The University of Southern California (USC), founded in 1880, is a private, comprehensive research university in Los Angeles. It provides undergraduates with an extraordinary range of academic programs and encourages study and research across disciplines, making significant contributions as a major research institution. NEC Labs America teams up with USC to explore cutting-edge topics in human-machine interaction, gesture recognition, and privacy-conscious visual analytics. Our joint publications contribute to the development of secure, socially responsible AI systems. Please read about our latest news and collaborative publications with the University of Southern California.

Posts

Coherent optical wireless communication link employing orbital angular momentum multiplexing in a ballistic and diffusive scattering medium

/in /by

We experimentally investigate the scattering effect on an 80 Gbit/s orbital angular momentum (OAM) multiplexed optical wireless communication link. The power loss, mode purity, cross talk, and bit error rate performance are measured and analyzed for different OAM modes under scattering levels from ballistic to diffusive regions. Results show that (i) power loss is the main impairment in the ballistic scattering, while the mode purities of different OAM modes are not significantly affected; (ii) in the diffusive scattering, however, the performance of an OAM-multiplexed link further suffers from the increased cross talk between the different OAM modes.

Read more