Optical wireless communication using positive real-valued orthogonal frequency-division multiplexing and optical beamforming

Sung-Man Kim; Ki-Keun Kwon

doi:10.1117/1.OE.56.7.076105

20 July 2017 Optical wireless communication using positive real-valued orthogonal frequency-division multiplexing and optical beamforming

Sung-Man Kim, Ki-Keun Kwon

Author Affiliations +

Optical Engineering, Vol. 56, Issue 7, 076105 (July 2017). https://doi.org/10.1117/1.OE.56.7.076105

Abstract

The relatively unsatisfactory performance of optical wireless communication (OWC) with respect to WiFi and millimeter-wave communications has formed a key issue preventing its commercialization. We experimentally demonstrate an OWC technology using a combination of positive real-valued orthogonal frequency-division multiplexing (OFDM) and optical beamforming (OB). Due to the intensity-modulation and direct-detection aspects of OWC systems, a positive real-valued OFDM signal can be suitably utilized to maximize the OWC data rate. Further, the OB technique, which can focus laser light on a desired target, can be utilized to increase the OWC data rate and transmission distance. Our experimental results show that the received optical signal power and electrical signal increase by up to 42 and 25 dB, respectively. Further, the data rate increases by a factor of 200 with OB over the conventional approach.

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Sung-Man Kim and Ki-Keun Kwon "Optical wireless communication using positive real-valued orthogonal frequency-division multiplexing and optical beamforming," Optical Engineering 56(7), 076105 (20 July 2017). https://doi.org/10.1117/1.OE.56.7.076105

Received: 29 March 2017; Accepted: 29 June 2017; Published: 20 July 2017

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