Optimised diffusion spots’ locations for simultaneous improvement in SNR and delay spread

Optimised diffusion spots’ locations for simultaneous improvement in SNR and delay spread In this paper, two recent global optimisation techniques: particle swarm optimisation and central force optimisation are considered for optimising the location of the diffusion spots, which are used as transmitters in an indoor optical wireless communications system. The diffusion spots are uniformly distributed along a circle on the ceiling of the communications environment. The location of the diffusion spots is optimised for maximising the signal-to-noise ratio and minimising the root-mean-square delay spread at the receivers in the presence of noise sources. A performance comparison between the central located position of the spots and the optimised positions for three different scenarios is considered to validate and show the strengths of the applied optimisation techniques in solving this sort of problems. The used techniques can provide the communication system with the ability to adapt to changes in the surrounding environment, which will benefit future switching towards real-time intelligent systems. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Photonic Network Communications Springer Journals

Optimised diffusion spots’ locations for simultaneous improvement in SNR and delay spread

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Publisher
Springer Journals
Copyright
Copyright © 2015 by Springer Science+Business Media New York
Subject
Computer Science; Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials
ISSN
1387-974X
eISSN
1572-8188
D.O.I.
10.1007/s11107-015-0574-3
Publisher site
See Article on Publisher Site

Abstract

In this paper, two recent global optimisation techniques: particle swarm optimisation and central force optimisation are considered for optimising the location of the diffusion spots, which are used as transmitters in an indoor optical wireless communications system. The diffusion spots are uniformly distributed along a circle on the ceiling of the communications environment. The location of the diffusion spots is optimised for maximising the signal-to-noise ratio and minimising the root-mean-square delay spread at the receivers in the presence of noise sources. A performance comparison between the central located position of the spots and the optimised positions for three different scenarios is considered to validate and show the strengths of the applied optimisation techniques in solving this sort of problems. The used techniques can provide the communication system with the ability to adapt to changes in the surrounding environment, which will benefit future switching towards real-time intelligent systems.

Journal

Photonic Network CommunicationsSpringer Journals

Published: Oct 15, 2015

References

  • A genetic algorithm method for optical wireless channel control
    Higgins, MD; Green, RJ; Leeson, MS
  • Fast and efficient adaptation algorithms for multi-gigabit wireless infrared systems
    Alsaadi, FE; Alhartomi, MA; Elmirghani, JMH
  • Improvement of transmission bandwidth for indoor optical wireless communication systems using an elliptical Lambertian beam
    Dehao, Wu; Ghassemlooy, Z; Rajbhandari, S; Minh, H; Boucouvalas, AC

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