REBROADCASTING METHOD AND SYSTEM FOR NAVIGATION SIGNALS
First Claim
Patent Images
1. A method for receiving rebroadcast ranging signals, the method comprising:
- (a) receiving a spread spectrum ranging signal;
(b) despreading the spread spectrum ranging signal as a function of a first spreading code;
(c) despreading a despread ranging signal output of (b) as a function of a second spreading code; and
(d) determining a range as a function of an output of (c).
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Abstract
A “synchrolite” or rebroadcasting device allows GPS or GNSS navigation signals received at one or several locations to be processed at a separate location. The signals received by the synchrolite are added to a pilot tone and then encoded with a superimposed spread-spectrum code before being rebroadcast. The superimposed code allows signals from different synchrolites to be distinguished during the navigation process.
56 Citations
10 Claims
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1. A method for receiving rebroadcast ranging signals, the method comprising:
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(a) receiving a spread spectrum ranging signal; (b) despreading the spread spectrum ranging signal as a function of a first spreading code; (c) despreading a despread ranging signal output of (b) as a function of a second spreading code; and (d) determining a range as a function of an output of (c). - View Dependent Claims (2, 3, 9, 10)
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4. A system for receiving rebroadcast ranging signals, the system comprising:
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a receive antenna; a first despreading demodulator connected with the receive antenna, the first despreading demodulator responsive to a first spreading code; a ranging signal receiver connected with an output of the first despreading demodulator for receiving a despread ranging signals despread with the first spreading code, the ranging signal receiver operable to despread the despread ranging signal from the output and determine a range. - View Dependent Claims (5, 6, 7, 8)
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Specification