Moving-entity detection

A computer-implemented method comprising:

• generating a representation of a space that comprises a barrier that defines an interior region and an object in the interior region, the generated representation being based on a known location and orientation of the barrier relative to the object;
• determining, using the generated representation, a modeled parameter that defines reflections by the object of a radar signal that propagates through the barrier and into the interior region and irradiates at least a portion of the barrier and at least a portion of the object;
• accessing a parameter of a candidate detection of the object;
• comparing the modeled parameter that defines the reflections by the object of the radar signal to the accessed parameter of the candidate detection;
• and
• classifying the candidate detection as an actual detection or a false alarm based on the comparison.

A device comprising:

• a transceiver configured to receive and transmit multiple radar signals, each radar signal associated with a frequency, through a barrier and into an interior region defined by the barrier;
• a processor coupled to an electronic storage, the electronic storage storing instructions that, when executed, cause the processor to perform operations comprising:
• generating a representation of a space that comprises the barrier and an object in the interior region defined by the barrier, the generated representation being based on a known location and orientation of the barrier relative to the object;
• determining, using the generated representation, a modeled parameter that defines reflections by the object of a radar signal that propagates through the barrier and into the interior region and irradiates at least a portion of the barrier and at least a portion of the object;
• accessing a parameter of a candidate detection of the object;
• comparing the modeled parameter that defines the reflections by the object of the radar signal to the accessed parameter of the candidate detection;
• and
• classifying the candidate detection as an actual detection or a false alarm based on the comparison.

A computer-implemented method comprising:

• transmitting a first stepped-frequency radar signal through a barrier, wherein a transmitter of the stepped-frequency radar is on a first side of the barrier;
• sensing a first signal comprising a reflection of the first transmitted signal from an object;
• analyzing the first sensed signal to identify a first detection of the object;
• transmitting a second stepped-frequency radar signal through the barrier;
• sensing a second signal comprising a reflection of the second transmitted signal from an object located on a second side of the barrier;
• analyzing the second sensed signal to identify a second detection of the object;
• forming a track representative of a motion of the object through a region defined by a boundary based on the first detection and the second detection;
• transmitting a third stepped-frequency radar signal through the barrier;
• sensing a third signal from the region;
• analyzing the third signal to identify a candidate detection;
• comparing a parameter of the candidate detection to a parameter of at least one of the first and second detections;
• determining, based on the comparison, whether the candidate detection is a false alarm or an actual detection;
• and
• if the candidate detection is a false alarm, presenting the first and second detections without the candidate detection, and if the candidate detection is an actual detection, presenting the first and second detections with the candidate detection.