Citation
Hitam, Salasiah and Abdullah, Mohamad Khazani and Wan Adnan, Wan Azizun and Sheikh Naimullah, Bibi Sarpinah
(2008)
BER improvement for multi-gigabits-per-second free space optical communications by stabilizing the decision threshold level.
International Journal of Engineering and Technology, 5 (2).
pp. 83-91.
ISSN 1823-1039
Abstract
A new transmission and detection technique namely Double Carrier Modulation/Differential Detection (DCM/Diff.D) for free space optical (FSO) 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: |
Federation of Engineering Institutions of Islamic Countries |
Keywords: |
Differential detection; Intensity modulation direct detection; Free space optical; Non-selective scattering; Probability of error |
Depositing User: |
Nabilah Mustapa
|
Date Deposited: |
02 Jul 2018 02:53 |
Last Modified: |
02 Jul 2018 02:53 |
URI: |
http://psasir.upm.edu.my/id/eprint/13383 |
Statistic Details: |
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