H04L 27/2021
In which the phase change per symbol period is not constrained
Official title: {in which the phase change per symbol period is not constrained}
H04L27/2021 (In which the phase change per symbol period is not constrained) appears on 45 US grants and 11 published applications in this corpus.
Search patents in H04L- Granted patents
- 45
- Published applications
- 11
- Assignees
- 38
- Inventors
- 72
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 7 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2006 | 2 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 2 |
| 2021 | 2 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Signal processing method and apparatus22 Sep 2026US 12,744,696 B2Huawei Technologies Co., Ltd.
- Featureless low-probability interception/detection waveform via continuously variable symbol rate transmission26 Oct 2021US 11,159,939 B2BAE Systems Information and Electronic Systems Integration Inc.
- Methods and communication apparatuses for bit-to-symbol mapping29 Jun 2021US 11,050,602 B2Ntt Docomo, Inc.
- Applying random phase to multicast data5 May 2020US 10,645,540 B2Lenovo (Singapore) Pte. Ltd.
- Communication system employing chaotic sequence based frequency shift keying spreading signals15 Oct 2019US 10,447,339 B2Chaos Prime Inc.
- Signal processing method and apparatus12 Jun 2025US 2025/0193059 A1Huawei Technologies Co., Ltd.
- Featureless low-probability interception/detection waveform via continuously variable symbol rate transmission6 May 2021US 2021/0136568 A1BAE Systems Information and Electronic Systems Integration Inc.
- Methods and communication apparatuses for bit-to-symbol mapping3 Sep 2020US 2020/0280476 A1Ntt Docomo, Inc.
- Applying random phase to multicast data2 Jan 2020US 2020/0008015 A1Lenovo (Singapore) Pte. Ltd.
- Communication system employing chaotic sequence based frequency shift keying spreading signals25 Oct 2018US 2018/0309477 A1Chaos Prime Inc.
Most cited
By later US patents
- Digital continuous phase modulation for a DDS-driven phase locked loop125US 5,834,985 ATelefonaktiebolaget'l M Ericsson (Publ) · 1998
- Digital modulation employing single sideband with suppressed carrier100US 5,930,303 A1999
- Method of, and transmitter for, transmitting a digital signal50US 5,428,643 AU. S. Philips Corporation · 1995
- Arrangement for generating an angle-modulated carrier signal of a constant amplitude in response to data signals39US 4,686,688 AU. S. Philips Corporation · 1987
- Gaussian frequency-shift keying transciever for ISM wideband communication36US 6,480,553 B1Winbond Electronics Corp. · 2002