Differential phase measurement through antenna multiplexing
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United States of America Patent
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Dec 7, 1993
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N/A
app pub date -
Oct 6, 1992
filing date -
Oct 6, 1992
priority date (Note) -
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Abstract
An embodiment of the present invention is a system for time multiplexing a carrier signal received by two or more GPS antennas through a single hardware path, using a single receiver's oscillator in that hardware path as a reference to compare the phase from each antenna. One of the antennas is designated as a reference antenna and a carrier signal received by it is used to phase lock in numerically controlled oscillator. The same carrier signal received by the other antennas is periodically compared in phase to the output of the numerically controlled oscillator. Each comparison results in a phase angle measurement for the respective antennas compared to the master antenna.
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