H04L 27/223
Demodulation in the optical domain
Official title: {Demodulation in the optical domain (optical demodulation H04B10/676)}
H04L27/223 (Demodulation in the optical domain) appears on 133 US grants and 140 published applications in this corpus.
Search patents in H04L- Granted patents
- 133
- Published applications
- 140
- Assignees
- 79
- Inventors
- 301
- Latest grant
- 1 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 0 | 7 |
| 2007 | 2 | 6 |
| 2008 | 1 | 7 |
| 2009 | 6 | 10 |
| 2010 | 7 | 22 |
| 2011 | 8 | 15 |
| 2012 | 12 | 21 |
| 2013 | 16 | 13 |
| 2014 | 29 | 10 |
| 2015 | 11 | 7 |
| 2016 | 9 | 8 |
| 2017 | 9 | 2 |
| 2018 | 3 | 3 |
| 2019 | 3 | 0 |
| 2020 | 3 | 2 |
| 2021 | 2 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Communication apparatus, communication system, communication method, and non-transitory computer readable medium1 Apr 2025US 12,267,112 B2NEC Corporation
- Subchannel encoding device, subchannel decoding device, subchannel encoding method, subchannel decoding method, and subchannel multiplexing optical communication system12 Sep 2023US 11,757,557 B2Mitsubishi Electric Corporation
- Optical receiving apparatus, optical transmitting apparatus, and frequency offset estimation method20 Sep 2022US 11,451,305 B2Nippon Telegraph and Telephone Corporation
- System and method for receiving multi-polarized signals29 Jun 2021US 11,050,505 B1General Dynamics Mission Systems, Inc.
- Power pack for the seat-related supply of power to an electrical unit, in particular in an airplane, and method for wireless reading out of status information of a power pack8 Jun 2021US 11,027,848 B2KID-Systeme GmbH
- Systems and methods/processes for optical interferometric sensing4 Jul 2024US 2024/0223421 A1
- Communication apparatus, communication system, communication method, and non-transitory computer readable medium14 Sep 2023US 2023/0291481 A1NEC Corporation
- Subchannel encoding device, subchannel decoding device, subchannel encoding method, subchannel decoding method, and subchannel multiplexing optical communication system31 Mar 2022US 2022/0103285 A1Mitsubishi Electric Corporation
- Optical receiving apparatus, optical transmitting apparatus, and frequency offset estimation method23 Dec 2021US 2021/0399809 A1Nippon Telegraph and Telephone Corporation
- Demodulating modulated signals with artificial neural networks25 Jun 2020US 2020/0204412 A1International Business Machines Corporation
Most cited
By later US patents
- Receiver structure and method for the demodulation of a quadrature-modulated signal101US 8,199,803 B2Nokia Siemens Neworks GmbH & Co. KG · 2012
- Holevo capacity achieving joint detection receiver97US 8,620,166 B2Raytheon BBN Technologies Corp. · 2013
- Optical field receiver and optical transmission system59US 8,184,992 B2Hitachi, Ltd. · 2012
- Optical receiver57US 8,478,137 B2Fujitsu Limited · 2013
- Optical differential phase shift keying transmission system having multiplexing, routing and add/replace capabilities42US 6,271,950 B1Lucent Technologies Inc. · 2001