As a note on how computing power has improved since 1989, we can now remove impairments and decode optical nPSK at 32Gbd/s ~155k Symbols (2-4 bits per symbol in

As a note on how computing power has improved since 1989, we can now remove impairments and decode optical nPSK at 32Gbd/s ~155k Symbols (2-4 bits per symbol in 2 polarizations) in about 8s using offline processing (data captured from a device like high sample rate sampling scope).