| 摘要 |
A shared channel GPS (Global Positioning System) receiver for receiving a plurality of coded satellite signals. The plurality of satellite signals is transmitted by a corresponding plurality of satellites. Since these satellites are moving rapidly with respect to the receiver, Doppler shifting of the signals is exhibited. The signals are converted from analog to digital at intermediate frequency levels. The signals are then separated simultaneously into a plurality of digital signals corresponding to channel information for each transmitting satellite. One channel of the receiver sequence through a number of the satellites on a time division multiplexed basis. The channel estimates a plurality of parameter pertaining to each satellite so that re-acquisition of the satellite's transmission may be facilitated. A processor then converts these channel information signals to pseudo-range and broadcast data for navigation and time purposes.
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