Efficient frequency-domain channel equalisation methods for OFDM visible light communications

Bangjiang Lin; Xuan Tang; Zabih Ghassemlooy; Shihao Zhang; Yiwei Li; Yi Wu; Hui Li

doi:10.1049/iet-com.2016.0787

Efficient frequency-domain channel equalisation methods for OFDM visible light communications

Bangjiang Lin, Xuan Tang, Zabih Ghassemlooy, Shihao Zhang, Yiwei Li, Yi Wu, Hui Li

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Abstract

The authors present efficient frequency-domain channel estimation methods based on the intra-symbol frequency-domain averaging (ISFA), minimum mean squared error (MMSE) and weighted inter-frame averaging (WIFA) schemes for the orthogonal frequency division multiplexing (OFDM) visible light communications (VLC) system. OFDM-VLC with quadrature phase shift keying, 16- and 64-quadrature amplitude modulation mapping is experimentally demonstrated. Compared with the conventional least square channel estimation method, ISFA, MMSE and WIFA offer improved performance with MMSE offering the best performance in terms of the error vector magnitude but at the cost of high complexity. The authors show that the WIFA can improve the estimation accuracy of time-varying VLC optical channel.

Original language	English
Pages (from-to)	25-29
Journal	IET Communications
Volume	11
Issue number	1
Early online date	22 Dec 2016
DOIs	https://doi.org/10.1049/iet-com.2016.0787
Publication status	Published - Jan 2017

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title = "Efficient frequency-domain channel equalisation methods for OFDM visible light communications",

abstract = "The authors present efficient frequency-domain channel estimation methods based on the intra-symbol frequency-domain averaging (ISFA), minimum mean squared error (MMSE) and weighted inter-frame averaging (WIFA) schemes for the orthogonal frequency division multiplexing (OFDM) visible light communications (VLC) system. OFDM-VLC with quadrature phase shift keying, 16- and 64-quadrature amplitude modulation mapping is experimentally demonstrated. Compared with the conventional least square channel estimation method, ISFA, MMSE and WIFA offer improved performance with MMSE offering the best performance in terms of the error vector magnitude but at the cost of high complexity. The authors show that the WIFA can improve the estimation accuracy of time-varying VLC optical channel.",

author = "Bangjiang Lin and Xuan Tang and Zabih Ghassemlooy and Shihao Zhang and Yiwei Li and Yi Wu and Hui Li",

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T1 - Efficient frequency-domain channel equalisation methods for OFDM visible light communications

AU - Lin, Bangjiang

AU - Tang, Xuan

AU - Ghassemlooy, Zabih

AU - Zhang, Shihao

AU - Li, Yiwei

AU - Wu, Yi

AU - Li, Hui

PY - 2017/1

Y1 - 2017/1

N2 - The authors present efficient frequency-domain channel estimation methods based on the intra-symbol frequency-domain averaging (ISFA), minimum mean squared error (MMSE) and weighted inter-frame averaging (WIFA) schemes for the orthogonal frequency division multiplexing (OFDM) visible light communications (VLC) system. OFDM-VLC with quadrature phase shift keying, 16- and 64-quadrature amplitude modulation mapping is experimentally demonstrated. Compared with the conventional least square channel estimation method, ISFA, MMSE and WIFA offer improved performance with MMSE offering the best performance in terms of the error vector magnitude but at the cost of high complexity. The authors show that the WIFA can improve the estimation accuracy of time-varying VLC optical channel.

AB - The authors present efficient frequency-domain channel estimation methods based on the intra-symbol frequency-domain averaging (ISFA), minimum mean squared error (MMSE) and weighted inter-frame averaging (WIFA) schemes for the orthogonal frequency division multiplexing (OFDM) visible light communications (VLC) system. OFDM-VLC with quadrature phase shift keying, 16- and 64-quadrature amplitude modulation mapping is experimentally demonstrated. Compared with the conventional least square channel estimation method, ISFA, MMSE and WIFA offer improved performance with MMSE offering the best performance in terms of the error vector magnitude but at the cost of high complexity. The authors show that the WIFA can improve the estimation accuracy of time-varying VLC optical channel.

UR - https://www.scopus.com/pages/publications/85006970077

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DO - 10.1049/iet-com.2016.0787

M3 - Article

SN - 1751-8628

VL - 11

SP - 25

EP - 29

JO - IET Communications

JF - IET Communications

IS - 1

ER -

Efficient frequency-domain channel equalisation methods for OFDM visible light communications

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