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US 12,265,175 B2Granted
Processing radar signals
AssigneeInfineon Technologies AG
InventorsAndre Roger, Simon Achatz, Dian Tresna Nugraha, Ljudmil Anastasov, Markus Bichl, Mayeul Jeannin, Maximilian Eschbaumer
Life of this patent
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Abstract
It is suggested to process radar signals including: (i) receiving reception signals via at least one antenna of a first receiving circuit; (ii) determining an interim result by processing the reception signals via a frequency transformation; (iii) determining an error compensation vector based on the interim result and an expected characteristic; and (iv) applying the error compensation vector on other reception signals that have been processed via the frequency transformation.
Claims14
A radar system comprising:
- a first antenna sub-array configured to receive a first plurality of antenna signals;
- a second antenna sub-array configured to receive a second plurality of antenna signals;
- a first signal processing circuit configured to receive the first plurality of antenna signals from the first antenna sub-array and perform processing thereon to form a first digitized antenna data set;
- a second signal processing circuit configured to receive the second plurality of antenna signals from the second antenna sub-array and perform processing thereon to form a second digitized antenna data set;
- a fast fourier transform (FFT) stage, comprising:
- a first, first stage FFT device configured to receive the first digitized antenna data set and output first preliminary processed digitized antenna data;
- a second, first stage FFT device configured to receive the second digitized antenna data set and output second preliminary processed digitized antenna data;
- and
- a second stage FFT device configured to receive the first and second preliminary processed digitized antenna data and output FFT processed antenna data that comprises an interim result, and wherein the FFT processed antenna data contain phase errors therein due to phase errors between the first signal processing circuit and the second signal processing circuit, wherein the output FFT processed antenna data comprise a range/Doppler map for each of a plurality of virtual antennas, and wherein each range/Doppler map comprises FFT peaks;
- an electronic control circuit configured to calculate an error compensation vector using the FFT processed antenna data and an expected characteristic in the calculating, wherein the expected characteristic is determined based on remote data or an intrinsic signal characteristic of at least one of the first and second received signals in one or several of a dimensions angle, range and Doppler range, and wherein the electronic control circuit is configured to apply the calculated error compensation vector to the FFT processed antenna data to generate compensated FFT processed antenna data,
- wherein the electronic control circuit is further configured to select one or more FFT peaks from the compensated FFT processed antenna data.
8 more elements
A radar system comprising a first radar device and a second radar device, wherein the first radar device comprises:
- a first antenna sub-array configured to receive a first plurality of antenna signals;
- a second antenna sub-array configured to receive a second plurality of antenna signals;
- a first signal processing circuit configured to receive the first plurality of antenna signals from the first antenna sub-array and perform processing thereon to form a first digitized antenna data set;
- a second signal processing circuit configured to receive the second plurality of antenna signals from the second antenna sub-array and perform processing thereon to form a second digitized antenna data set;
- a fast fourier transform (FFT) stage, comprising:
- a first, first stage FFT device configured to receive the first digitized antenna data set and output first preliminary processed digitized antenna data;
- a second, first stage FFT device configured to receive the second digitized antenna data set and output second preliminary processed digitized antenna data;
- and
- a second stage FFT device configured to receive the first and second preliminary processed digitized antenna data and output FFT processed antenna data that contain phase errors therein due to phase errors between the first signal processing circuit and the second signal processing circuit, wherein the output FFT processed antenna data comprise a range/Doppler map for each of a plurality of virtual antennas, and wherein each range/Doppler map comprises FFT peaks;
- wherein the FFT processed antenna data comprises an interim result, and wherein the first radar device is configured to transfer the interim result to the second radar device:
- wherein the second radar device comprises an electronic control circuit configured to calculate an error compensation vector using the FFT processed antenna data from the first radar device, and provide the calculated error compensation vector to the first radar device,
- wherein the electronic control circuit is configured to calculate the error compensation vector using both the interim result and an expected characteristic in the calculating, wherein the expected characteristic is determined based on remote data or an intrinsic signal characteristic of at least one of the reception signals in one or several of a dimensions angle, range and Doppler range;
- wherein the first radar device is further configured to apply the calculated error compensation vector to the FFT processed antenna data to generate compensated FFT processed antenna data, and
- wherein the first radar device is further configured to select one or more FFT peaks from the compensated FFT processed antenna data.
11 more elements
Dependencies are inferred from the claim text.