Patent ID: 8787777
Filing Date: 2014-07-22
Classification: H04B

Abstract:
1. A method performed by a device, the method comprising: receiving a plurality of electrical signals from an optical receiver and via a plurality of channels; identifying a first signal, of the plurality of electrical signals, as a reference signal that is received via a first channel of the plurality of channels; identifying a second signal, of the plurality electrical signals, as an orthogonal signal that is received via a second channel, of the plurality of channels, where the second signal is orthogonal to the first signal; measuring a plurality of skew values based on a difference in arrival times between one or more other electrical signals, of the plurality of electrical signals, and the reference signal or the orthogonal signal; generating a plurality of de-skew values based on at least a portion of the plurality of skew values; and transmitting the plurality of de-skew values, to the optical receiver, where transmitting the plurality of de-skew values allows the optical receiver to de-skew signals on the plurality of channels where the plurality electrical signals are generated, by the optical receiver, as a result of processing an optical signal received from an optical transmitter, and where the optical signal has a scrambled polarization state, the scrambled polarization state including a polarization of the optical signal that changes as a function of time.