EXCESS DELAY ESTIMATION USING TOTAL RECEIVED POWER
To determine the position of a mobile device located within a coverage area of a base station, the time of arrival (TOA) of the CDMA signal received by the mobile device from the base station is reduced in proportion to the received power of the CDMA signal. The mobile device uses the reduced TOA of...
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Main Author | |
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Format | Patent |
Language | English French German |
Published |
15.06.2011
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Subjects | |
Online Access | Get full text |
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Summary: | To determine the position of a mobile device located within a coverage area of a base station, the time of arrival (TOA) of the CDMA signal received by the mobile device from the base station is reduced in proportion to the received power of the CDMA signal. The mobile device uses the reduced TOA of the CDMA signals together with the received GPS signals to detect its position. Alternatively, the mobile device transmits the TOA and power measurements of the received CDMA signals to a position determination entity (PDE). The PDE biases the TOA to estimate the position of the mobile device and transmits assistance data to the mobile device, thereby enabling the mobile device to receive GPS signals. The received GPS signals alone, or in combination with the biased TOA are then used to recompute the position of the mobile device. |
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Bibliography: | Application Number: EP20040813741 |