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

Muhammad Ijaz, Zabih Ghassemlooy, S. Ansari, Olusegun Adebanjo, Hoa Le Minh, Sujan Rajbhandari

Research output: Contribution to conferencePaperpeer-review

20 Citations (Scopus)

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.
Original languageEnglish
Publication statusPublished - Dec 2010
EventThe 5th International Symposium on Telecommunications (IST 2010) - Iran Telecom Research Center, Tehran, Iran
Duration: 1 Dec 2010 → …
http://ist2010.itrc.ac.ir/

Conference

ConferenceThe 5th International Symposium on Telecommunications (IST 2010)
Period1/12/10 → …
Internet address

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