Patent ID: 9225431
Filing Date: 2015-12-29
Classification: H04B

Abstract:
1. A method comprising: utilizing a value of a sampling rate, with a controller, to determine at least one of a first portion and a second portion of a frequency domain representation of a combination of one or more input data streams having chromatic dispersion, wherein the sampling rate is greater than a baud rate of the one more input data streams and less than or equal to twice the baud rate of the one or more input data streams; determining, with the controller, complex conjugate values of the first portion of the frequency domain representation of the combination of the one or more input data streams having chromatic dispersion; pointwise multiplying, with the controller, the complex conjugate values with the second portion of the frequency domain representation of the combination of the one or more input data streams having the chromatic dispersion; applying, with the controller, a transform to results of the pointwise multiplication; determining, with the controller, a transform bin value from results of the transform; determining, with the controller, an estimate of the chromatic dispersion from the determined transform bin value; determining, with the controller, filter tap coefficients, based on the determined estimate of the chromatic dispersion, for a chromatic dispersion filter configured to compensate for the chromatic dispersion of the one or more input data streams; and configuring, with the controller, the chromatic dispersion filter in accordance with the determined filter tap coefficients.