Adaptive correction of radar channel-to-channel time-dependent errors
Aspects of the disclosure are directed to adaptive correction of radar channel-to-channel time-dependent errors. In accordance with one aspect, the adaptive correction of radar channel-to-channel time-dependent errors includes transforming a digitized data flow to generate a transformed data flow; detecting the transformed data flow to generate a detected data flow; focusing the detected data flow to generate a focused data flow; and aligning the focused data flow to generate a corrected data flow. In one aspect, it may further include performing a direction of arrival (DOA) processing on the corrected data flow to generate a resolved data set, processing the resolved data set to generate a post-processed data set, radiating a transmit radar waveform, capturing a receive radar waveform related to the transmit radar waveform and generating the digitized data flow based on the receive radar waveform.
1. A method for adaptive correction of radar channel-to-channel time-dependent errors, the method comprising:
transforming a digitized data flow to generate a transformed data flow;
detecting the transformed data flow to generate a detected data flow;
reformatting the detected data flow for autofocusing;
focusing the detected data flow to generate a focused data flow; and
aligning the focused data flow to generate a corrected data flow.
2. The method of claim 1 , further comprising performing a direction of arrival (DOA) processing on the corrected data flow to generate a resolved data set.
3. The method of claim 2 , further comprising processing the resolved data set to generate a post-processed data set.
4. The method of claim 3 , further comprising radiating a transmit radar waveform using one or more transmit antenna elements.
5. The method of claim 4 , further comprising capturing a receive radar waveform related to the transmit radar waveform using one or more receive antenna elements.
6. The method of claim 5 , further comprising generating the digitized data flow based on the receive radar waveform.
7. The method of claim 5 , wherein the receive radar waveform includes a scaled replica of the transmit radar waveform with a time delay τ (tau) and a Doppler shift ν (nu) for an object of interest.
8. The method of claim 4 , further comprising converting the transmit radar waveform into transmitted electromagnetic energy.
9. The method of claim 8 , further comprising using one or more transmit elements for converting the transmit radar waveform.
10. The method of claim 1 , wherein the aligning the focused data flow comprises correcting one or more phase or amplitude of the focused data flow.
11. The method of claim 10 , further comprising using a complex scaling of the focused data flow.
12. The method of claim 11 , wherein the complex scaling includes in-phase and quadrature components of the focused data flow.
13. The method of claim 11 , wherein the complex scaling includes magnitude and phase components of the focused data flow.
14. An apparatus for adaptive correction of radar channel-to-channel time-dependent errors, the apparatus comprising:
a range/Doppler transformer to transform a digitized data flow to generate a transformed data flow;
a detection processor, coupled to the range/Doppler transformer, to detect the transformed data flow to generate a detected data flow;
an autofocus processor, coupled to the detection processor, to focus the detected data flow to generate a focused data flow; and
a channel alignment processor, coupled to the autofocus processor, to align the focused data flow to generate a corrected data flow.
15. The apparatus of claim 14 , further comprising a direction of arrival (DOA) processor, coupled to the channel alignment processor, to perform a direction of arrival (DOA) processing on the corrected data flow to generate a resolved data set.
16. The apparatus of claim 15 , further comprising a post-processor, coupled to the DOA processor, to process the resolved data set to generate a post-processed data set.
17. The apparatus of claim 16 , further comprising one or more transmit antenna elements to radiate a transmit radar waveform.
18. The apparatus of claim 17 , further comprising one or more receive antenna elements to capture a receive radar waveform related to the transmit radar waveform.
19. The apparatus of claim 18 , further comprising a radar transceiver, coupled to the one or more receive antenna elements and the one or more transmit antenna element, to generate the digitized data flow based on the receive radar waveform.
20. The apparatus of claim 14 , wherein the channel alignment processor aligns the focused data flow by correcting one or more phase or amplitude of the focused data flow, or by using a complex scaling of the focused data flow.
21. The apparatus of claim 20 , wherein the correcting one or more phase or amplitude or the complex scaling includes in-phase and quadrature components of the focused data flow.
22. The apparatus of claim 20 , wherein the correcting one or more phase or amplitude or the complex scaling includes magnitude and phase components of the focused data flow.