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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 31, Iss. 11 — Jun. 1, 2013
  • pp: 1744–1754

Analysis of An Optical Wireless Receiver Using a Hemispherical Lens With Application in MIMO Visible Light Communications

Thomas Q. Wang, Y. Ahmet Sekercioglu, and Jean Armstrong

Journal of Lightwave Technology, Vol. 31, Issue 11, pp. 1744-1754 (2013)


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Abstract

White lighting LEDs offer great potential for high speed communications, especially for indoor applications. However, for their widespread adoption, two important issues need to be addressed: the lack of diversity in multiple-input multiple output (MIMO) systems, and the small field of view of receivers. In this paper, we describe a design using a hemispherical lens in the receiver that solves these problems. By using classical optics, we derive exact expressions for the channel gain and the optical power density of the projected images. Simulation results of a typical indoor scenario show that the new system has a wide field of view, and provides adequate channel gain for angles of incidence as large as 70 degrees. We present the distribution of optical power on the imaging plane for various receiving positions and tilted receivers over a number of representative indoor scenarios. They show that the images of LEDs are clearly distinguishable. The results demonstrate the presence of low channel correlations between individual transmitters and receivers. Consequently, this confirms that the new technique is capable of providing significant diversity order for MIMO optical wireless applications.

© 2013 IEEE

Citation
Thomas Q. Wang, Y. Ahmet Sekercioglu, and Jean Armstrong, "Analysis of An Optical Wireless Receiver Using a Hemispherical Lens With Application in MIMO Visible Light Communications," J. Lightwave Technol. 31, 1744-1754 (2013)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-31-11-1744


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