MOVING-ENTITY DETECTION
First Claim
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1. A method of sensing moving entities, the method comprising:
- transmitting a stepped-frequency radar signal including a plurality of frequencies, at least a portion of the transmitted radar signal moving through a wall from a first side of the wall to a second side of the wall;
receiving reflected portions of the radar signal with a first antenna arranged to receive reflected radar signals at a first location and a second antenna arranged to receive reflected radar signals at a second location;
processing the reflected portions received from the first and second antennas to generate processed data including information associated with frequency shifts between the transmitted signal and the reflected portions of the radar signal received at the first location and information associated with frequency shifts between the transmitted signal and the reflected portions of the radar signal received at the second location; and
analyzing the processed data to determine if reflected portions of the radar signal are associated with moving entities located beyond the second side of the wall.
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Abstract
Sensing moving entities includes transmitting a stepped-frequency radar signal including multiple frequencies through a wall from a first side of the wall to a second side of the wall. Portions of the radar signal that are reflected by entities located beyond the second side of the wall are detected. The reflected portions are processed to generate processed data including information associated with frequency shifts between the transmitted signal and the detected signal. The processed data is analyzed to determine if reflected portions are associated with moving entities.
42 Citations
26 Claims
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1. A method of sensing moving entities, the method comprising:
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transmitting a stepped-frequency radar signal including a plurality of frequencies, at least a portion of the transmitted radar signal moving through a wall from a first side of the wall to a second side of the wall; receiving reflected portions of the radar signal with a first antenna arranged to receive reflected radar signals at a first location and a second antenna arranged to receive reflected radar signals at a second location; processing the reflected portions received from the first and second antennas to generate processed data including information associated with frequency shifts between the transmitted signal and the reflected portions of the radar signal received at the first location and information associated with frequency shifts between the transmitted signal and the reflected portions of the radar signal received at the second location; and analyzing the processed data to determine if reflected portions of the radar signal are associated with moving entities located beyond the second side of the wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for sensing moving entities, the system comprising:
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a stepped-frequency radar transmitter configured to transmit a stepped-frequency radar signal; a first antenna arranged to receive reflected radar signals at a first location; a second antenna arranged to receive reflected radar signals at a second location; and a processor configured to; process the reflected portions received from the first and second antennas to generate processed data including information associated with frequency shifts between the transmitted signal and the reflected portions of the radar signal received at the first location and information associated with frequency shifts between the transmitted signal and the reflected portions of the radar signal received at the second location, and analyze the processed data to determine if reflected portions of the radar signal are associated with moving entities located beyond a far side of a wall. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification