Precoded faster-than-Nyquist signaling using optimal power allocation for OTFS
Precoded faster-than-Nyquist signaling using optimal power allocation for OTFS
A precoded orthogonal time frequency space (OTFS) modulation scheme relying on faster-than-Nyquist (FTN) transmission over doubly selective fading channels is proposed, which enhances the spectral efficiency and improves the Doppler resilience. We derive the input-output relationship of the FTN signaling in the delay-Doppler domain. Eigenvalue decomposition (EVD) is used for eliminating both the effects of inter-symbol interference and correlated additive noise encountered in the delay-Doppler domain to enable efficient symbol-by-symbol demodulation. Furthermore, the power allocation coefficients of individual frames are optimized for maximizing the mutual information under the constraint of the derived total transmit power. Our performance results demonstrate that the proposed FTN-based OTFS scheme can enhance the information rate while achieving a comparable BER performance to that of its conventional Nyquist-based OTFS counterpart that employs the same root-raised-cosine shaping filter.
faster-than-Nyquist signaling, OTFS, mutual information, precoding, doubly selective fading, information rate
Hong, Zekun
3dc329f2-d181-4077-99bd-8a93efe337dd
Sugiura, Shinya
4c8665dd-1ad8-4dc0-9298-bf04eded3579
Xu, Chao
5710a067-6320-4f5a-8689-7881f6c46252
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
5 November 2024
Hong, Zekun
3dc329f2-d181-4077-99bd-8a93efe337dd
Sugiura, Shinya
4c8665dd-1ad8-4dc0-9298-bf04eded3579
Xu, Chao
5710a067-6320-4f5a-8689-7881f6c46252
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Hong, Zekun, Sugiura, Shinya, Xu, Chao and Hanzo, Lajos
(2024)
Precoded faster-than-Nyquist signaling using optimal power allocation for OTFS.
IEEE Wireless Communications Letters.
(doi:10.1109/LWC.2024.3491777).
Abstract
A precoded orthogonal time frequency space (OTFS) modulation scheme relying on faster-than-Nyquist (FTN) transmission over doubly selective fading channels is proposed, which enhances the spectral efficiency and improves the Doppler resilience. We derive the input-output relationship of the FTN signaling in the delay-Doppler domain. Eigenvalue decomposition (EVD) is used for eliminating both the effects of inter-symbol interference and correlated additive noise encountered in the delay-Doppler domain to enable efficient symbol-by-symbol demodulation. Furthermore, the power allocation coefficients of individual frames are optimized for maximizing the mutual information under the constraint of the derived total transmit power. Our performance results demonstrate that the proposed FTN-based OTFS scheme can enhance the information rate while achieving a comparable BER performance to that of its conventional Nyquist-based OTFS counterpart that employs the same root-raised-cosine shaping filter.
Text
final-2
- Accepted Manuscript
More information
e-pub ahead of print date: 5 November 2024
Published date: 5 November 2024
Keywords:
faster-than-Nyquist signaling, OTFS, mutual information, precoding, doubly selective fading, information rate
Identifiers
Local EPrints ID: 496058
URI: http://eprints.soton.ac.uk/id/eprint/496058
ISSN: 2162-2337
PURE UUID: 006608f1-04f0-4d76-bd64-ff10547676ca
Catalogue record
Date deposited: 02 Dec 2024 17:43
Last modified: 05 Dec 2024 02:43
Export record
Altmetrics
Contributors
Author:
Zekun Hong
Author:
Shinya Sugiura
Author:
Chao Xu
Author:
Lajos Hanzo
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics