US 11,901,952 B2
Tap centerer method and structure for coherent optical receiver
Mario R. Hueda, Córdoba (AR); José Correa, Córdoba (AR); and Oscar E. Agazzi, Irvine, CA (US)
Assigned to Marvell Asia Pte Ltd., Singapore (SG)
Filed by MARVELL ASIA PTE LTD., Singapore (SG)
Filed on Aug. 11, 2022, as Appl. No. 17/885,781.
Application 17/885,781 is a continuation of application No. 17/166,900, filed on Feb. 3, 2021, granted, now 11,424,834, issued on Aug. 23, 2022.
Application 17/166,900 is a continuation of application No. 16/669,239, filed on Oct. 30, 2019, granted, now 10,944,485, issued on Mar. 9, 2021.
Application 16/669,239 is a continuation of application No. 16/153,341, filed on Oct. 5, 2018, granted, now 10,498,462, issued on Dec. 3, 2019.
Application 16/153,341 is a continuation of application No. 15/792,582, filed on Oct. 24, 2017, granted, now 10,128,959, issued on Nov. 13, 2018.
Claims priority of provisional application 62/412,071, filed on Oct. 24, 2016.
Claims priority of provisional application 62/412,039, filed on Oct. 24, 2016.
Claims priority of provisional application 62/412,052, filed on Oct. 24, 2016.
Claims priority of provisional application 62/412,033, filed on Oct. 24, 2016.
Claims priority of provisional application 62/412,047, filed on Oct. 24, 2016.
Claims priority of provisional application 62/412,002, filed on Oct. 24, 2016.
Claims priority of provisional application 62/412,015, filed on Oct. 24, 2016.
Prior Publication US 2022/0393772 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 10/61 (2013.01); H04L 25/03 (2006.01); H04L 7/00 (2006.01); H04L 27/26 (2006.01); H04B 10/079 (2013.01); H04L 1/00 (2006.01); H04B 10/40 (2013.01)
CPC H04B 10/6162 (2013.01) [H04B 10/079 (2013.01); H04B 10/615 (2013.01); H04B 10/616 (2013.01); H04B 10/6161 (2013.01); H04B 10/6165 (2013.01); H04L 1/0045 (2013.01); H04L 7/0075 (2013.01); H04L 25/03019 (2013.01); H04L 25/03159 (2013.01); H04L 27/2662 (2013.01); H04L 27/2697 (2013.01); H04B 10/40 (2013.01); H04L 27/2634 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A coherent optical receiver, comprising:
equalizer circuitry having a plurality of taps, the equalizer circuitry being configured to (i) receive an input signal and (ii) compensate for polarization mode dispersion affecting the input signal to generate a compensated input signal;
error evaluation circuitry configured to
calculate a determinant of a frequency-domain (FD) coefficient-based matrix using a plurality of tap signals from among the plurality of taps, and
determine an error of convergence corresponding to transmission delays of symbols of the compensated input signal; and
timing recovery circuitry configured to adjust phase of the compensated input signal based on the determined error of convergence.