Methods and systems for mitigating multipath propagation
AssigneeSRC, Inc.
InventorsJohn C. Dougherty, Gregory A. Mesagna
Life of this patent
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Abstract
A system and method for mitigating multipath propagation are disclosed herein. The method may include collecting a plurality of detections of a target, forming a plurality of models each assuming at least one parameter causing multipath propagation, determining which model best fits the detections of the target, using the best fit model to approximate the ground conditions, and using the approximated ground conditions to remove the multipath error from the observed signals.
Claims20
A system for mitigating multipath errors, comprising:
- an antenna configured to receive a plurality of radar detections of a target, wherein the radar detections have embedded multipath errors;
- and
- a computing device configured to at least partially cancel the embedded multipath errors, comprising:
- a multipath simulation module configured to generate at least one simulated multipath-embedded candidate signal from the plurality of radar detections and from at least one assumed ground condition;
- and
- a signal correction module configured to subtract the at least one simulated multipath-embedded candidate signal from at least one of the plurality of radar detections to at least partially cancel the embedded multipath errors.
A computer program product encoded in a non-transitory computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to perform an algorithm comprising the steps of:
- receiving a plurality of radar signals having embedded multipath errors;
- determining from the plurality of radar signals a plurality of detections of a target;
- modeling at least one direct flight path of the target, according to the plurality of detections;
- modeling at least one ground condition;
- modeling a direct flight path signal from the modeled direct flight path and a multipath signal from the modeled ground condition;
- combining the at least one modeled direct flight path signal and the at least one multipath signal to form at least one candidate combined signal;
- subtracting the at least one candidate combined signal from at least one of the plurality of detections to at least partially cancel the embedded multipath errors.
Dependencies are inferred from the claim text.