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Robust channel estimation for spectrally efficient FDM system

Isam, S; Darwazeh, I; (2012) Robust channel estimation for spectrally efficient FDM system. In:

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Abstract

Spectrally Efficient Frequency Division Multiplexing (SEFDM) system employs non-orthogonal multiple carriers in order to enhance utilization of bandwidth over the Orthogonal Frequency Division Multiplexing system (OFDM). However, the deliberate loss of orthogonality affects many aspects of the system. In particular, the intercarrier interference results in the system becoming ill-conditioned, thus affecting the performance of the system, and particular to this work, the channel estimation accuracy. Therefore, in this work, a novel channel estimation technique benefiting from the structure of the SEFDM system to tackle the ill-conditioning is tailored. The technique is termed Partial Channel Estimation (PCE) and is based on transmitting pilot symbols invoking the partial orthogonality structure of the system to avoid the ill-conditioning impact and thus, is capable of delivering more accurate estimates. Numerical performance of the proposed estimator confirms favorable estimation accuracy and demonstrates a tangible error performance improvement and complexity reduction. © 2012 IEEE.

Type: Proceedings paper
Title: Robust channel estimation for spectrally efficient FDM system
ISBN-13: 9781467307475
DOI: 10.1109/ICTEL.2012.6221292
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/1383897
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