Geolocating wireless emitters
First Claim
1. A method comprising:
- obtaining at least one pair of reference channel values, at least one pair of target channel values, and a set of geolocation data, wherein the at least one pair of reference channel values are determined using reference signals received from one or more reference emitter, and wherein the at least one pair of target channel values are determined using target signals received from a target emitter;
processing by a signal processing circuit the at least one pair of reference channel values, the at least one pair of target channel values, and the set of geolocation data to determine a phase-difference metric; and
,processing by the signal processing circuit the phase-difference metric to determine one or more sets of spatial location coordinates.
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Abstract
Provided herein are processes for locating wireless emitters. The processes provided may include use of an apparatus that includes a signal processing circuit configured to obtain a reference signal and a target signal, and process the reference signal and target signal to determine and output a reference channel value and a target channel value. The processes provided may also include use of an apparatus that includes a signal processing circuit configured to obtain a pair of reference channel values and a pair of target channel values, process the reference channel values and pair of target channel values to determine a phase-difference metric, and process the phase-difference metric to determine a set of spatial location coordinates. The set of spatial location coordinates may correspond to a location of a target emitter.
65 Citations
29 Claims
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1. A method comprising:
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obtaining at least one pair of reference channel values, at least one pair of target channel values, and a set of geolocation data, wherein the at least one pair of reference channel values are determined using reference signals received from one or more reference emitter, and wherein the at least one pair of target channel values are determined using target signals received from a target emitter; processing by a signal processing circuit the at least one pair of reference channel values, the at least one pair of target channel values, and the set of geolocation data to determine a phase-difference metric; and
,processing by the signal processing circuit the phase-difference metric to determine one or more sets of spatial location coordinates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus comprising a signal processing circuit, the signal processing circuit being configured to perform a method, the method comprising:
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obtaining, from an input communications interface, at least one pair of reference channel values, at least one pair of target channel values, and a set of geolocation data, wherein the at least one pair of reference channel values are determined using reference signals received from one or more reference emitter, and wherein the at least one pair of target channel values are determined using target signals received from a target emitter; processing the at least one pair of reference channel values, the at least one pair of target channel values, and the set of geolocation data to determine a phase-difference metric; and
,processing the phase-difference metric to determine one or more sets of spatial location coordinates. - View Dependent Claims (17, 18)
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19. An apparatus comprising:
- a signal processing circuit, the signal processing circuit being configured to;
obtain, from a radio-frequency receiver, at least one reference signal and a target signal;
process the target signal to determine a target channel value and the at least one reference signal to determine at least one reference channel value; and
output, to a radio-frequency transmitter, the target channel value and the at least one reference channel value. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
- a signal processing circuit, the signal processing circuit being configured to;
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27. A computer program product, comprising:
- one or more computer readable storage media readable by one or more processors for execution by the one or more processors to perform a method, the method comprising;
obtaining at least one pair of reference channel values, at least one pair of target channel values, and a set of geolocation data, wherein the at least one pair of reference channel values are determined using reference signals received from one or more reference emitter, and wherein the at least one pair of target channel values are determined using target signals received from a target emitter; processing the at least one pair of reference channel values, the at least one pair of target channel values, and the set of geolocation data to determine a phase-difference metric; and
,processing the phase-difference metric to determine one or more sets of spatial location coordinates.
- one or more computer readable storage media readable by one or more processors for execution by the one or more processors to perform a method, the method comprising;
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28. A system, comprising:
- at least one reference emitter capable of transmitting a reference signal, the at least one reference emitter having a known location;
a plurality of receiver nodes, the plurality of receiver nodes being operative to move, and the plurality of receiver nodes configured to receive the reference signal and from a target emitter a target signal, determine at least one pair of reference channel values and at least one pair of target channel values, and, a processing node, the processing node being configured to obtain the at least one pair of reference channel values and at least one pair of target channel values, and process the at least one pair of reference channel values and at least one pair of target channel values to determine spatial location coordinates, wherein the spatial location coordinates correspond to a location of the target emitter. - View Dependent Claims (29)
- at least one reference emitter capable of transmitting a reference signal, the at least one reference emitter having a known location;
Specification