Experimental investigation of the performance of different modulation techniques under controlled FSO turbulence channel

Ijaz, Muhammad, Ghassemlooy, Zabih, Ansari, S., Adebanjo, Olusegun, Le Minh, Hoa and Rajbhandari, Sujan (2010) Experimental investigation of the performance of different modulation techniques under controlled FSO turbulence channel. In: The 5th International Symposium on Telecommunications (IST 2010), 4-6 December 2010, Iran Telecom Research Center, Tehran, Iran.

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Abstract

This paper experimentally investigates and compares the performance of the free space optics system employing three different modulation schemes, on-off keying (OOK) with nonreturn- to-zero (NRZ) and return-to-zero (RZ) and the binary phase shift keying (BPSK) operating under the turbulent atmosphere. The received average signal is measured and used to characterize the strength of the turbulence. The experiment is performed with a temperature gradient of 4 degrees at a wind velocity of 4 m/s. The temperature gradient within the controlled channel results in turbulence of a log irradiance variance of 0.002, which is classified as a very weak turbulence. The received signal eye diagram and power histograms are presented and analyzed for performance evaluation of the selected modulation schemes in the weak turbulence model.

Item Type: Conference or Workshop Item (Paper)
Subjects: H600 Electronic and Electrical Engineering
P900 Others in Mass Communications and Documentation
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Related URLs:
Depositing User: EPrint Services
Date Deposited: 18 Feb 2011 11:58
Last Modified: 09 May 2017 12:59
URI: http://nrl.northumbria.ac.uk/id/eprint/1867

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