Patent ID: 9374166
Filing Date: 2016-06-21
CPC Classification: H04B

Claim Text:
1. A fiber optic system, comprising: a transmitter configured to utilize any one of a plurality of modulation formats; and a receiver communicatively coupled to the transmitter and configured to utilize any one of the plurality of modulation formats; wherein the transmitter and the receiver are cooperatively configured to set a modulation format from the plurality of modulation formats based upon an average signal-to-noise ratio at the receiver instead of a worst case signal-to-noise ratio at the receiver; and wherein the transmitter and the receiver utilize an in-band communication channel for signaling modulation format changes and utilize a blind system recovery mechanism to re-establish the in-band communication channel subsequent to a disruption that causes the in-band communication channel to fail based on any of a Loss of Frame (LOF), a Loss of Multi-frame (LOM), and a degradation in Signal-to-Noise Ratio (SNR), and wherein the blind system recovery mechanism operates to establish the in-band communication channel and the blind system recovery mechanism uses a predetermined modulation format change cycle occurring at each of the transmitter and the receiver instead of end-to-end modulation mode signaling changes between the transmitter and the receiver.