Offset correction techniques in distributed radar systems
AssigneeNXP USA, Inc.
InventorsAlaa Salaheldin Gomaa Ibrahim, Marco Jan Gerrit Bekooij
Life of this patent
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Abstract
A distributed radar system includes a reference clock source, a first radar front end, and a second radar front end. The reference clock source is configured to generate a reference clock signal. The first radar front end is configured to generate a first radar chirp signal based on the reference clock signal received from the reference clock source. The second radar front end is configured to generate a second radar chirp signal by modulating a time period between consecutive chirps in the second radar chirp signal based on a second frequency signal that is generated by upconverting the reference clock signal received from the reference clock source.
Claims20
A method comprising:
- upconverting, at an upconverter of a first radar front-end in a distributed radar system, a first signal having a first frequency to a second signal having a second frequency that is higher than the first frequency;
- generating, at a chirp generator of the first radar front-end, a first radar chirp signal, wherein the chirp generator modulates a time period between consecutive chirps in the first radar chirp signal based on the second signal;
- and
- transmitting the first radar chirp signal from the first radar front-end.
A radar front end comprising:
- an upconverter configured to:
- receive a first signal from a reference clock source of the radar front end, wherein the first signal has a first frequency, and
- upconvert the first signal to a second signal having a second frequency;
- a chirp generator configured to:
- generate a first radar chirp signal by modulating a time period between consecutive chirps in the first radar chirp signal based on the second signal;
- and
- a transmitter configured to transmit the first radar chirp signal.
A distributed radar system comprising:
- a first radar front end configured to generate a first radar chirp signal based on a reference clock signal received from a first reference clock source;
- and
- a second radar front end configured to generate a second radar chirp signal by modulating a time period between consecutive chirps in the second radar chirp signal based on a second frequency signal that is generated by upconverting a reference clock signal received from a second reference clock source.
Dependencies are inferred from the claim text.