Self calibration of signal strength location system

Details Self calibration of signal strength location system Self calibration of signal strength location system

2006-06-20

2006-06-20

Le, Danh Cong (Department: 2683)

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

C455S067140, C455S522000, C455S069000, C342S450000, C342S458000

Reexamination Certificate

active

07065325

ABSTRACT:
A system for locating mobile units in a data communications system based on signal strength measurements of mobile unit transmissions is calibrated for variations in mobile unit transmitter power by determining range of a mobile unit from an access point using two way time ranging. The time ranging is compared to the value for range based on signal strength and a correction value for the mobile unit is updated based on the difference between range based on time ranging and the range based on signal strength.

REFERENCES:
patent: 6259912 (2001-07-01), Si
patent: 6754470 (2004-06-01), Hendrickson et al.
patent: 6947734 (2005-09-01), Toubassi
patent: 2003/0034851 (2003-02-01), Norman et al.
patent: 2003/0146871 (2003-08-01), Karr et al.
patent: 2004/0209574 (2004-10-01), Tsay et al.

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