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Stabilization of decision threshold for BER improvement using double carrier modulation/differential detection for outdoor optical wireless communications


Citation

Hitam, Salasiah and Abdullah, Mohamad Khazani and Wan Adnan, Wan Azizun and Sahbudin, Ratna Kalos Zakiah (2009) Stabilization of decision threshold for BER improvement using double carrier modulation/differential detection for outdoor optical wireless communications. International Review on Computers and Software, 4 (3). pp. 301-307. ISSN 1828-6003; ESSN: 1828-6011

Abstract / Synopsis

A new transmission and detection technique namely Double Carrier Modulation/Differential Detection (DCM/Diff.D) for outdoor optical wireless (OW) is proposed. The technique employs two beams, one modulated with the data, the other with the inverted version of the same data. A differential detection technique is used at the receiver whereby the inverted data are used as the reference to perform the decision making, as opposed to the fixed threshold used in conventional technique. The probability of error under threshold instability in DCM/Diff.D technique and Intensity Modulation/Direct Detection (IM/DD) technique, is compared. A simulation under heavy rainfall condition of 8.33x10-4 cm/sec at bit rate of 2.5 Gbps with 0 dBm of optical transmitter power shows that this technique achieves an improvement of more then twice of distance of the conventional IM/DD.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Publisher: Praise Worthy Prize
Keywords: Differential detection; Intensity modulation direct detection; Non-selective scattering; Optical wireless communications; Probability of error
Depositing User: Nabilah Mustapa
Date Deposited: 08 Jun 2016 10:09
Last Modified: 28 Sep 2017 15:47
URI: http://psasir.upm.edu.my/id/eprint/16827
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