ESTIMATION OF POSITION, SPEED AND BEARING USING TIME DIFFERENCE OF ARRIVAL AND RECEIVED SIGNAL STRENGTH IN A WLAN POSITIONING SYSTEM
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Oct 9, 2008
app pub date -
Apr 5, 2007
filing date -
Apr 5, 2007
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A method of estimating the speed of a WLAN-enabled device in a WLAN positioning system is provided. A method of estimating a speed of travel of a WLAN-enabled device includes the WLAN-enabled device receiving signals transmitted by a WLAN access point in range of the WLAN-enabled device. The signals include a first message and a second message. The method also includes estimating an expected time of arrival of the second message based on an actual arrival time of the first message and determining an actual time of arrival value of the second message. The method further includes determining a time difference of arrival value for the second message based on the actual time of arrival of the second message and the expected time of arrival of the second message and estimating the speed of travel of the WLAN-enabled device based on the time difference of arrival value.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully