation in OTFS aided MIMO systems
A convenient delay, Doppler and angular-(DDA) domain representation of the multiple-input multiple-output (MIMO) wireless channel is conceived for deriving the end to end relationship in the delay-Doppler (DD)-domain for orthogonal time frequency space (OTFS)-based communications. Subsequently, a time-domain pilot based model is developed for estimating the DDA-domain channel state information (CSI) of our MIMO OTFS system. The key differentiating feature of the CSI estimation model derived is its ability to exploit the 4-dimensional (4D)-sparsity arising in the DDA-domain, given the limited number of dominant scatterers. Furthermore, the training overhead of the proposed framework is low, and the pilot placement is quite flexible, necessitating no guard-interval. Finally, an orthogonal matching pursuit (OMP) framework is employed for 4D-sparse CSI acquisition, followed by deriving the Oracle minimum mean squared error (Oracle-MMSE) and its Bayesian Cramer-Rao lower bound (BCRLB). Our simulation results confirm the improved CSI estimation performance attained over the benchmarks.
Angular sparsity, BCRLB, Channel estimation, Delays, Doppler effect, Estimation, MIMO communication, OTFS, Symbols, Wireless communication, channel estimation, delay-Doppler, high-mobility
13447-13452
Srivastava, Suraj
7b40cb6c-7bc6-402c-8751-24346d39002c
Kumar Singh, Rahul
5bf0c2f9-c5c0-426f-b9dc-8ee278f0afe8
Jagannatham, Aditya K.
ae9274e6-c98c-4e15-a5be-f4eb0fc179ff
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
1 December 2022
Srivastava, Suraj
7b40cb6c-7bc6-402c-8751-24346d39002c
Kumar Singh, Rahul
5bf0c2f9-c5c0-426f-b9dc-8ee278f0afe8
Jagannatham, Aditya K.
ae9274e6-c98c-4e15-a5be-f4eb0fc179ff
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Srivastava, Suraj, Kumar Singh, Rahul, Jagannatham, Aditya K. and Hanzo, Lajos
(2022)
Delay-doppler and angular domain 4D-sparse CSI estimation in OTFS aided MIMO systems.
IEEE Transactions on Vehicular Technology, 71 (12), .
(doi:10.1109/TVT.2022.3206489).
Abstract
A convenient delay, Doppler and angular-(DDA) domain representation of the multiple-input multiple-output (MIMO) wireless channel is conceived for deriving the end to end relationship in the delay-Doppler (DD)-domain for orthogonal time frequency space (OTFS)-based communications. Subsequently, a time-domain pilot based model is developed for estimating the DDA-domain channel state information (CSI) of our MIMO OTFS system. The key differentiating feature of the CSI estimation model derived is its ability to exploit the 4-dimensional (4D)-sparsity arising in the DDA-domain, given the limited number of dominant scatterers. Furthermore, the training overhead of the proposed framework is low, and the pilot placement is quite flexible, necessitating no guard-interval. Finally, an orthogonal matching pursuit (OMP) framework is employed for 4D-sparse CSI acquisition, followed by deriving the Oracle minimum mean squared error (Oracle-MMSE) and its Bayesian Cramer-Rao lower bound (BCRLB). Our simulation results confirm the improved CSI estimation performance attained over the benchmarks.
Text
Delay-Doppler and Angular Domain 4D-Sparse CSI Estimation in OTFS Aided MIMO Systems
- Accepted Manuscript
More information
Accepted/In Press date: 9 September 2022
e-pub ahead of print date: 14 September 2022
Published date: 1 December 2022
Additional Information:
Publisher Copyright:
© 1967-2012 IEEE.
Keywords:
Angular sparsity, BCRLB, Channel estimation, Delays, Doppler effect, Estimation, MIMO communication, OTFS, Symbols, Wireless communication, channel estimation, delay-Doppler, high-mobility
Identifiers
Local EPrints ID: 470492
URI: http://eprints.soton.ac.uk/id/eprint/470492
ISSN: 0018-9545
PURE UUID: df0fff10-922d-4f35-a5d2-8d470275211b
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Date deposited: 11 Oct 2022 16:58
Last modified: 18 Mar 2024 02:36
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Contributors
Author:
Suraj Srivastava
Author:
Rahul Kumar Singh
Author:
Aditya K. Jagannatham
Author:
Lajos Hanzo
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