Detection of wireless data jamming and spoofing
First Claim
Patent Images
1. An apparatus comprising:
- a receiver to receive a free-space electromagnetic carrier signal from a transmitter with at least one other receiver, signal power of the carrier signal being distributed over a region of coverage of the transmitter per a known spatial distribution;
an analyzer to compare an actual spatial distribution of the signal power of the carrier signal in the region of coverage with the known spatial distribution of the signal power of the carrier signal in the region of coverage as the receiver is transported along a trajectory therein independently of another trajectory along which the other receiver is transported, the actual spatial distribution being estimated from samples of the spatial distribution of the signal power, each of which comprising concurrent measurements of the signal power by the receiver and the other receiver, the actual spatial distribution of the signal power being continually re-estimated from additional samples of the spatial distribution of the signal power as the receiver and the other receiver are transported along the trajectory and the other trajectory, respectively; and
an interface to alert a user responsive to affirming that a difference between the actual and known spatial distributions of the signal power meets a criterion.
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Abstract
A set of global navigation satellite system receivers is deployed in and moves about a region that may be occupied by a signal jammer or spoofer. The receivers collect truth data from spectral content of the broadcast satellite signal and, optionally, from a set of sensors associated with each receiver from which an independent determination of location can be derived. The truth data are compared with data acquired by the receivers and an alert is issued upon detection of an anomaly. The data from receivers in a region of influence of the jammer or spoofer are aggregated, integrated, and correlated to generate a two-dimensional representation of a region in which the offending signals are present.
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Citations
24 Claims
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1. An apparatus comprising:
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a receiver to receive a free-space electromagnetic carrier signal from a transmitter with at least one other receiver, signal power of the carrier signal being distributed over a region of coverage of the transmitter per a known spatial distribution; an analyzer to compare an actual spatial distribution of the signal power of the carrier signal in the region of coverage with the known spatial distribution of the signal power of the carrier signal in the region of coverage as the receiver is transported along a trajectory therein independently of another trajectory along which the other receiver is transported, the actual spatial distribution being estimated from samples of the spatial distribution of the signal power, each of which comprising concurrent measurements of the signal power by the receiver and the other receiver, the actual spatial distribution of the signal power being continually re-estimated from additional samples of the spatial distribution of the signal power as the receiver and the other receiver are transported along the trajectory and the other trajectory, respectively; and an interface to alert a user responsive to affirming that a difference between the actual and known spatial distributions of the signal power meets a criterion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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establishing a region of coverage of a transmitter wherein a spatial distribution of at least one transmitted signal parameter is known to within a degree of statistical significance; transporting a receiver in the region of coverage to measure the transmitted signal parameter along a trajectory therein independently of another trajectory along which another receiver is transported; estimating an actual spatial distribution from samples of the spatial distribution of the signal parameter, each of which comprising concurrent measurements of the signal parameter by the receiver and the other receiver, the actual spatial distribution of the signal parameter being continually re-estimated from additional samples of the spatial distribution of the signal parameter as the receiver and the other receiver are transported along the trajectory and the other trajectory, respectively; determining whether the actual spatial distribution of the signal parameter is that of the known spatial distribution of the signal parameter to within the degree of statistical significance; and generating an alert responsive to affirming that the actual spatial distribution of the signal parameter is other than the known spatial distribution thereof. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A non-transitory computer readable medium encoded with software comprising processor-executable instructions that, when executed by a processor, cause the processor to perform functions of:
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establishing a region of coverage of a transmitter across which a spatial distribution of at least one transmitted signal parameter is known to within a degree of statistical significance; measuring the transmitted signal parameter by a receiver moving along a trajectory in the region of coverage independently of the trajectory along which another receiver is moving; estimating an actual spatial distribution from samples of the spatial distribution of the signal parameter, each of which comprising concurrent measurements of the signal parameter by the receiver and the other receiver, the actual spatial distribution of the signal parameter being continually re-estimated from additional samples of the spatial distribution of the signal parameter as the receiver and the other receiver are transported along the trajectory and the other trajectory, respectively; determining whether the actual spatial distribution of the signal parameter is that of the known distribution to within the degree of statistical significance; and generating an alert responsive to affirming that the actual spatial distribution of the signal parameter is other than the known spatial distribution thereof. - View Dependent Claims (24)
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Specification