H04L 27/2613
Structure of the reference signals
Official title: {Structure of the reference signals}
H04L27/2613 (Structure of the reference signals) appears on 5,005 US grants and 5,936 published applications in this corpus.
Search patents in H04L- Granted patents
- 5,005
- Published applications
- 5,936
- Assignees
- 567
- Inventors
- 4,334
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 10 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 2 |
| 2002 | 10 | 12 |
| 2003 | 9 | 26 |
| 2004 | 9 | 25 |
| 2005 | 16 | 81 |
| 2006 | 28 | 85 |
| 2007 | 35 | 111 |
| 2008 | 41 | 138 |
| 2009 | 50 | 179 |
| 2010 | 98 | 173 |
| 2011 | 123 | 174 |
| 2012 | 169 | 191 |
| 2013 | 205 | 206 |
| 2014 | 258 | 215 |
| 2015 | 237 | 271 |
| 2016 | 257 | 257 |
| 2017 | 264 | 324 |
| 2018 | 274 | 380 |
| 2019 | 379 | 476 |
| 2020 | 450 | 522 |
| 2021 | 429 | 437 |
| 2022 | 416 | 430 |
| 2023 | 372 | 389 |
| 2024 | 402 | 321 |
| 2025 | 315 | 302 |
| 2026 | 125 | 209 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Narrow bandwidth transmission schemes in next-generation enhanced long range WLAN6 Oct 2026US 12,756,608 B2Mediatek Inc.
- Method and apparatus for synchronization for Vehicle-to-X communication6 Oct 2026US 12,757,134 B2Innovative Technology Lab Co., Ltd.
- Method and apparatus for configuring reference signal channel characteristics, and communication device29 Sep 2026US 12,750,191 B2Zte Corporation
- Radio communication apparatus and radio communication method22 Sep 2026US 12,744,614 B2Panasonic Holdings Corporation
- Wireless communication method and apparatus22 Sep 2026US 12,744,632 B2Huawei Technologies Co., Ltd.
- Frequency hopping of reference signal8 Oct 2026US 2026/0312618 A1Nokia Technologies Oy
- Communication method and communication apparatus8 Oct 2026US 2026/0312852 A1Huawei Technologies Co., Ltd.
- Wireless transmission device, wireless reception device, transmission method, and reception method8 Oct 2026US 2026/0312853 A1Panasonic Intellectual Property Corporation of America
- Joint Communication and Sensing1 Oct 2026US 2026/0304078 A1
- Physical layer protocol data unit formats for 60ghz communications24 Sep 2026US 2026/0291796 A1QUALCOMM Incorporated
Most cited
By later US patents
- Method and apparatus for measuring reporting channel state information in a high efficiency, high performance communications system793US 6,473,467 B1QUALCOMM Incorporated · 2002
- Timing and frequency synchronization of OFDM signals425US 5,732,113 AStanford University · 1998
- Signal modulation method resistant to echo reflections and frequency offsets296US 9,083,595 B2Cohere Technologies, Inc. · 2015
- OFDM transmission/reception system and transmitting/receiving apparatus269US 5,694,389 AKabushiki Kaisha Toshiba · 1997
- Modified preamble structure for IEEE 802.11a extensions to allow for coexistence and interoperability between 802.11a devices and higher data rate, MIMO or otherwise extended devices252US 7,599,332 B2QUALCOMM Incorporated · 2009