Optical Orbital Angular Momentum for Secure and Power Efficient Point-to-Point FSO Communications

• Main Authors: Alfowzan, Mohammed, Khatami, Mehrdad, Vasic, Bane
• Other Authors: University of Arizona
• Language: en_US
• Published: International Foundation for Telemetering 2013
• Subjects: free space optical communication; orbital angular momentum; turbulent channels; channel crosstalk
• Online Access: http://hdl.handle.net/10150/579526

ITC/USA 2013 Conference Proceedings / The Forty-Ninth Annual International Telemetering Conference and Technical Exhibition / October 21-24, 2013 / Bally's Hotel & Convention Center, Las Vegas, NV === We address the problem of detection in orbital angular momentum (OAM). The focus of our analysis will be on the power efficient Q-ary Pulse Position Modulation (Q - PPM). Free space optical signals sent through wireless channels are degraded by atmospheric turbulence. In this paper a novel detection approach based on a factor graph representation of OAM Q-PPM signalling is presented to equalize for the crosstalk among orbital angular momentum vortices. It will be shown that our proposed detection algorithm significantly outperforms the separate detection scenario in terms of error rate performance.