US 12,613,311 B2 · Calibration of radar with multiple transmitters

Abstract

A radar system has a plurality of radar transmitters and at least one radar receiver, each radar transmitter having a transmitter adjuster for tuning the output of the respective transmitter, for example tuning the phase of each of a plurality of constellation points of a constellation. The radar system may operate in a calibration cycle by transmitting from a single radar transmitter using the transmitter adjuster, obtaining an estimate of the error in the transmitter adjuster and adjusting the transmitter adjuster according to the estimate of the error. In an operation cycle the radar system may transmit using the plurality of radar transmitters, the signal being transmitter from each radar transmitter being tuned using the transmitter adjuster. Calibration cycles are interspersed between operation cycles during operation.

Claims19

Dependent claims

A method of operating a radar system having a plurality of radar transmitters and at least one radar receiver, each radar transmitter having a transmitter adjuster for tuning an output of a respective transmitter, the method comprising:

in a calibration cycle,
transmitting from a single radar transmitter using the transmitter adjuster while all other radar transmitters in the plurality of radar transmitters are deactivated;
receiving a resulting signal on the at least one radar receiver;
identifying a target based on the resulting signal;
carrying out a range vector extraction on a decoded range Fourier transform corresponding to the target to obtain an extracted range vector;
obtaining an estimate of an error in the transmitter adjuster using the extracted range vector;
and
tuning the transmitter adjuster according to the estimate of the error;
and
in an operation cycle,
transmitting a signal using the plurality of radar transmitters, the signal being transmitted from each radar transmitter using the tuned transmitter adjuster;
and
repeating calibration cycles interspersed between operation cycles during operation.

10 more elements

A radar apparatus, comprising:

a plurality of radar transmitters, each radar transmitter having a transmitter adjuster for tuning an output of a respective transmitter;
at least one radar receiver;
and
a radar controller configured to
in a calibration cycle,
transmit from a single radar transmitter using the transmitter adjuster while all other radar transmitters in the plurality of radar transmitters are deactivated;
receive a resulting signal on the at least one radar receiver;
identify a target based on the resulting signal;
carry out a range vector extraction on a decoded range Fourier transform corresponding to the target to obtain an extracted range vector;
obtain an estimate of an error in the transmitter adjuster using the extracted range vector;
and
tune the transmitter adjuster according to the estimate of the error;
and
in an operation cycle,
transmit a signal using the plurality of radar transmitters, the signal being transmitted from each radar transmitter using the tuned transmitter adjuster;
and
repeat calibration cycles interspersed between operation cycles during operation.

14 more elements

Dependencies are inferred from the claim text.

Calibration of radar with multiple transmitters

Life of this patent

Calibration of radar with multiple transmitters

Life of this patent

Abstract

Claims19