H04L 25/0398
Restoration of channel reciprocity
Official title: {Restoration of channel reciprocity}
H04L25/0398 (Restoration of channel reciprocity) appears on 44 US grants and 46 published applications in this corpus.
Search patents in H04L- Granted patents
- 44
- Published applications
- 46
- Assignees
- 17
- Inventors
- 69
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 3 |
| 2010 | 0 | 0 |
| 2011 | 2 | 4 |
| 2012 | 0 | 2 |
| 2013 | 1 | 2 |
| 2014 | 3 | 4 |
| 2015 | 5 | 3 |
| 2016 | 6 | 6 |
| 2017 | 4 | 1 |
| 2018 | 6 | 9 |
| 2019 | 6 | 3 |
| 2020 | 5 | 2 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 2 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 2 |
| 2026 | 2 | 0 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Network assisted time reversal radio frequency sensing22 Sep 2026US 12,744,691 B2QUALCOMM Incorproated
- User equipment transmit/receive calibration in time division duplexing using assistance information18 Aug 2026US 12,712,702 B2QUALCOMM Incorporated
- Data recovery using gradients25 Feb 2025US 12,237,962 B2
- Over-the-air calibration for reciprocity based UL MIMO transmission18 Apr 2023US 11,632,152 B2QUALCOMM Incorporated
- Data recovery using subcarriers gradients28 Mar 2023US 11,616,678 B2
- Network assisted time reversal radio frequency sensing6 Mar 2025US 2025/0080381 A1QUALCOMM Incorporated
- User equipment transmit/receive calibration in time division duplexing using assistance information6 Feb 2025US 2025/0047460 A1QUALCOMM Incorporated
- Data Recovery using Gradients30 Nov 2023US 2023/0388171 A1
- Data Recovery using Subcarriers Gradients7 Jan 2021US 2021/0006447 A1
- Over-the-air calibration for reciprocity based ul mimo transmission5 Mar 2020US 2020/0076483 A1QUALCOMM Incorporated
Most cited
By later US patents
- Transmitter and receiver calibration for obtaining the channel reciprocity for time division duplex MIMO systems33US 8,891,598 B1Magnolia Broadband Inc. · 2014
- Sub-band feedback for beamforming on downlink multiple user MIMO configurations20US 9,252,991 B2Marvell World Trade Ltd. · 2016
- Method and apparatus for calibration and channel state feedback to support transmit beamforming in a MIMO system18US 7,920,533 B2InterDigital Technology Corporation · 2011
- Reciprocal channel sounding reference signal allocation and configuration13US 10,075,271 B2QUALCOMM Incorporated · 2018
- Inverse signal transformation13US 9,077,315 B22015