AN IMPROVED GPS RECEIVER UTILIZING A COMMUNICATION LINK

摘要

The invention concerns a mobile GPS receiver comprising:
- a first antenna (613) for receiving GPS signals;
- a downconverter (614) coupled to said first antenna, said first antenna providing said GPS signals to said downconverter, said downconverter having an input for receiving a local oscillator signal to convert said GPS signals from a first frequency to a second frequency;
- a second antenna (601) for receiving a precision carrier frequency signal from a source providing said precision carrier frequency signal;
- an automatic frequency control (AFC) circuit (603) coupled to said second antenna, said AFC circuit being coupled to said downconverter to provide said local oscillator signal which is used to acquire said GPS signals.