Radar sensing of vehicle occupancy
First Claim
1. A method for sensing occupancy status within an automotive vehicle using a radar sensor system, the radar sensor system comprising an antenna system, at least one sensor and processing circuitry, the method comprising:
- illuminating, using the antenna system, at least one occupiable position within the vehicle with continuous wave (CW) signals, the CW signals being frequency modulated in time;
receiving, using the at least one sensor, at least one sensor signal reflected as a result of the CW signals, the at least one sensor including a plurality of receive channels, each channel having a different frequency;
applying, using the processing circuitry, for each receive channel, DC offset removal to the corresponding sensor signal to generate a modified signal; and
generating, using the processing circuitry, based on the modified signals, one or more occupancy status signals, the occupancy status signal indicating a property related to said at least one occupiable position.
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Accused Products
Abstract
A method for sensing occupancy status within an automotive vehicle uses a radar sensor system, the radar sensor system includes an antenna system, at least one sensor and processing circuitry. The method comprises illuminating, using the antenna system, at least one occupiable position within the vehicle with continuous wave (CW signals), the CW signals being frequency modulated in time. At least one sensor signal (y(t,f1 . . . y(t,fn)) reflected as a result of the CW signals, is received using at least one sensor the at least one sensor defining a plurality of receive channels (1 . . . i), each channel having a different frequency (f1 . . . fi). Processing circuitry is operable for applying, for each receive channel (1 . . . i), DC offset removal to the corresponding sensor signal (y(t,f1 . . . y(t,fn)) to generate a modified signal (y′(t, f1) . . . y′(t,fn)); and generating, based on the modified signals (y′(t, f1) . . . y′(t,fn)) one or more occupancy status signals, the occupancy status signal indicating a property related to said at least one occupiable position.
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Citations
14 Claims
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1. A method for sensing occupancy status within an automotive vehicle using a radar sensor system, the radar sensor system comprising an antenna system, at least one sensor and processing circuitry, the method comprising:
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illuminating, using the antenna system, at least one occupiable position within the vehicle with continuous wave (CW) signals, the CW signals being frequency modulated in time; receiving, using the at least one sensor, at least one sensor signal reflected as a result of the CW signals, the at least one sensor including a plurality of receive channels, each channel having a different frequency; applying, using the processing circuitry, for each receive channel, DC offset removal to the corresponding sensor signal to generate a modified signal; and generating, using the processing circuitry, based on the modified signals, one or more occupancy status signals, the occupancy status signal indicating a property related to said at least one occupiable position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A programmable radar sensor system for sensing an occupancy status within an automotive vehicle, the radar sensor system comprising:
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an antenna system configured to illuminate at least one occupiable position within the vehicle with continuous wave (CW) signals, the CW signals being frequency modulated in time; at least one sensor configured to receive at least one sensor signal reflected as a result of the CW signals, the at least one sensor including a plurality of receive channels, each channel having a different frequency; and processing circuitry configured to; apply for each receive channel, DC offset removal to the corresponding sensor signal to generate a modified signal; and generate based on the modified signals, one or more occupancy status signals that indicate a property related to said at least one occupiable position.
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13. A radar sensor system for sensing occupancy status within an automotive vehicle, the system comprising:
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an antenna system, for illuminating at least one occupiable position within the vehicle with continuous wave (CW) signals, the CW signals being frequency modulated in time; at least one sensor for receiving at least one sensor signal reflected as a result of the CW signals, the at least one sensor including a plurality of receive channels, each channel having a different frequency; processing circuitry, coupled to the at least one sensor, the processing circuitry being configured to; apply, for each receive channel, DC offset removal to the corresponding sensor signal to generate a modified signal; and generate, based on the modified signals, one or more occupancy status signals, the occupancy status signal indicating a property related to said at least one occupiable position.
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14. A non-transitory computer readable medium having instructions stored thereon which, when executed, cause processing circuitry to:
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receive, using at least one sensor, at least one radar sensor signal reflected as a result of continuous wave signals from an antenna system configured to illuminate at least one occupiable position within a vehicle, the continuous wave signals being frequency modulated in time, wherein the at least one sensor includes a plurality of receive channels, each channel having a different frequency; apply, for each receive channel, a DC offset removal to the at least one radar sensor signal to generate a modified signal; and generate, based on the modified signals, one or more occupancy status signals that indicate a property related to said at least one occupiable position.
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Specification