Title :
Hybrid PPM-BPSK subcarrier intensity modulation for free space optical communications
Author :
Faridzadeh, M. ; Gholami, A. ; Ghassemlooy, Z. ; Rajbhandari, S.
Author_Institution :
Dept. of ECE, Isfahan Univ. of Technol., Isfahan, Iran
Abstract :
In this paper, a new hybrid pulse position modulation - binary phase shift keying subcarrier intensity modulation (PPM-BPSK-SIM) modulation scheme for free space optical (FSO) communications is presented. The theoretical analysis error probability of the PPM-BPSK-SIM in turbulence atmospheric channel is carried out and verified using computer simulation. The performance of PPM-BPSK-SIM is compared with PPM and BPSK-SIM in a lognormal atmospheric channel for a range of turbulence variance σ2l = {0, 0.1, 0.3, 0.5 and 1.2}. The results show that the performance of PPM-BPSK-SIM is superior to BPSK-SIM for all turbulence levels, while its performance becomes better than 2-PPM for σ2l >; 0.3.
Keywords :
error statistics; optical communication; phase shift keying; PPM-BPSK-SIM; binary phase shift keying subcarrier intensity modulation; computer simulation; error probability; free space optical communication; hybrid PPM-BPSK subcarrier intensity modulation; hybrid pulse position modulation; lognormal atmospheric channel; turbulence atmospheric channel; turbulence levels; turbulence variance; Atmospheric modeling; Binary phase shift keying; Bit error rate; Optical fiber communication; Optical modulation; Optical pulses;
Conference_Titel :
Networks and Optical Communications (NOC), 2011 16th European Conference on
Conference_Location :
Newcastle-Upon-Tyne
Print_ISBN :
978-1-61284-753-5
Electronic_ISBN :
978-1-86135-373-3
