Title :
Receiver Optimization in Turbulent Free-Space Optical MIMO Channels With APDs and Q-ary PPM
Author :
Cvijetic, Neda ; Wilson, Stephen G. ; Brandt-Pearce, Maïté
Author_Institution :
Charles L. Brown Dept. of Electr. & Comput. Eng., Virginia Univ., Charlottesville, VA
Abstract :
We propose an accurate, robust avalanche photodiode (APD) receiver optimization scheme for multiple-input/multiple-output (MIMO) free-space optical links with Q-ary pulse position modulation in the presence of atmospheric turbulence. Through extensive error probability (Pe ) analysis, we show that selecting the APD gain such that the nonfading receiver-array signal-to-noise ratio is maximized essentially minimizes Pe in turbulent MIMO channels with M=2 transmitters and N=2 receivers, for several turbulence and background-radiation levels of interest
Keywords :
MIMO communication; atmospheric turbulence; avalanche photodiodes; error statistics; optical links; optical receivers; telecommunication channels; APD; Q-ary PPM; atmospheric turbulence; avalanche photodiode; extensive error probability; multiple-input/multiple output free-space optical links; optical MIMO channels; receiver optimization; Avalanche photodiodes; Error probability; MIMO; Optical fiber communication; Optical modulation; Optical pulses; Optical receivers; Optical transmitters; Pulse modulation; Robustness; Atmospheric turbulence; avalanche photodiode (APD); free-space optical (FSO) communication; multiple -input/multiple-output (MIMO) processing; pulse-position modulation (PPM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.889105
