US 9,438,454 B1Granted

Alignment of multiple editions of a signal collected from multiple sensors

AssigneeThe Government of the United States, as represented by the Secretary of the Army

InventorWei Su

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Abstract

Various embodiments associated with synchronization of signal editions from multiple sensors are described. A plurality of sensors can be deployed in an environment. Different copies of a desired signal can be present in the environment and there can be a desire to identify this signal even if the signal is unknown (and a demodulation scheme of the desired signal is not known). The plurality of sensors can sense weak editions of the desired signal and transfer those signals to a master sensor or to a separate location, such as a fusion center. The weak editions may be asynchronous due to the editions being captured at different locations, different channels, different devices, etc. At the master sensor or separate location, the weak editions can be post-synchronized together and then fused together into a strong signal. From the strong signal, a demodulation scheme can be determined and the signal can be demodulated.

Claims20

Dependent claims

A system comprising:

a processor;
and
a non-transitory computer-readable medium communicatively coupled to the processor that stores components executable by the processor to facilitate operation of components, the components comprising:
a find component configured to find an alignment point between a first signal edition of a signal and a second signal edition of the signal;
an alignment component configured to use the alignment point to align the first signal edition and the second signal edition;
an identification component configured to identify a noise level of the first signal edition and configured to identify a noise level of the second signal edition;
an appointment component configured to make an appointment of a base signal edition from one of the first signal edition or the second signal edition,
where the first signal edition is different from the second signal edition,
where a first sensor collects the first signal edition,
where a second sensor collects the second signal edition,
where the first sensor and second sensor are different sensors,
where the alignment point is a point of greatest alignment between the first signal edition and the second signal edition,
where the find component is configured to find an alignment point between the base signal edition and a third signal edition,
where a third sensor collects the third signal edition, where the third signal edition is different from the first signal edition,
where the third signal edition is different from the second signal edition,
where the third sensor is a different sensor from the first sensor, and
where the third sensor is a different sensor from the second sensor.

14 more elements

A non-transitory computer-readable medium configured to store computer-executable instructions that when executed by a processor cause the processor to perform a method, the method comprising:

collecting a first signal edition of a signal from a first sensor;
collecting a second signal edition of the signal from a second sensor, where the first signal edition and the second signal edition are not synchronized with one another and a network of the signal is unknown;
collecting a third signal edition from a third sensor, where the third signal edition is not synchronized with the first signal edition, where the third signal edition is not synchronized with the second signal edition, where the third sensor not on a network of the first sensor, and where the third sensor is not on a network of the second sensor;
making a determination if the third signal should be excluded;
if the determination is to exclude the third signal edition:
synchronizing the first signal edition with the second signal edition;
and
identifying a constellation of the signal through use of the first signal edition and the second signal edition;
and
if the determination is not to exclude the third signal edition:
synchronizing the first signal edition, the second signal edition, and the third signal edition;
identifying the constellation of the signal through use of the first signal edition, the second signal edition, and the third signal edition;
matching the constellation of the signal with a constellation of a known signal;
establishing a modulation scheme associated with the known signal;
using the modulation scheme associated with the known signal to demodulate the signal;
and
causing the signal to be outputted after being demodulated.

14 more elements

A non-transitory computer-readable medium non-transitory computer-readable medium configured to store computer-executable instructions that when executed by a processor cause the processor to perform a method, the method comprising:

collecting a first signal edition of a signal from a first sensor;
collecting a second signal edition of the signal from a second sensor, where the first signal edition and the second signal edition are not synchronized with one another and a network of the signal is unknown;
making a determination if a sampling clock associated with the first sensor is synchronized with a sampling clock associated with the second sensor;
re-sampling the first signal edition in response to the determination being negative after synchronizing the first signal edition with the second signal edition;
re-sampling the second signal edition in response to the determination being negative after synchronizing the first signal edition with the second signal edition;
synchronizing the first signal edition after being re-sampled with the second signal edition after being re-sampled;
identifying a constellation of the signal through use of the first signal edition and the second signal edition;
matching the constellation of the signal with a constellation of a known signal;
establishing a modulation scheme associated with the known signal;
using the modulation scheme associated with the known signal to demodulate the signal;
and
causing the signal to be outputted after being demodulated.

9 more elements

Dependencies are inferred from the claim text.