Radar interference detection and mitigation

Patent metadata

Field	Value
Publication number	US-12196844-B2
Application number	US-202217659426-A
Country	US
Kind code	B2
Filing date	Apr 15, 2022
Priority date	Apr 15, 2022
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

Architectures and techniques for radar interference detection are provided. A radar sensor system in accordance with the present disclosure may receive, via a radio frequency (RF) receiver, radar signals including a radar signal of interest and one or more interfering radar signals. The radar sensor system may calculate a Doppler spectrum for each of the radar signals and perform a chirplet transform on the Doppler spectrum to generate various waveform parameters. A Principal Component Analysis (PCA) may be performed on the waveform parameters to extract frequency features of the radar signals. The radar sensor system may classify the frequency features using a classifier to identify interfering frequency features associated with the interfering radar signals using a classifier. The radar sensor system may further extract interfering waveform information based on the interfering frequency features of the interfering RF signals. Interference mitigation may be performed utilizing the interfering waveform information.

First claim

What is claimed is:

1. A system comprising:
a memory system to store processor-executable instructions; and
one or more hardware processors coupled with the memory system, the one or more hardware processors are configured to:
receive, via a radio frequency (RF) receiver, one or more RF signals comprising an RF signal of interest and one or more interfering RF signals;
extract a plurality of frequency features of the one or more RF signals;
identify, using a classifier, one or more first frequency features of the plurality of frequency features as interfering frequency features of the interfering RF signals;
extract interfering waveform information based on the interfering frequency features of the interfering RF signals; and
provide the interfering waveform information to a waveform generator for interference mitigations
wherein, to extract the plurality of frequency features of the one or more RF signals, the one or more hardware processors are further to:
calculate a Doppler spectrum of each of the received one or more RF signals; and
perform a chirplet transform on the Doppler spectrum to generate a plurality of waveform parameters.

2. The system of claim 1 , wherein the interfering waveform information comprises phase noise of the one or more interfering RF signals.

3. The system of claim 1 , wherein the interfering waveform information comprises at least one of a phase, a frequency change rate, and a bandwidth of the one or more interfering RF signals.

4. The system of claim 1 , wherein, to extract the plurality of frequency features of the one or more RF signals, the one or more hardware processors are further to:
perform a principal component analysis on the waveform parameters, wherein the plurality of frequency features of the one or more RF signals comprises a plurality of principal components of the waveform parameters.

5. The system of claim 1 , wherein the waveform parameters comprise at least one of a start frequency, a phase offset, or a chirp rate, or a pulse repetition frequency.

6. The system of claim 1 , wherein the one or more hardware processors are further configured to:
identify, using the classifier, one or more second frequency features of the plurality of frequency features as frequency features associated with the RF signal of interest; and
performing beamforming utilizing the one or more second frequency features.

7. A non-transitory computer-readable medium having stored thereon instructions that, when executed by one or more processors, are configurable to cause the one or more processors to:
receive, via a radio frequency (RF) receiver, one or more RF signals comprising an RF signal of interest and one or more interfering RF signals;
extract a plurality of frequency features of the one or more RF signals;
identify, using a classifier, one or more first frequency features of the plurality of frequency features as interfering frequency features of the interfering RF signals;
extract interfering waveform information based on the interfering frequency features of the interfering RF signals; and
provide the interfering waveform information to a waveform generator for interference mitigation
wherein, to extract the plurality of frequency features of the one or more RF signals, the one or more processors are further to:
calculate a Doppler spectrum of each of the received one or more RF signals; and
perform a chirplet transform on the Doppler spectrum to generate a plurality of waveform parameters.

8. The non-transitory computer-readable medium of claim 7 , wherein the interfering waveform information comprises phase noise of the one or more interfering RF signals.

9. The non-transitory computer-readable medium of claim 7 , wherein the interfering waveform information comprises at least one of a phase, a frequency change rate, and a bandwidth of the one or more interfering RF signals.

10. The non-transitory computer-readable medium of claim 7 , further comprising instructions that, when executed by the one or more processors, cause the one or more processors to extract the plurality of frequency features of the one or more RF signals by:
performing a principal component analysis on the waveform parameters, wherein the plurality of frequency features of the one or more RF signals comprises a plurality of principal components of the waveform parameters.

11. The non-transitory computer-readable medium of claim 7 , wherein the waveform parameters comprise at least one of a start frequency, a phase offset, a chirp rate, or a pulse repetition frequency.

12. A method comprising:
receiving, via a radio frequency (RF) receiver, one or more RF signals comprising an RF signal of interest and one or more interfering RF signals;
extracting, by one or more hardware processors, a plurality of frequency features of the one or more RF signals;
identifying, using a classifier, one or more first frequency features of the plurality of frequency features as interfering frequency features of the interfering RF signals;
extracting interfering waveform information based on the interfering frequency features of the interfering RF signals; and
providing the interfering waveform information to a waveform generator for interference mitigation
wherein, to extract the plurality of frequency features of the one or more RF signals, the one or more hardware processors are further to:
calculate a Doppler spectrum of each of the received one or more RF signals; and
perform a chirplet transform on the Doppler spectrum to generate a plurality of waveform parameters.

13. The method of claim 12 , wherein the interfering waveform information comprises phase noise of the one or more interfering RF signals.

14. The method of claim 12 , wherein the interfering waveform information comprises at least one of a phase, a frequency change rate, and a bandwidth of the one or more interfering RF signals.

15. The method of claim 12 , wherein extracting the plurality of frequency features of the one or more RF signals comprises:
perform a principal component analysis on the waveform parameters, wherein the plurality of frequency features of the one or more RF signals comprises a plurality of principal components of the waveform parameters.

16. The method of claim 12 , wherein the waveform parameters comprise at least one of a start frequency, a phase offset, a chirp rate, or a pulse repetition frequency.

17. The method of claim 12 , further comprising:
identifying, using the classifier, one or more second frequency features of the plurality of frequency features as frequency features associated with the RF signal of interest; and
performing beamforming utilizing the one or more second frequency features.

Assignees

• Gm Cruise Holdings Llc

Inventors

• Tapia Daniel Flores

Classifications

• G01S13/931

  of land vehicles · CPC title

• G01S13/79

  Systems using random coded signals or random pulse repetition frequencies {, e.g. "Separation and Control of Aircraft using Non synchronous Techniques" [SECANT]} · CPC title

• G01S13/9023

  combined with interferometric techniques · CPC title

• G01S7/0232

  Avoidance by frequency multiplex · CPC title

• G01S7/0236

  Avoidance by space multiplex · CPC title