Keywords: Coherent, QAM, Golay, coded modulation, time hybrid
Similar demonstrations are available in VPItransmissionMaker Optical Systems and on the VPIphotonics Forum.
 S. Mumtaz et al., 'Alamouti Code against PDL in Polarization Multiplexed Systems', Signal Processing in Photonic Communications, Optical Society of America, 2011.
 A. D. Shiner et al., 'Demonstration of an 8-dimensional modulation format with reduced inter-channel nonlinearities in a polarization multiplexed coherent system', Optics Express, pp.20366-74, August 2014.
 D. S. Millar et al., 'A 24-dimensional modulation format achieving 6 dB asymptotic power efficiency.', Signal Processing in Photonic Communications, Optical Society of America, 2013.