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Truncating and Oversampling OFDM Signals in White Gaussian Noise Channels

Ozan, W; Jamieson, K; Darwazeh, I; (2016) Truncating and Oversampling OFDM Signals in White Gaussian Noise Channels. In: Proceedings of the 2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP). IEEE: Prague, Czech Republic. Green open access

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Abstract

This work introduces a modified version of the orthogonal frequency division multiplexing (OFDM) signal by truncating OFDM symbols in the time domain. Sub-carriers are no longer orthogonally packed in the frequency domain as time samples are only partially transmitted, leading to improved spectral efficiency. In this work, mathematical expressions are derived for the newly proposed Truncated OFDM (TOFDM) signal, followed by interference analysis and performance comparisons. We also consider optimal and practical decoder architectures. Results from a Sphere Decoder-based decoder indicate that truncation length can significantly affect the error performance. With short truncation length, using a purpose designed detector, signals can be recovered even with truncated symbol transmission.

Type: Proceedings paper
Title: Truncating and Oversampling OFDM Signals in White Gaussian Noise Channels
Event: 2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)
Location: Budapest
Dates: 20 July 2016 - 22 July 2016
ISBN-13: 9781509025268
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/CSNDSP.2016.7573986
Publisher version: http://dx.doi.org/10.1109/CSNDSP.2016.7573986
Language: English
Additional information: Copyright © 2016 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.
Keywords: OFDM, Time-domain analysis, Interference, Bandwidth, Modulation, Time-frequency analysis, SEFDM, Multicarrier modulation, Truncated OFDM
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1527421
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