FrFT-based EO-STBC multicarrier system for transmission over doubly-dispersive channels

Hussin, Mohammed Nuri and Solyman, Ahmed and Weiss, Stephan and Soraghan, John; (2012) FrFT-based EO-STBC multicarrier system for transmission over doubly-dispersive channels. In: 2012 international symposium on wireless communication systems (ISWCS). IEEE, FRA, pp. 686-690. ISBN 9781467307611 (https://doi.org/10.1109/ISWCS.2012.6328455)

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Abstract

This paper focuses on the enhancement of extended orthogonal space-time block coding (EO-STBC) when transmitting over a doubly-dispersive channel. The frequency selective nature of the channel favours the combination with a multicarrier approach such as orthogonal frequency division multiplexing (OFDM). However, as Doppler spread increases, OFDM loses its orthogonality, resulting in severe inter-symbol (ISI) and inter-carrier interference (ICI). This is addressed firstly by the generalisation of OFDm to fractional Fourier transform (FrFT)-based multicarrier approaches, which can provide better resilience in the presence of Doppler spread. Secondly, in higher mobility scenarios, an equalisation scheme is employed, whose lower complexity in an FrFT-based multicarrier setting can further minimised by a reduction of the equaliser. Simulation results highlighting the potential performance improvements are presented.

ORCID iDs

Hussin, Mohammed Nuri, Solyman, Ahmed, Weiss, Stephan ORCID logoORCID: https://orcid.org/0000-0002-3486-7206 and Soraghan, John ORCID logoORCID: https://orcid.org/0000-0003-4418-7391;
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