H04L 27/3405
Modifications of the signal space to increase the efficiency of transmission
Official title: {Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power}
H04L27/3405 (Modifications of the signal space to increase the efficiency of transmission) appears on 1,582 US grants and 1,449 published applications in this corpus.
Search patents in H04L- Granted patents
- 1,582
- Published applications
- 1,449
- Assignees
- 416
- Inventors
- 2,172
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 6 | 0 |
| 1987 | 9 | 0 |
| 1988 | 7 | 0 |
| 1989 | 7 | 0 |
| 1990 | 10 | 0 |
| 1991 | 6 | 0 |
| 1992 | 14 | 0 |
| 1993 | 9 | 0 |
| 1994 | 7 | 0 |
| 1995 | 20 | 0 |
| 1996 | 21 | 0 |
| 1997 | 18 | 0 |
| 1998 | 21 | 0 |
| 1999 | 19 | 0 |
| 2000 | 25 | 0 |
| 2001 | 14 | 2 |
| 2002 | 25 | 31 |
| 2003 | 21 | 38 |
| 2004 | 20 | 45 |
| 2005 | 17 | 37 |
| 2006 | 38 | 36 |
| 2007 | 24 | 16 |
| 2008 | 31 | 26 |
| 2009 | 42 | 39 |
| 2010 | 26 | 46 |
| 2011 | 33 | 58 |
| 2012 | 52 | 51 |
| 2013 | 56 | 35 |
| 2014 | 60 | 68 |
| 2015 | 85 | 82 |
| 2016 | 71 | 84 |
| 2017 | 91 | 78 |
| 2018 | 65 | 76 |
| 2019 | 105 | 115 |
| 2020 | 115 | 94 |
| 2021 | 96 | 92 |
| 2022 | 63 | 75 |
| 2023 | 66 | 63 |
| 2024 | 75 | 55 |
| 2025 | 47 | 54 |
| 2026 | 30 | 53 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power backoff techniques for modulation schemes29 Sep 2026US 12,750,786 B2QUALCOMM Incorproated
- Method for eliminating jamming by OAM mode quadratic coordination22 Sep 2026US 12,744,617 B2Xidian University
- Modem chip employing low complexity log likelihood ratio calculation and operating method thereof8 Sep 2026US 12,732,292 B2Samsung Electronics Co., Ltd.
- Mapping schemes for parity codes with shaping25 Aug 2026US 12,719,605 B2QUALCOMM Incorproated
- Method and device for transmitting/receiving wireless signal in communication system25 Aug 2026US 12,719,724 B2Electronics and Telecommunications Research Institute
- Transmitter and method for transmitting data block in wireless communication system8 Oct 2026US 2026/0312754 A1Electronics and Telecommunications Research Institute
- Probabilistic shaping for flexible spectrum integration8 Oct 2026US 2026/0312847 A1QUALCOMM Incorporated
- Approximations in distribution matching procedures8 Oct 2026US 2026/0312859 A1QUALCOMM Incorporated
- Constellation decomposition and compound bit-level and symbol-level probabilistic amplitude shaping1 Oct 2026US 2026/0303251 A1QUALCOMM Incorporated
- Bit-level energy-based probabilistic amplitude shaping1 Oct 2026US 2026/0303432 A1QUALCOMM Incorporated
Most cited
By later US patents
- Lower overhead method for data transmission using ATM and SCDMA over hybrid fiber coax cable plant683US 5,991,308 ATerayon Communication Systems, Inc. · 1999
- Computer-based multifunction personal communications system375US 5,452,289 AMulti-Tech Systems, Inc. · 1995
- Multi-channel trellis encoder/decoder278US 4,980,897 ATelebit Corporation · 1990
- Highly bandwidth efficient communications262US 6,359,923 B1AT&T Wireless Services, Inc. · 2002
- Data communication system and method therefor203US 6,005,897 A1999