Title :
Optical Wireless Communications With Heterodyne Detection Over Turbulence Channels With Pointing Errors
Author :
Sandalidis, Harilaos G. ; Tsiftsis, Theodoros A. ; Karagiannidis, George K.
Author_Institution :
Dept. of Comput. Sci. & Biomed. Inf., Univ. of Central Greece, Lamia, Greece
Abstract :
We study the error performance of an heterodyne differential phase-shift keying (DPSK) optical wireless (OW) communication system operating under various intensity fluctuations conditions. Specifically, it is assumed that the propagating signal suffers from the combined effects of atmospheric turbulence-induced fading, misalignment fading (i.e., pointing errors) and path-loss. Novel closed-form expressions for the statistics of the random attenuation of the propagation channel are derived and the bit-error rate (BER) performance is investigated for all the above fading effects. Numerical results are provided to evaluate the error performance of OW systems with the presence of atmospheric turbulence and/or misalignment. Moreover, nonlinear optimization is also considered to find the optimum beamwidth that achieves the minimum BER for a given signal-to-noise ratio value.
Keywords :
differential phase shift keying; error statistics; fading channels; optical communication; BER; atmospheric turbulence-induced fading; bit-error rate; error performance evaluation; heterodyne detection; heterodyne differential phase-shift keying; misalignment fading; nonlinear optimization; optical wireless communication system; optical wireless communications; path-loss; signal propagation; signal-to-noise ratio value; turbulence channels; Atmospheric turbulence channel; bit-error rate (BER); heterodyne detection; misalignment fading; optical wireless (OW) communications; pointing errors;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2009.2024169
