Integrity monitoring in a position location system utilizing knowledge of local topography
AssigneeQUALCOMM Incorporated
InventorPeter Gaal
Life of this patent
Estimating the term…
Abstract
A system for and method of deriving a position estimate of a receiver from a plurality of parameter measurements is provided. Each measurement is derived from a correlation function, which in turn is derived by correlating a signal received at the receiver with an identification code uniquely identifying a transmitter visible to the receiver. A plurality of position estimates are derived, each from a different subset of the plurality of measurements. Based on local topography, one of the position estimates is selected as the best estimate of the position of the receiver.
Claims19
A method of deriving a position estimate of a receiver from a plurality of parameter measurements, each derived from a correlation function which in turn is derived by correlating a signal received at the receiver with an identification code uniquely identifying a transmitter visible to the receiver, comprising:
- deriving a plurality of position estimates, each from a different subset of the plurality of parameter measurements;
- and
- selecting, based on local topography, one of the plurality of position estimates.
A method of deriving a position estimate of a receiver from a plurality of parameter measurements, each derived from a correlation function which in turn is derived by correlating a signal received at the receiver with an identification code uniquely identifying a transmitter visible to the receiver, comprising:
- a step for deriving a plurality of position estimates, each from a different subset of the plurality of parameter measurements;
- and
- a step for selecting, based on local topography, one of the plurality of position estimates.
A system for deriving a position estimate of a receiver from a plurality of parameter measurements, each derived from a correlation function which in turn is derived by correlating a signal received at the receiver with an identification code uniquely identifying a transmitter visible to the receiver, comprising:
- first logic for deriving a plurality of position estimates, each from a different subset of measurements;
- and
- second logic for selecting, based on local topography, one of the plurality of position estimates.
A system for deriving a position estimate of a receiver from a plurality of parameter measurements, each derived from a correlation function which in turn is derived by correlating a signal received at the receiver with an identification code uniquely identifying a transmitter visible to the receiver, comprising:
- means for deriving a plurality of position estimates, each from a different subset of the plurality of parameter measurements;
- and
- means for selecting, based on local topography, one of the plurality of position estimates.
A system for deriving a position estimate of a receiver from a plurality of parameter measurements comprising:
- a correlator for correlating a signal received at the receiver with an identification code uniquely identifying a transmitter visible to the receiver;
- a memory for storing a plurality of position estimates;
- and
- a central processing unit for:
- deriving the plurality of position estimates, each from a different subset of the plurality of parameter measurements;
- and
- selecting, based on local topography, one of the plurality of position estimates.
A non-transient, computer-readable storage medium comprising program code, which, when executed by a processor, causes the processor to:
- derive a plurality of position estimates of a receiver, each from a different subset of a plurality of parameter measurements:
- wherein each of the plurality of parameter measurements is derived from a correlation function;
- and
- wherein each correlation function is derived by correlating a signal received at the receiver with an identification code uniquely identifying a transmitter visible to the receiver;
- and
- select, based on local topography, one of the plurality of position estimates.
Dependencies are inferred from the claim text.