An optical wireless communication system using subcarrier intensity modulation is analyzed for gamma–gamma turbulence channels with pointing errors. We study the error rate performance of such a system employing M-ary phase-shift keying, differential phase-shift keying, and noncoherent frequency-shift keying. Highly accurate error rate approximations are derived using a series expansion approach. Furthermore, outage probability expressions are obtained for such a system. Asymptotic error rate and outage probability analyses are also presented. Our asymptotic analysis reveals some unique transmission characteristics of such a system. Our findings suggest that pointing error compensation is necessary as pointing errors can severely degrade the error rate and outage probability performance of an uncompensated system.
© 2013 Optical Society of America
Original Manuscript: September 14, 2012
Revised Manuscript: February 7, 2013
Manuscript Accepted: February 7, 2013
Published: March 28, 2013
Xuegui Song, Fan Yang, and Julian Cheng, "Subcarrier Intensity Modulated Optical Wireless Communications in Atmospheric Turbulence With Pointing Errors," J. Opt. Commun. Netw. 5, 349-358 (2013)