H04L 27/2675
Pilot or known symbols
Official title: {Pilot or known symbols}
H04L27/2675 (Pilot or known symbols) appears on 1,561 US grants and 1,593 published applications in this corpus.
Search patents in H04L- Granted patents
- 1,561
- Published applications
- 1,593
- Assignees
- 495
- Inventors
- 2,856
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 11 | 0 |
| 1999 | 13 | 0 |
| 2000 | 19 | 0 |
| 2001 | 14 | 1 |
| 2002 | 16 | 20 |
| 2003 | 19 | 33 |
| 2004 | 17 | 54 |
| 2005 | 14 | 45 |
| 2006 | 38 | 61 |
| 2007 | 43 | 67 |
| 2008 | 38 | 107 |
| 2009 | 51 | 90 |
| 2010 | 75 | 85 |
| 2011 | 90 | 64 |
| 2012 | 110 | 61 |
| 2013 | 100 | 67 |
| 2014 | 93 | 58 |
| 2015 | 74 | 59 |
| 2016 | 68 | 58 |
| 2017 | 61 | 70 |
| 2018 | 60 | 73 |
| 2019 | 72 | 90 |
| 2020 | 88 | 83 |
| 2021 | 77 | 75 |
| 2022 | 71 | 79 |
| 2023 | 67 | 60 |
| 2024 | 58 | 58 |
| 2025 | 55 | 47 |
| 2026 | 32 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and apparatus for performing channel estimation for uplink data in NB-IoT physical layer18 Aug 2026US 12,712,764 B2Rakuten Symphony, Inc.
- Asynchronous non-orthogonal multiple access for ambient internet of things (AIoT) devices18 Aug 2026US 12,712,776 B2Lenovo (United States) Inc.
- Joint sensing and communications using OFDM waveforms11 Aug 2026US 12,704,587 B2Rutgers, The State University of Jersey
- Method and device for providing remote interference management reference signal, and storage medium11 Aug 2026US 12,706,714 B2Samsung Electronics Co., Ltd.
- Method and device for estimating time and frequency offsets in communication system4 Aug 2026US 12,701,578 B2Samsung Electronics Co., Ltd.
- Method of creating embedded components on an antenna substrate and antenna apparatus formed with same1 Oct 2026US 2026/0303425 A1ViaSat, Inc.
- Communication method and communication apparatus20 Aug 2026US 2026/0247487 A1Huawei Technologies Co., Ltd.
- Synchronization Raster for Less Than 5MHz of Dedicated Spectrum13 Aug 2026US 2026/0239238 A1Apple Inc.
- Cyclic Shift Method for Root Sequence and Apparatus6 Aug 2026US 2026/0230358 A1Huawei Technologies Co., Ltd.
- Method and apparatus for acquiring carrier phase measurement value, first device, and lmf entity30 Jul 2026US 2026/0223057 A1Datang Mobile Communications Equipment Co., Ltd.
Most cited
By later US patents
- Timing and frequency synchronization of OFDM signals425US 5,732,113 AStanford University · 1998
- System and method for distributed input distributed output wireless communications272US 7,599,420 B2Rearden, LLC · 2009
- OFDM transmission/reception system and transmitting/receiving apparatus269US 5,694,389 AKabushiki Kaisha Toshiba · 1997
- Method and apparatus for digital signal transmission using orthogonal frequency division multiplexing241US 5,406,551 ANippon Hoso Kyokai · 1995
- Multimode digital modem240US 6,055,268 ATexas Instruments Incorporated · 2000