H04L 25/021
Estimation of channel covariance
Official title: {Estimation of channel covariance}
H04L25/021 (Estimation of channel covariance) appears on 280 US grants and 314 published applications in this corpus.
Search patents in H04L- Granted patents
- 280
- Published applications
- 314
- Assignees
- 104
- Inventors
- 644
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 2 |
| 2003 | 1 | 6 |
| 2004 | 4 | 10 |
| 2005 | 4 | 6 |
| 2006 | 5 | 7 |
| 2007 | 6 | 7 |
| 2008 | 6 | 4 |
| 2009 | 6 | 11 |
| 2010 | 6 | 7 |
| 2011 | 7 | 9 |
| 2012 | 8 | 7 |
| 2013 | 9 | 8 |
| 2014 | 13 | 13 |
| 2015 | 14 | 16 |
| 2016 | 14 | 18 |
| 2017 | 20 | 14 |
| 2018 | 9 | 16 |
| 2019 | 15 | 10 |
| 2020 | 17 | 15 |
| 2021 | 15 | 15 |
| 2022 | 12 | 34 |
| 2023 | 22 | 28 |
| 2024 | 23 | 19 |
| 2025 | 21 | 22 |
| 2026 | 10 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Time domain basis reporting for channel state information29 Sep 2026US 12,750,112 B2QUALCOMM Incorporated
- Estimation method of discrete digital signals in noisy overloaded wireless communication systems with CSI errors25 Aug 2026US 12,719,591 B2AUMOVIO Germany GmbH
- Method for transmission of downlink radio signals in a D-MIMO system and a D-MIMO system18 Aug 2026US 12,712,598 B2Telefonaktiebolaget LM Ericsson (publ)
- User scheduling method in multi-antenna signal transmission, and electronic device and storage medium23 Jun 2026US 12,665,635 B2Zte Corporation
- Techniques for transformation of analog beamforming codebooks19 May 2026US 12,633,989 B2QUALCOMM Incorporated
- Codeblock (cb) sorting and acknowledgement (ack) report compression1 Oct 2026US 2026/0304180 A1QUALCOMM Incorporated
- High performance pilot assignment for massive multiple input multiple output networks23 Jul 2026US 2026/0213980 A1Nokia Solutions and Networks Oy
- Configurations for data-carrying reference signals18 Jun 2026US 2026/0172171 A1QUALCOMM Incorporated
- Apparatus and method for a wireless communication system11 Jun 2026US 2026/0163761 A1Nokia Solutions and Networks Oy
- Electronic device and operating method thereof23 Apr 2026US 2026/0113216 A1Samsung Electronics Co., Ltd.
Most cited
By later US patents
- Spatio-temporal processing for communication580US 6,144,711 ACisco Systems, Inc. · 2000
- Cellular/satellite communications system with improved frequency re-use360US 5,555,257 AEricsson GE Mobile Communications Inc. · 1996
- Spatio-temporal processing for interference handling318US 6,452,981 B1Cisco Systems, Inc. · 2002
- Method and apparatus for utilizing channel state information in a wireless communication system316US 6,771,706 B2QUALCOMM Incorporated · 2004
- Method and apparatus for closed loop data transmission295US 7,139,328 B2Motorola, Inc. · 2006