System and method for multipath mitigation using clustered positioning signals
OwnerDavid Smallinventor
Life of this patent
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Abstract
A diversity system for positioning systems is disclosed, whereby a plurality of positioning signals, which are transmitted and/or are received from substantially the same location, are received and interpreted by an observing receiver. The observing receiver is configured to compare and then select substantially coherent positioning signals, and/or create a best-fit estimate of the measured positioning signals, such that accurate position measurements can be determined in multipath-affected environments.
Claims29
A method for mitigating multipath in a positioning system range measurement, the method comprising:
- a) transmitting a plurality of synchronous unique positioning signals from a plurality of antenna elements in known locations;
- b) receiving said plurality of synchronous unique positioning signals at an observing receiver;
- c) determining which of said plurality of synchronous unique positioning signals received in step b) exhibit substantially equal geometric ranges and unit vectors with respect to said observing receiver;
- d) interpreting signals determined in step c) to calculate optimal said range measurement.
A system for mitigating multipath in a positioning system range measurement, the system comprising:
- a) means for transmitting a plurality of synchronous unique positioning signals from a plurality of antenna elements in known locations;
- b) means for receiving said plurality of synchronous unique positioning signals at an observing receiver;
- c) means for determining which of said plurality of synchronous unique positioning signals received in step b) exhibit substantially equal geometric ranges and unit vectors with respect to said observing receiver;
- e) means for interpreting signals determined in step c) to calculate optimal said range measurement.
A method of mitigating multipath in an observing receiver position solution, the method comprising:
- a) transmitting a plurality of synchronous unique positioning signals from a plurality of antenna elements in known locations;
- b) receiving said plurality of synchronous unique positioning signals at said observing receiver;
- c) determining which of said plurality of synchronous unique positioning signals received in step b) exhibit substantially equal geometric ranges and unit vectors with respect to said observing receiver;
- d) interpreting signals determined in step c) to calculate optimal range measurements;
- e) processing said optimal range measurements to determine said position solution.
A method for mitigating multipath in a positioning system range measurement, the method comprising:
- a) transmitting a plurality of synchronous unique positioning signals from a plurality of transmit antenna elements in known locations;
- b) receiving said plurality of synchronous unique positioning signals at an observing receiver via a plurality of receive antenna elements which exhibit substantially equal geometric ranges and unit vectors with respect to said plurality of transmit antenna elements;
- c) interpreting signals received in step b) to calculate optimal said range measurement.
A method of mitigating multipath in an observing receiver position solution, the method comprising:
- a) transmitting a plurality of synchronous unique positioning signals from a plurality of transmit antenna elements in known locations;
- b) receiving said plurality of synchronous unique positioning signals at an observing receiver via a plurality of receive antenna elements which exhibit substantially equal geometric ranges and unit vectors with respect to said plurality of transmit antenna elements;
- c) interpreting signals received in step b) to calculate optimal said range measurement.
- d) processing said optimal range measurenents to determine said position solution.
Dependencies are inferred from the claim text.