H04B 2210/25
Distortion or dispersion compensation
H04B2210/25 (Distortion or dispersion compensation) appears on 513 US grants and 376 published applications in this corpus.
Search patents in H04B- Granted patents
- 513
- Published applications
- 376
- Assignees
- 177
- Inventors
- 881
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 11 | 0 |
| 1996 | 6 | 0 |
| 1997 | 7 | 0 |
| 1998 | 9 | 0 |
| 1999 | 24 | 0 |
| 2000 | 21 | 0 |
| 2001 | 41 | 17 |
| 2002 | 39 | 44 |
| 2003 | 40 | 46 |
| 2004 | 35 | 39 |
| 2005 | 32 | 19 |
| 2006 | 30 | 27 |
| 2007 | 18 | 20 |
| 2008 | 20 | 5 |
| 2009 | 15 | 17 |
| 2010 | 17 | 13 |
| 2011 | 2 | 14 |
| 2012 | 14 | 10 |
| 2013 | 14 | 8 |
| 2014 | 12 | 8 |
| 2015 | 12 | 5 |
| 2016 | 7 | 8 |
| 2017 | 6 | 12 |
| 2018 | 13 | 13 |
| 2019 | 16 | 14 |
| 2020 | 8 | 8 |
| 2021 | 8 | 5 |
| 2022 | 6 | 7 |
| 2023 | 6 | 8 |
| 2024 | 5 | 5 |
| 2025 | 3 | 0 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H04B 2210/258Treating each wavelength or wavelength band separatelyIndexing code227
- H04B 2210/252After the transmission line, i.e. post-compensationIndexing code150
- H04B 2210/254Before the transmission line, i.e. pre-compensationIndexing code150
- H04B 2210/256At the repeater, i.e. repeater compensationIndexing code69
Recent patents
- Method and system for blind learning of volterra equalizer parameters6 Oct 2026US 12,756,478 B2Ciena Corporation
- Optical signal transmission device and method based on digital predistortion in symbol domain26 May 2026US 12,640,761 B21FINITY Inc.
- Optical transmission system, transmission apparatus, receiving apparatus and method for device characteristic estimation19 May 2026US 12,634,015 B2NTT, Inc.
- RF steganography based on photonics17 Mar 2026US 12,580,656 B2University of Georgia Research Foundation, Inc.
- Apparatus and method for optical communication using organic photoelectric conversion device27 Jan 2026US 12,537,605 B2Incheon National University Research & Business Foundation
- Apparatus and method for optical communication using organic photoelectric conversion device14 May 2026US 2026/0135621 A1Incheon National University Research & Business Foundation
- Pilot-assisted fiber length estimation23 Apr 2026US 2026/0113114 A1Marvell Asia Pte Ltd
- Method and apparatus for interference cancellation23 Apr 2026US 2026/0113556 A1Nokia Solutions and Networks Oy
- Method and system for blind learning of volterra equalizer parameters15 Jan 2026US 2026/0019160 A1Ciena Corporation
- Optical Transmission System, Optical Transmission Method, Transmitter, and Receiver14 Nov 2024US 2024/0380491 A1Nippon Telegraph and Telephone Corporation
Most cited
By later US patents
- Apparatus and method for delivery of dispersion-compensated ultrashort optical pulses with high peak power220US 6,249,630 B1Imra America, Inc. · 2001
- Method of activating optical communication system, channel increasing/decreasing method, and computer-readable recording medium165US 6,839,160 B2Fujitsu Limited · 2005
- Optimized optical transmission system for high capacity transmission129US 5,717,510 AFujitsu Limited · 1998
- Apparatus and method for delivery of dispersion compensated ultrashort optical pulses with high peak power127US 5,862,287 AImra America, Inc. · 1999
- Multiple wavelength division multiplexing signal compensation system and method using same120US 5,224,183 AAlcatel Network Systems, Inc. · 1993