Radar transmission and signal processing techniques using chirp slope variation
AssigneeNXP B.V.
InventorAndreas Gerhard Bury
Life of this patent
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Abstract
A method includes generating a plurality of chirps to be transmitted in a radar frame of a radar signal. Each chirp of the plurality of chirps has a corresponding chirp slope, and chirp slopes of a first subset of the plurality of chirps monotonically vary from a first chirp of the first subset to a last chirp of the first subset. The method also includes transmitting the plurality of chirps during a radar frame in a radar signal. After receiving the reflection of the radar signal, the method includes processing the received radar signal based on parameters associated with the generated plurality of chirps with the different chirp slopes.
Claims20
A method comprising:
- generating a plurality of chirps of a radar sequence of a radar frame, each chirp of the plurality of chirps having a corresponding chirp slope, wherein chirp slopes of a first subset of the plurality of chirps monotonically vary from a first chirp of the first subset to a last chirp of the first subset, wherein the chirp slope of each chirp is defined as a change in chirp frequency over a change in chirp duration, wherein a number of chirps of the first subset is less than a number of chirps of the plurality of chirps of the radar sequence;
- and
- transmitting the plurality of chirps during the radar frame.
A radar transmitter comprising:
- a radar chirp generator comprising a chirp slope controller configured to:
- generate a plurality of chirps of a radar sequence for transmission during a radar frame, each chirp of the plurality of chirps having a corresponding chirp slope, wherein chirp slopes of a first subset of the plurality of chirps monotonically vary from a first chirp of the first subset to a last chirp of the first subset, wherein the chirp slope is defined as a change in chirp frequency over a change in chirp duration of each chirp of the plurality of chirps, wherein a number of chirps of the first subset is less than a number of chirps of the plurality of chirps of the radar sequence;
- and
- one or more transmit antennas to transmit the plurality of chirps during the radar frame.
A radar system comprising:
- a radar front end comprising:
- a chirp generator to generate a plurality of chirps of a radar sequence for transmission, each chirp of the plurality of chirps having a corresponding chirp slope, wherein chirp slopes of a first subset of the plurality of chirps have positive chirp slopes that monotonically vary from a first chirp of the first subset to a last chirp of the first subset, wherein chirp slopes of a second subset of the plurality of chirps have negative chirp slopes that monotonically vary across the second subset, wherein the chirp slope is defined as a change in chirp frequency over a change in chirp duration of each chirp of the plurality of chirps, the chirp generator is configured to alternate chirps of the first subset with chirps of the second subset;
- one or more transmit antennas to transmit the plurality of chirps during a radar frame;
- a radar receiver to receive reflections of the plurality of chirps and generate digital samples based on the reflections;
- and
- a radar processor to generate range and velocity data based on the digital samples.
Dependencies are inferred from the claim text.