Calibrating array antennas based on signal energy distribution as a function of velocity
US11372083B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2019 |
| Grant date | Jun 28, 2022 |
| Priority date | — |
| Expiry date | Feb 9, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/267
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radar antenna calibration method includes: forming a detection matrix from signals detected by an arrangement of receive antennas in response to chirps transmitted by an arrangement of transmit antennas, the detection matrix having multiple rows corresponding to the chirps, multiple columns corresponding to a signal sample, and multiple planes corresponding the receive antennas; deriving a range matrix by performing a frequency transform on a portion of each row of the detection matrix; extracting a slice of the range matrix, with different rows of the slice being associated with different chirps and with different receive antennas; deriving a velocity matrix from the extracted slice by performing a frequency transform on a portion of each column of the extracted slice; analyzing the velocity matrix to determine a current peak width; and adjusting, based on the current peak width, phase shifts associated with one or more of the receive antennas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.