title: Exact error rate analysis of equal gain and selection diversity for coherent free-space optical systems on strong turbulence channels.
abstract: Exact error rate performances are studied for coherent free-space optical communication systems under strong turbulence with diversity reception. Equal gain and selection diversity are considered as practical schemes to mitigate turbulence. The exact bit-error rate for binary phase-shift keying and outage probability are developed for equal gain diversity. Analytical expressions are obtained for the bit-error rate of differential phase-shift keying and asynchronous frequency-shift keying, as well as for outage probability using selection diversity. Furthermore, we provide the closed-form expressions of diversity order and coding gain with both diversity receptions. The analytical results are verified by computer simulations and are suitable for rapid error rates calculation.
authors.affiliation: University of British Columbia, School of Engineering, Faculty of Applied Science, Kelowna, B.C., Canada.
authors.forename: Mingbo
authors.initials: M
authors.lastname: Niu
authors.forename: Julian
authors.initials: J
authors.lastname: Cheng
authors.forename: Jonathan F
authors.initials: JF
authors.lastname: Holzman
mesh_terms: D001272:Atmosphere; D003198:Computer Simulation; D004868:Equipment Failure; D005336:Fiber Optic Technology / Q000379:methods* / Q000592:standards*; D008962:Models, Theoretical; D015203:Reproducibility of Results