Delay-Doppler-domain channel estimation and reduced-complexity detection of faster-than-Nyquist signaling aided OTFS
Delay-Doppler-domain channel estimation and reduced-complexity detection of faster-than-Nyquist signaling aided OTFS
We conceive a novel channel estimation and data detection scheme for OTFS-modulated faster-than-Nyquist (FTN) transmission over doubly selective fading channels, aiming for enhancing the spectral efficiency and Doppler resilience. The delay-Doppler (DD) domain’s input-output relationship of OTFS-FTN signaling is derived by employing a root-raised cosine (RRC) shaping filter. More specifically, we design our DD-domain channel estimator for FTN-based pilot transmission, where the pilot symbol interval is lower than that defined by the classic Nyquist criterion. Moreover, we propose a reducedcomplexity linear minimum mean square error equalizer, supporting noise whitening, where the FTNinduced inter-symbol interference (ISI) matrix is approximated by a sparse one. Our performance results
demonstrate that the proposed OTFS-FTN scheme is capable of enhancing the achievable information rate, while attaining a comparable BER performance to both that of its Nyquist-based OTFS counterpart and to other FTN transmission schemes, which employ the same RRC shaping filter.
Hong, Zekun
3dc329f2-d181-4077-99bd-8a93efe337dd
Sugiura, Shinya
0f1b2d3e-e804-4bc9-8507-1a057c460239
Xu, Chao
5710a067-6320-4f5a-8689-7881f6c46252
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Hong, Zekun
3dc329f2-d181-4077-99bd-8a93efe337dd
Sugiura, Shinya
0f1b2d3e-e804-4bc9-8507-1a057c460239
Xu, Chao
5710a067-6320-4f5a-8689-7881f6c46252
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Hong, Zekun, Sugiura, Shinya, Xu, Chao and Hanzo, Lajos
(2026)
Delay-Doppler-domain channel estimation and reduced-complexity detection of faster-than-Nyquist signaling aided OTFS.
IEEE Open Journal of Vehicular Technology.
(In Press)
Abstract
We conceive a novel channel estimation and data detection scheme for OTFS-modulated faster-than-Nyquist (FTN) transmission over doubly selective fading channels, aiming for enhancing the spectral efficiency and Doppler resilience. The delay-Doppler (DD) domain’s input-output relationship of OTFS-FTN signaling is derived by employing a root-raised cosine (RRC) shaping filter. More specifically, we design our DD-domain channel estimator for FTN-based pilot transmission, where the pilot symbol interval is lower than that defined by the classic Nyquist criterion. Moreover, we propose a reducedcomplexity linear minimum mean square error equalizer, supporting noise whitening, where the FTNinduced inter-symbol interference (ISI) matrix is approximated by a sparse one. Our performance results
demonstrate that the proposed OTFS-FTN scheme is capable of enhancing the achievable information rate, while attaining a comparable BER performance to both that of its Nyquist-based OTFS counterpart and to other FTN transmission schemes, which employ the same RRC shaping filter.
More information
Accepted/In Press date: 15 January 2026
Identifiers
Local EPrints ID: 509503
URI: http://eprints.soton.ac.uk/id/eprint/509503
ISSN: 2644-1330
PURE UUID: 04f5a310-2660-4f1c-8239-137968a131cf
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Date deposited: 24 Feb 2026 17:50
Last modified: 07 Mar 2026 03:15
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Contributors
Author:
Zekun Hong
Author:
Shinya Sugiura
Author:
Chao Xu
Author:
Lajos Hanzo
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