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US 10,591,572 B2Granted
Estimating characteristics of objects in environment
AssigneeHenry S. Owen, LLC
InventorHenry S. Owen
Life of this patent
Estimating the term…
Abstract
Methods and systems disclosed herein may include receiving signals from a transmitter in a receiver; determine a bias of the transmitter and receiver; generating expected observations, based on the bias, corresponding to the received signals; and calculate a building height based on a power level of the received signals and a power level of the expected observations.
Claims15
A method comprising:
- receiving signals in a receiver, wherein the signals include electromagnetic waves having propagated from at least one transmitter through an atmosphere;
- recording corresponding observations associated with the received signals, wherein the observations include power levels of the corresponding received signal;
- determining expected observations of the signals corresponding to the recorded observations, wherein determining the expected observations includes determining the expected observations based on a propagation model of characteristics of the atmosphere;
- comparing the expected observations with the recorded observations;
- and
- estimating characteristics of the atmosphere based on the comparing of the expected observations with the recorded observations, wherein the estimated characteristics of the atmosphere indicate a speed that electromagnetic waves propagate through the atmosphere at a plurality of altitudes,
- wherein determining the expected observations includes determining the expected observations based on propagation models having different sets of refractivity conditions for the atmosphere,
- wherein comparing the expected observations with the recorded observations includes comparing the expected observations to the recorded observations to determine characteristics of vertical refractivity profiles in the atmosphere;
- estimating the characteristics associated with the expected observations;
- identifying the expected observations associated with identical characteristics;
- identifying characteristics with less influence on expected observations for removal;
- determining a bias associated with a transmitter-receiver pair associated with the recorded observations;
- and
- determining the expected observations based on the bias and the characteristics associated with the expected observations.
11 more elements
A method comprising:
- receiving signals in a receiver, wherein the signals include electromagnetic waves having propagated from at least one transmitter through an atmosphere;
- recording corresponding observations associated with the received signals, wherein the observations include power levels of the corresponding received signal;
- determining expected observations of the signals corresponding to the recorded observations, wherein determining the expected observations includes determining the expected observations based on a propagation model of characteristics of the atmosphere;
- comparing the expected observations with the recorded observations;
- and
- estimating characteristics of the atmosphere based on the comparing of the expected observations with the recorded observations, wherein the estimated characteristics of the atmosphere indicate a speed that electromagnetic waves propagate through the atmosphere at a plurality of altitudes,
- wherein estimating the characteristics of the atmosphere includes grouping characteristics of the atmosphere into a first cluster and a second cluster, first estimating the characteristics in the first cluster, and estimating characteristics in the second cluster based on the characteristics estimated in the first cluster.
4 more elements
A method comprising:
- receiving signals in a receiver, wherein the signals include electromagnetic waves having propagated from at least one transmitter through an atmosphere;
- recording corresponding observations associated with the received signals, wherein the observations include power levels of the corresponding received signal;
- determining expected observations of the signals corresponding to the recorded observations, wherein determining the expected observations includes determining the expected observations based on a propagation model of characteristics of the atmosphere;
- comparing the expected observations with the recorded observations;
- and
- estimating characteristics of the atmosphere based on the comparing of the expected observations with the recorded observations, wherein the estimated characteristics of the atmosphere indicate a speed that electromagnetic waves propagate through the atmosphere at a plurality of altitudes,
- wherein estimating the characteristics of the atmosphere includes estimating the characteristics based on a type of environment, wherein the type of environment includes an urban environment or a suburban environment.
4 more elements
A method comprising:
- receiving signals in a receiver, wherein the signals include electromagnetic waves having propagated from at least one transmitter through an atmosphere;
- recording corresponding observations associated with the received signals, wherein the observations include power levels of the corresponding received signal;
- determining expected observations of the signals corresponding to the recorded observations, wherein determining the expected observations includes determining the expected observations based on a propagation model of characteristics of the atmosphere;
- comparing the expected observations with the recorded observations;
- estimating characteristics of the atmosphere based on the comparing of the expected observations with the recorded observations, wherein the estimated characteristics of the atmosphere indicate a speed that electromagnetic waves propagate through the atmosphere at a plurality of altitudes;
- and
- calculating fit metrics or ambiguity metrics to characterize accuracy and uniqueness of a solution of the estimation of the characteristics.
4 more elements
A device comprising:
- a receiver to receive signals from at least one transmitter, wherein the signals include electromagnetic waves having propagated from at least one transmitter through an atmosphere;
- a memory to record observations associated with corresponding received signals, wherein the observations include power levels of corresponding signals;
- and
- a processor to:
- determine expected observations of the signals corresponding to the recorded observations, wherein determining the expected observations includes determining the expected observations based on a propagation model of characteristics of the atmosphere;
- compare the expected observations with the recorded observations;
- estimate characteristics of the atmosphere based on the comparison of the expected observations with the recorded observations, wherein the estimated characteristics of the atmosphere indicate a speed that electromagnetic waves propagate through the atmosphere at a plurality of altitudes,
- wherein the processor is configured to determine the expected observations based on propagation models having different sets of refractivity conditions for the atmosphere, and
- wherein the processor is configured to compare the expected observations to the recorded observations to determine characteristics of vertical refractivity profiles in the atmosphere;
- determine sensitivities of expected observations with respect to the characteristics;
- determine the characteristics with less influence on the expected observations;
- determine the expected observations based on the determination of the characteristics with less influence;
- estimate the characteristics associated with the expected observations;
- identify the expected observations associated with identical characteristics;
- identify characteristics with less influence on expected observations for removal;
- determine a bias associated with a transmitter-receiver pair associated with the recorded observations;
- and
- determine the expected observations based on the bias and the characteristics associated with the expected observations.
15 more elements
A device comprising:
- a receiver to receive signals from at least one transmitter, wherein the signals include electromagnetic waves having propagated from at least one transmitter through an atmosphere;
- a memory to record observations associated with corresponding received signals, wherein the observations include power levels of corresponding signals;
- and
- a processor to:
- determine expected observations of the signals corresponding to the recorded observations, wherein determining the expected observations includes determining the expected observations based on a propagation model of characteristics of the atmosphere;
- compare the expected observations with the recorded observations;
- estimate characteristics of the atmosphere based on the comparison of the expected observations with the recorded observations, wherein the estimated characteristics of the atmosphere indicate a speed that electromagnetic waves propagate through the atmosphere at a plurality of altitudes;
- select a plurality of sets of values for the characteristics associated with the expected observations;
- calculate the expected observations for each set of values for the transmitter-receiver pair based on the bias;
- calculate a difference between the expected observations for each set of values and the recorded observations;
- and
- determine the set of values with best fit to the recorded observations.
9 more elements
A device comprising:
- a receiver to receive signals from at least one transmitter, wherein the signals include electromagnetic waves having propagated from at least one transmitter through an atmosphere;
- a memory to record observations associated with corresponding received signals, wherein the observations include power levels of corresponding signals;
- and
- a processor to:
- determine expected observations of the signals corresponding to the recorded observations, wherein determining the expected observations includes determining the expected observations based on a propagation model of characteristics of the atmosphere;
- compare the expected observations with the recorded observations;
- and
- estimate characteristics of the atmosphere based on the comparison of the expected observations with the recorded observations, wherein the estimated characteristics of the atmosphere indicate a speed that electromagnetic waves propagate through the atmosphere at a plurality of altitudes,
- wherein the processor is configured to group characteristics of the atmosphere into a first cluster and a second cluster, first estimating the characteristics in the first cluster, and estimating characteristics in the second cluster based on the characteristics estimated in the first cluster.
6 more elements
Dependencies are inferred from the claim text.