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Optimal Pilot Sequences for Timing Estimation in Faster-than-Nyquist Systems

Mounsif, Leila and Roque, Damien Optimal Pilot Sequences for Timing Estimation in Faster-than-Nyquist Systems. (2021) IEEE Communications Letters, 25 (4). 1236 -1240. ISSN 1089-7798

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Official URL: https://doi.org/10.1109/LCOMM.2020.3045512

Abstract

Traditional synchronization techniques are usually challenged by Faster-than-Nyquist (FTN) signals which discard orthogonal pulses to the advantage of an increased spectral efficiency. In this paper, we studied data-aided timing estimation in FTN scenarios, based on the Cramér--Rao bound minimization. We established a closed-form approximation of the bound to explain the relation between optimal pilot sequences and the waveform's parameters (i.e., signaling density and pulse shape). In particular, we showed that optimal sequences at the Nyquist-rate are non-informative in FTN scenarios if regular lowpass pulses are used.

Item Type:Article
Additional Information:Thanks to the IEEE (Institute of Electrical and Electronics Engineers). This paper is available at : https://ieeexplore.ieee.org/document/9296736 “© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Audience (journal):International peer-reviewed journal
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Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
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Funders:
DGA/MRIS under grant 2018.60.0014
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Deposited On:20 Jul 2020 09:13

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