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US 12,716,995 B2Granted
Integration of virtual channels from doppler division multiplex (DDM) FMCW radar signal
AssigneeInfineon Technologies AG
InventorsDyson Wilkes, David Addison, Markus Bichl
Life of this patent
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Abstract
Some aspects of the present disclosure relate to baseband processor for radar. The baseband processor includes a Doppler fast Fourier transform (FFT) circuit having an input and an output. An integration circuit has an input coupled to the output of the Doppler FFT circuit. A target detection circuit has an input coupled to an output of the integration circuit. The Doppler FFT circuit, the integration circuit, and the target detection circuit are each disposed on a silicon substrate, and the target detection circuit is arranged in series with the integration circuit and in series with the target detection circuit.
Claims16
A method for radar processing:
- receiving radar data;
- performing a fast Fourier transform (FFT) on the radar data to provide a stream of complex values such that a first set of Range-Doppler coordinate pairs is provided during a first time slice within the stream of complex values and a second set of Range-Doppler coordinate pairs is provided during the first time slice within the stream of complex values, the stream of complex values describing a plurality of receive antennae and a plurality of Range-Doppler coordinate pairs;
- determining a first power intensity for the first set of Range-Doppler coordinate pairs within the stream of complex values, each pair of the first set of Range-Doppler coordinate pairs sharing having a first Range value that is the same for all pairs of the first set and each pair of the first set having a first Doppler value that is the same for all pairs of the first set for each of the plurality of receive antennae;
- determining a second power intensity for the second set of Range-Doppler coordinate pairs provided during the first time slice within the stream of complex values, each pair of the second set of Range-Doppler coordinate pairs having the first Range value but each pair of the second set having a second Doppler value that is the same for all pairs of the second set for each of the plurality of receive antennae, the second Doppler value having a first Doppler offset relative to the first Doppler value;
- and
- summing the first power intensity and the second power intensity to provide a first resultant power intensity for the first Range value and the first Doppler value.
3 more elements
A radar system:
- a radio frequency (RF) receiver configured to receive radar data at a plurality of receive antennae;
- a fast Fourier transform (FFT) circuit coupled to the RF receiver, the FFT circuit configured to perform an FFT on the radar data to provide a stream of complex values such that a first plurality of Range-Doppler coordinate pairs provided during a first time slice within the stream of complex values each have a single first range value and a plurality of different Doppler values, respectively, and such that a second plurality of Range-Doppler coordinate pairs provided during a second time slice within the stream of complex values each have a single second range value and the different Doppler values, respectively, the single first Range value differing from the single second Range value and the stream of complex values including a plurality of Range-Doppler coordinate pairs that pertain to the plurality of receive antennae;
- a memory coupled to the FFT circuit, the memory configured to store the first plurality of Range-Doppler coordinate pairs and to store the second plurality of Range-Doppler coordinate pairs;
- and
- an integration block coupled to the memory, the integration block configured to select a first subset of multiple Range-Doppler coordinate pairs from the first plurality of Range-Doppler coordinate pairs, and sum the complex values of the first subset of the multiple Range-Doppler coordinate pairs to provide a first resultant power intensity for a first Range-Doppler pair of the first subset.
2 more elements
Dependencies are inferred from the claim text.