US 12,255,731 B2
Frequency division multiple access optical subcarriers
Jeffrey T. Rahn, San Jose, CA (US); Kuang-Tsan Wu, San Jose, CA (US); Steven J. Hand, San Jose, CA (US); and David F. Welch, San Jose, CA (US)
Assigned to Infinera Corporation, Sunnyvale, CA (US)
Filed by Infinera Corporation, San Jose, CA (US)
Filed on Dec. 24, 2021, as Appl. No. 17/561,805.
Application 17/561,805 is a division of application No. 16/578,398, filed on Sep. 23, 2019.
Claims priority of provisional application 62/813,151, filed on Mar. 4, 2019.
Prior Publication US 2022/0376780 A1, Nov. 24, 2022
Int. Cl. H04B 7/26 (2006.01); H04B 10/077 (2013.01); H04B 10/079 (2013.01); H04B 10/25 (2013.01); H04B 10/2575 (2013.01); H04B 10/40 (2013.01); H04B 10/50 (2013.01); H04B 10/548 (2013.01); H04B 10/61 (2013.01); H04B 10/69 (2013.01); H04J 14/00 (2006.01); H04J 14/02 (2006.01); H04J 14/08 (2006.01); H04J 99/00 (2009.01); H04L 1/00 (2006.01); H04L 5/00 (2006.01); H04Q 11/00 (2006.01)
CPC H04B 7/2656 (2013.01) [H04B 10/0773 (2013.01); H04B 10/0793 (2013.01); H04B 10/25 (2013.01); H04B 10/25754 (2013.01); H04B 10/40 (2013.01); H04B 10/503 (2013.01); H04B 10/504 (2013.01); H04B 10/505 (2013.01); H04B 10/548 (2013.01); H04B 10/61 (2013.01); H04B 10/613 (2013.01); H04B 10/69 (2013.01); H04J 14/005 (2013.01); H04J 14/0298 (2013.01); H04J 14/08 (2013.01); H04J 99/00 (2022.08); H04L 1/0041 (2013.01); H04L 1/0045 (2013.01); H04L 1/0071 (2013.01); H04L 5/001 (2013.01); H04Q 11/0005 (2013.01); H04Q 11/0067 (2013.01); H04Q 2011/0015 (2013.01); H04Q 2011/0035 (2013.01); H04Q 2011/0079 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A communication system, comprising:
a transmitter operable to output a first plurality of optical subcarriers and control information; and
a receiver operable to receive a second plurality of optical subcarriers including the first plurality of optical subcarriers and the control information, wherein a bandwidth associated with the receiver is greater than a bandwidth associated with the transmitter, the receiver including:
fast Fourier transform circuitry that generates frequency domain data;
circuitry operable to selectively null a first portion of the frequency domain data; and
inverse fast Fourier transform circuitry that outputs time domain data based on a second portion of the frequency domain data.