Systems and methods for radio frequency calibration exploiting channel reciprocity in distributed input distributed output wireless communications
US-12166546-B2 · Dec 10, 2024 · US
Multi-user null data packet (MU-NDP) sounding within multiple user, multiple access, and/or MIMO wireless
US9048895B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9048895-B2 |
| Application number | US-95013910-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 19, 2010 |
| Priority date | Jun 5, 2009 |
| Publication date | Jun 2, 2015 |
| Grant date | Jun 2, 2015 |
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Abstract
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Multi-user null data packet (MU-NDP) sounding within multiple user, multiple access, and/or MIMO wireless communications. Within communication systems including multiple wireless communication devices (e.g., one or more APs, STAs, etc.), channel sounding of the selected communication links between the various wireless communication devices is performed. A MU-NDP announcement frame is transmitted to and received by various wireless communication devices indicating which of those wireless communication devices (e.g., one, some, or all) are being sounded. Then, respective NDP sounding frames are transmitted via the communication links corresponding to those wireless communication devices (e.g., one, some, or all) are being sounded, and sounding feedback signals are subsequently sent back to the original transmitting wireless communication device. In some instances, after transmission of the MU-NDP announcement frame, a clear to send (CTS) is sent from at least one of the wireless communication devices thereby precipitating the transmission of the NDP sounding frames.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for execution by a wireless communication device, the method comprising: transmitting a multi-user null data packet (MU-NDP) announcement frame to a plurality of wireless communication devices, wherein the MU-NDP announcement frame indicating which of the plurality of wireless communication devices being sounded, wherein the MU-NDP announcement frame includes a group definition field for use to interpret group identification fields (group IDs); af…
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Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US9048895B2 cover?
- Multi-user null data packet (MU-NDP) sounding within multiple user, multiple access, and/or MIMO wireless communications. Within communication systems including multiple wireless communication devices (e.g., one or more APs, STAs, etc.), channel sounding of the selected communication links between the various wireless communication devices is performed. A MU-NDP announcement frame is transmitte…
- Who is the assignee on this patent?
- Kim Joonsuk, Fischer Matthew James, Amini Peiman, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H04B7/0452. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 02 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).