Multipath propagation detection and avoidance method and system
First Claim
1. A multipath error detection system comprising:
- first and second spaced antennas for receiving a carrier signal from a moving radiation source and producing a carrier phase difference representative of the location of the source;
means, responsive to said carrier phase difference and to a predetermined phase difference for the source in that location, for generating a difference signal; and
means, responsive to said difference signal, for determining the presence of a multipath error signal.
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Accused Products
Abstract
Multipath propagation detection can be accomplished using first and second spaced antennas which receive a carrier signal from a moving radiation source and produce a carrier phase difference representative of the location of the source; a difference signal representative of the difference between the measured carrier phase difference and a predetermined phase difference for the source in that location is generated; and the presence of multipath distortion in that difference signal is determined. Furthermore, when a multiplicity of source signals are tracked as in reception of navigation signals from the Global Positioning Satellite System, the receiver may be programmed to eliminate or suppress errors arising from measurements that have been distorted by multipath propagation.
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Citations
11 Claims
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1. A multipath error detection system comprising:
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first and second spaced antennas for receiving a carrier signal from a moving radiation source and producing a carrier phase difference representative of the location of the source;
means, responsive to said carrier phase difference and to a predetermined phase difference for the source in that location, for generating a difference signal; and
means, responsive to said difference signal, for determining the presence of a multipath error signal. - View Dependent Claims (2, 3, 4, 5)
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6. A multipath error detection method comprising:
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receiving at first and second spaced antennas a carrier signal from a moving radiation source and producing a carrier phase difference representative of the location of the source;
generating a difference signal representative of a difference between the carrier phase difference and a predetermined phase difference for the source in that location; and
determining the presence of a multipath error signal in the difference signal. - View Dependent Claims (7, 8, 9, 10)
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11. A multipath error detection system comprising:
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first and second spaced antennas for receiving a carrier signal from a moving radiation source and producing a carrier phase difference representative of the location of the source; and
a processor programmed to;
generate a difference signal based on said carrier phase difference and a predetermined phase difference for the source in that location;
determine the presence of a multipath error signal based on the difference signal; and
remove the multipath error signal.
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Specification