H04B 10/5561
Digital phase modulation
Official title: {Digital phase modulation}
H04B10/5561 (Digital phase modulation) appears on 441 US grants and 475 published applications in this corpus.
Search patents in H04B- Granted patents
- 441
- Published applications
- 475
- Assignees
- 157
- Inventors
- 817
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 2 |
| 2003 | 1 | 8 |
| 2004 | 6 | 4 |
| 2005 | 0 | 12 |
| 2006 | 5 | 13 |
| 2007 | 6 | 23 |
| 2008 | 12 | 17 |
| 2009 | 13 | 25 |
| 2010 | 13 | 24 |
| 2011 | 17 | 24 |
| 2012 | 27 | 26 |
| 2013 | 20 | 21 |
| 2014 | 34 | 22 |
| 2015 | 34 | 38 |
| 2016 | 29 | 32 |
| 2017 | 41 | 30 |
| 2018 | 25 | 24 |
| 2019 | 39 | 29 |
| 2020 | 28 | 25 |
| 2021 | 24 | 24 |
| 2022 | 26 | 17 |
| 2023 | 16 | 8 |
| 2024 | 9 | 11 |
| 2025 | 10 | 10 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for in-phase and quadrature modulation16 Jun 2026US 12,659,044 B2Huawei Technologies Co., Ltd.
- Polarization modulator with separate optical sections14 Apr 2026US 12,601,936 B2Tesat-Spacecom GmbH & Co. KG
- Semiconductor IQ modulator24 Feb 2026US 12,560,852 B2NTT, Inc.
- Optical signal state estimation apparatus, optical signal state estimation method, and non-transitory computer-readable storage medium20 Jan 2026US 12,531,640 B2NEC Corporation
- Probabilistic constellation shaping of multi-dimensional symbols for improved tolerance to nonlinear impairments25 Nov 2025US 12,483,352 B2Ciena Corporation
- Optical transmission device, optical transmission system, optical module, and optical controller1 Oct 2026US 2026/0303220 A11FINITY Inc.
- Data Processing Method and Apparatus6 Aug 2026US 2026/0230225 A1Huawei Technologies Co., Ltd.
- Optical transmission system and transmitter21 May 2026US 2026/0142730 A1Fujitsu Limited
- Differential qpsk encoding and decoding23 Apr 2026US 2026/0113122 A1Attltude, Inc.
- Implementation and analysis of 3 dimensional sweeps for iq modulator calibration26 Feb 2026US 2026/0058730 A1Ciena Corporation
Most cited
By later US patents
- Optical transmission apparatuses, methods, and systems122US 7,826,752 B1Level 3 Communications, LLC · 2010
- Method and device for generating optical signals95US 8,831,440 B2Huawei Technologies Co., Ltd. · 2014
- Electro-optical integrated transmitter chip for arbitrary quadrature modulation of optical signals62US 7,272,271 B2CeLight, Inc. · 2007
- Digital radio frequency tranceiver system and method54US 8,260,143 B2Hypres, Inc. · 2012
- Optical signal transmitter54US 9,419,720 B2Fujitsu Limited · 2016