Frequency Offset Estimation for Gps Enabled Wi-Fi Access Points
Tausif Ezaj Khan
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Frequency Offset Estimation for Gps Enabled Wi-Fi Access Points

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A method to estimate the frequency offset between the internal oscillators of two or more GPS RF front-ends is described and evaluated. The objective is to allow a Non-Line-of-Sight (NLOS) GPS receiver to acquire and track satellite signals with assistance data provided by a Line-of-Sight (LOS) GPS receiver. This facilitates indoor positioning with GPS, which is used to accurately position 802.11 WLAN access points that will be used in an integrated indoor positioning system. The assistance data consists of the Doppler frequency and code phase of GPS satellites that the LOS GPS receiver can cl...