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Frequency Channel Estimation for Spectrally Efficient Frequency Division Multiplexing Systems

Ozan, W; Haigh, P; Darwazeh, I; (2017) Frequency Channel Estimation for Spectrally Efficient Frequency Division Multiplexing Systems. In: (Proceedings) IEEE Wireless Communications and Networking Conference 17 (WCNC). Green open access

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Abstract

In spectrally efficient frequency division multiplexing (SEFDM) systems, the subcarrier spacing is compressed, below the orthogonality limit, by a factor (1-α), where α ≤ 1. In such systems, inter-carrier interference (ICI) is generated between the subcarriers due to the lack of orthogonality and the received pilot symbols are affected by ICI, thus preventing the receiver from correctly estimating the channel. Considering the deterministic nature of the induced ICI, in this paper a new SEFDM frequency-domain channel estimation method is proposed that decouples the ICI from the channel. The ICI is first found analytically at the receiver using an FFT. This information is then used to estimate the channel characteristics based on received pilot symbols. We show that for various values of α, the proposed method offers similar performance to time-domain methods, with reduced computational complexity, due to the use of an FFT instead of matrix inversion.

Type: Proceedings paper
Title: Frequency Channel Estimation for Spectrally Efficient Frequency Division Multiplexing Systems
Event: IEEE Wireless Communications and Networking Conference 17 (WCNC)
Location: San Francisco, CA
Dates: 19-22 March 2017
Open access status: An open access version is available from UCL Discovery
Publisher version: https://wcnc2017.ieee-wcnc.org/
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
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: https://discovery.ucl.ac.uk/id/eprint/10055531
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