In this Letter we investigate the error performance of multiple-input multiple-output free-space optical communication systems employing intensity modulation/direct detection and operating over strong atmospheric turbulence channels. Atmospheric-induced strong turbulence fading is modeled using the negative exponential distribution. For the considered system, an approximate yet accurate analytical expression for the average bit error probability is derived and an efficient method for its numerical evaluation is proposed. Numerically evaluated and computer simulation results are further provided to demonstrate the validity of the proposed mathematical analysis.
© 2012 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: March 23, 2012
Revised Manuscript: May 28, 2012
Manuscript Accepted: June 16, 2012
Published: July 27, 2012
Kostas P. Peppas, Fotis Lazarakis, Antonis Alexandridis, and Kostas Dangakis, "Simple, accurate formula for the average bit error probability of multiple-input multiple-output free-space optical links over negative exponential turbulence channels," Opt. Lett. 37, 3243-3245 (2012)