H04L 25/0222
Estimation of channel variability
Official title: {Estimation of channel variability, e.g. coherence bandwidth, coherence time, fading frequency}
H04L25/0222 (Estimation of channel variability) appears on 498 US grants and 609 published applications in this corpus.
Search patents in H04L- Granted patents
- 498
- Published applications
- 609
- Assignees
- 182
- Inventors
- 1,140
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 3 |
| 2004 | 1 | 6 |
| 2005 | 2 | 10 |
| 2006 | 3 | 15 |
| 2007 | 3 | 9 |
| 2008 | 8 | 16 |
| 2009 | 10 | 26 |
| 2010 | 10 | 21 |
| 2011 | 19 | 32 |
| 2012 | 22 | 20 |
| 2013 | 19 | 23 |
| 2014 | 47 | 33 |
| 2015 | 33 | 33 |
| 2016 | 28 | 28 |
| 2017 | 26 | 22 |
| 2018 | 28 | 38 |
| 2019 | 31 | 30 |
| 2020 | 44 | 27 |
| 2021 | 24 | 22 |
| 2022 | 24 | 52 |
| 2023 | 25 | 43 |
| 2024 | 34 | 44 |
| 2025 | 35 | 40 |
| 2026 | 19 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wireless communication method for time-frequency domain synchronization, terminal device, and network device6 Oct 2026US 12,757,142 B2Guangdong Oppo Mobile Telecommunications Corp., Ltd.
- Tracking reference signals (TRSs) for joint communications and sensing29 Sep 2026US 12,750,255 B2QUALCOMM Incorporated
- Method and apparatus for evaluating performance of channel estimation in communication system25 Aug 2026US 12,719,722 B2Electronics and Telecommunications Research Institute
- Small delay cyclic delay diversity for data or control channels18 Aug 2026US 12,713,449 B2QUALCOMM Incorporated
- Method and arrangements for supporting serving of multiple wireless devices based on prediction of radio channel estimation accuracy degredation11 Aug 2026US 12,706,794 B2Telefonaktiebolaget LM Ericsson (publ)
- Methods for measuring and reporting doppler shift13 Aug 2026US 2026/0238257 A1QUALCOMM Incorporated
- Channel granularity for frequency modulated continuous waveform-based channel estimation6 Aug 2026US 2026/0230348 A1QUALCOMM Incorporated
- Differential channel characteristic value prediction report for user equipment (ue)-side beam prediction30 Jul 2026US 2026/0222248 A1QUALCOMM Incorporated
- Channel estimation for precoded transmissions30 Jul 2026US 2026/0222259 A1Telefonaktiebolaget LM Ericsson (publ)
- Methods, architectures, apparatuses and systems for incremental channel state information estimation16 Jul 2026US 2026/0205838 A1
Most cited
By later US patents
- Pilot-aided channel estimation for OFDM in wireless systems210US 6,654,429 B1AT&T Corp. · 2003
- Method and device for exploiting transmit diversity in time varying wireless communication systems147US 6,834,043 B1Motorola, Inc. · 2004
- Pilot-aided channel estimation for OFDM in wireless systems110US 7,292,651 B2AT&T Corp. · 2007
- Feedback to support restrictive reuse107US 7,548,752 B2QUALCOMM Incorporated · 2009
- Detecting signal modulation for motion detection103US 9,524,628 B1Cognitive Systems Corp. · 2016