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Experimental Evaluation of Channel Estimation and Equalisation in Non-Orthogonal FDM Systems

Ozan, W; Ghannam, H; Xu, T; Haigh, P; Darwazeh, I; (2018) Experimental Evaluation of Channel Estimation and Equalisation in Non-Orthogonal FDM Systems. In: 2018 11th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP). IEEE Green open access

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Abstract

This paper describes the design and implementation of an experimental system created to evaluate the performance of channel estimation and equalisation for spectrally efficient frequency division multiplexing (SEFDM) systems in which higher spectral efficiency compared to conventional orthogonal frequency division multiplexing (OFDM) is achieved by violating the orthogonality of its subcarriers. This work proposes a new frequency-domain channel estimation and equalisation method, then investigates the employment of both OFDM and SEFDM pilot symbols for channel estimation to find channel state information (CSI). It is experimentally shown that the new method offers a reduction in the computational complexity compared to conventional time-domain estimation and equalisation for SEFDM systems with a similar system performance. The design of the baseband signal generation and signal detection using IFFT and FFT structure implemented using LabVIEW communication design suite is described in detail together with the baseband design of the system used to effect signal synchronisation and channel estimation and equalisation.

Type: Proceedings paper
Title: Experimental Evaluation of Channel Estimation and Equalisation in Non-Orthogonal FDM Systems
Event: 2018 11th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP), 18-20 July 2018, Budapest, Hungary
ISBN-13: 978-1-5386-1336-8
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/CSNDSP.2018.8471885
Publisher version: https://doi.org/10.1109/CSNDSP.2018.8471885
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Channel estimation, OFDM, Frequency-domain analysis, Bandwidth, Fading channels, Baseband, Interference
UCL classification: 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 Electronic and Electrical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/10051811
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