US 11,689,286 B1
Full dimensional skew estimation using cross-correlation matrix analysis
Mu Xu, Broomfield, CO (US); Junwen Zhang, Broomfield, CO (US); Haipeng Zhang, Broomfield, CO (US); Zhensheng Jia, Superior, CO (US); and Luis Alberto Campos, Superior, CO (US)
Assigned to Cable Television Laboratories, Inc., Louisville, CO (US)
Filed by Cable Television Laboratories, Inc., Louisville, CO (US)
Filed on Dec. 3, 2021, as Appl. No. 17/541,868.
Application 17/541,868 is a continuation of application No. 17/166,611, filed on Feb. 3, 2021, granted, now 11,223,421.
Claims priority of provisional application 62/969,344, filed on Feb. 3, 2020.
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 10/00 (2013.01); H04B 10/2507 (2013.01); H04B 10/58 (2013.01)
CPC H04B 10/2507 (2013.01) [H04B 10/58 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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.