US 11,689,286 B1 · Full dimensional skew estimation using cross-correlation matrix analysis

Abstract

A skew compensation system for a coherent optical communication network includes a transmitter and a receiver in operable communication with an optical transport medium of a coherent optical network. The transmitter includes a first transmitter-side tunable delay line configured to delay transmission of a first signal by a first skew amount, thereby producing a pre-compensated first signal. The receiver includes a first receiver-side tunable delay line configured to delay transmission of the pre-compensated first signal to a digital signal processor (DSP) of the receiver by a second skew amount, thereby producing a final signal that is both pre-compensated and post-compensated (i.e., fully compensated).

Claims20

Dependent claims

A skew compensation system, comprising:

a transmitter and a receiver in operable communication with one another;
the transmitter comprising a first transmitter-side tunable delay line configured to delay transmission of a first signal by a first skew amount, thereby producing a pre-compensated first signal;
the receiver comprising a first receiver-side tunable delay line configured to delay transmission of the pre-compensated first signal to a digital signal processor (DSP) of the receiver by a second skew amount, thereby producing a final signal that is both pre-compensated and post-compensated;
and
a processor configured to solve a cross-correlation matrix for the first skew amount and the second skew amount and to tune the first transmitter-side tunable delay line by the first skew amount and the first receiver-side tunable delay line by the second skew amount.

2 more elements

A method of synchronizing signals transmitted from a transmitter to a receiver in operable communication with one another, the method comprising:

processing a reference signal and a first signal each detected at the receiver to solve a cross-correlation matrix to determine a first skew amount contributed by the transmitter and a second skew amount contributed by the receiver;
providing a first transmitter-side tunable delay line delaying transmission of the first signal by the first skew amount, thereby producing a pre-compensated first signal;
and
providing a first receiver-side tunable delay line delaying transmission of the pre-compensated first signal to a digital signal processor (DSP) of the receiver by the second skew amount, thereby producing a final signal that is both pre-compensated and post-compensated.

1 more element

Dependencies are inferred from the claim text.

Full dimensional skew estimation using cross-correlation matrix analysis

Life of this patent

Full dimensional skew estimation using cross-correlation matrix analysis

Life of this patent

Abstract

Claims20