Methods for monitoring channel sounding quality in WLAN devices
US8804559B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2011 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | May 25, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of monitoring channel-sounding quality for VHT WiFi devices is provided. A mobile station (the receiver) receives a sounding signal transmitted from an access point (the transmitter) over one or multiple sub-channels of a wide channel in a wireless network. The receiver performs channel estimation and determines an estimated channel response matrix. The receiver then calculates sounding quality for each valid sub-channel by computing an estimation error of the received sounding signal based on the estimated channel matrix. The receiver transmits a feedback message to the transmitter. The feedback message contains sounding quality information derived from the calculated channel sounding quality. If the channel sounding qualities for all valid sub-channels are poor, then a null VHT channel feedback frame is sent back to the transmitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.