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US 10,330,774 B2Granted
Method and apparatus for computationally efficient target acquisition and tracking using a radar
AssigneeGM Global Technology Operations LLC
InventorsOded Bialer, Igal Bilik, Alexander Pokrass
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Abstract
The present invention generally relates to processing of electromagnetic signals, and more specifically, for a method and apparatus for managing the computational cost of radar signal processing on a vehicular radar. The system is operative to utilize a Goerzel filter to aid in determining a frequency for a radar echo. In addition the system uses a DFT operation for tracking stationary objects and a FFT operation for tracing moving objects.
Claims18
A method comprising:
- receiving a first radar signal over a first time duration,
- performing a first fast Fourier transform on said radar signal over a first bandwidth to generate a first filtered radar signal;
- determining if the first filtered radar signal indicates a stationary object;
- receiving the radar signal over a second time duration;
- performing a discrete Fourier transform on said radar signal over the first bandwidth in response to the determination that the first filtered radar signal indicates a stationary object;
- and
- determining that the first filtered radar signal indicates a moving target and tracking the moving target using a shortened fast Fourier transform on the radar signal over the first bandwidth.
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An apparatus comprising:
- a transmitter for transmitting a pulsed radar signal,
- a receiver for receiving a radar signal over a first time duration and a second time duration wherein the radar signal is a reflection of the pulsed radar signal;
- a processor for performing a fast fourier transform on said radar signal over a first bandwidth to generate a first filtered radar signal, determining if the first filtered radar signal indicates a stationary objection and for performing a discrete fourier transform on said radar signal over the first bandwidth in response to the determination that the first filtered radar signal indicates a stationary object.
A method comprising:
- receiving a first radar signal over a first time duration covering a first field of view;
- processing the first radar signal using a fast Fourier transform;
- receiving a second radar signal over a second time duration over the first field of view;
- processing the second radar signal using a discrete Fourier transform;
- and
- determining that the first radar signal indicates a moving target and tracking the moving target using a shortened fast Fourier transform on the radar signal over the first bandwidth.
3 more elements
Dependencies are inferred from the claim text.