Patent ID: 9252889
Filing Date: 2016-02-02
CPC Classification: H04B

Claim Text:
1. A method for optical transmission of an optical signal comprising a binary content comprising transmitting the optical signal with the binary content comprising a first logic-high and a first logic-low defining a first modulation amplitude wherein the first modulation amplitude is sub-band modulated with a toggling signal having a first toggling amplitude with a first modulation index relative to said first modulation amplitude, receiving said optical signal with an optical receiver circuit and converting the optical signal to an intermediate electrical signal, IES, said IES having the following parameters: providing a decision threshold relative to said IES as a function of said second modulation amplitude, and adjusting the decision threshold by determine the second toggling amplitude and adjusting said decision threshold relative to said IES based on proportionality between the second toggling amplitude and said second modulation amplitude.