Channel estimation for asymmetrically clipped optical orthogonal frequency division multiplexing optical wireless communications
Channel estimation for asymmetrically clipped optical orthogonal frequency division multiplexing optical wireless communications
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- Author(s): D. Wu 1 ; Z. Wang 2 ; R. Wang 1 ; J. He 1 ; Q. Zuo 3 ; H. Zhao 1
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View affiliations
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Affiliations:
1: Special Research Centre for Optical Internet and Wireless Information Networks, Chongqing University of Posts and Telecommunications, Chongqing, People's Republic of China
2: Sanmenxia Branch, China Mobile Group Henan Co. Ltd, Sanmenxia, People's Republic of China
3: Sanmenxia Branch, Quality Supervision and Test Center for Cables and Communication Equipments of MII, Chengdu, People's Republic of China
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Affiliations:
1: Special Research Centre for Optical Internet and Wireless Information Networks, Chongqing University of Posts and Telecommunications, Chongqing, People's Republic of China
- Source:
Volume 6, Issue 5,
27 March 2012,
p.
532 – 540
DOI: 10.1049/iet-com.2011.0056 , Print ISSN 1751-8628, Online ISSN 1751-8636
A novel channel estimation method for asymmetrically clipped optical orthogonal frequency division multiplexing-based optical wireless communications systems is proposed. Different from the superimposed sequence used in traditional methods, the local matrix and superimposed periodic training are designed rationally. Furthermore, the channel impulse response coefficient of indoor optical wireless diffuse channel can be estimated exactly. The proposed method is not only accurate and simple, but can also allocate time and power flexibly, and improves the bandwidth efficiency.
Inspec keywords: indoor radio; optical modulation; channel estimation; OFDM modulation; wireless channels; matrix algebra; optical communication
Other keywords:
Subjects: Free-space optical links; Modulation and coding methods; Algebra
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