Discontinuous radar transmission for interference mitigation

Patent metadata

Field	Value
Publication number	US-12436228-B2
Application number	US-202017634107-A
Country	US
Kind code	B2
Filing date	Aug 12, 2020
Priority date	Aug 13, 2019
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A radar transceiver ( 400 ) including a transmit branch ( 450, 455 , TX) arranged to transmit a radar signal at a frequency F(t), and a receive branch (RX, 405, 410, 420, 430, 460 ) arranged to receive a radar signal, wherein the receive branch comprises an interference monitoring circuit ( 430 ) configured to monitor frequencies adjacent to the frequency F(t) for interference, and to generate a control signal ( 440 ) if interference is detected at the adjacent frequencies, wherein the transmit branch is arranged to be paused in response to the control signal ( 440 ).

First claim

The invention claimed is:

1. A method for suppressing interference in a radar transceiver, the method comprising the steps of:
transmitting a radar signal at a frequency F (t),
receiving a radar signal,
monitoring frequencies adjacent to the frequency F (t) for an interference, and, if the interference is detected in the adjacent frequencies,
determining a cross-over time duration for the interference in advance of an end of the interference, and
pausing radar signal transmission for the cross-over time duration,
wherein the transmitting comprises the steps of transmitting a frequency modulated continuous wave radar signal having the frequency F (t), and
wherein determining the cross-over time duration comprises determining a relative frequency gradient between the transmitted radar signal and an interfering radar signal.

2. The method according to claim 1 , wherein the monitoring comprises filtering the received radar signal to detect signal content at the adjacent frequencies.

3. The method according to claim 1 , wherein the monitoring comprises wavelet transforming or Fourier transforming the received radar signal to detect signal content at the adjacent frequencies.

4. The method according to claim 1 , wherein the monitoring comprises storing previously received radar signal segments.

5. The method according to claim 1 , wherein determining the cross-over time duration comprises tracking the interference as it crosses a receive bandwidth of the radar transceiver.

6. The method according to claim 1 , wherein determining the cross-over time duration comprises applying a contention-based back-off routine.

7. The method according to claim 1 , wherein determining the cross-over time duration comprises re-configuring a frequency derivative of the transmitted radar signal in dependence of parameters of the detected interference.

8. The method according to claim 1 , wherein determining the cross-over time duration comprises determining a fixed cross-over time duration.

9. The method according to claim 1 , wherein pausing the radar signal transmission comprises predicting and repairing the received radar signal.

10. The method according to claim 1 , comprising adjusting a transmission delay parameter of the transmitted radar signal in dependence of parameters of the detected interference.

11. A radar transceiver comprising:
a transmit branch arranged to transmit a radar signal at a frequency F (t), and a receive branch arranged to receive a radar signal,
wherein the receive branch comprises an interference monitoring circuit configured to monitor frequencies adjacent to the frequency F (t) for interference, and to generate a control signal if interference is detected at the adjacent frequencies,
wherein the interference monitoring circuit is configured to determine a cross-over time duration for the interference in advance of an end of the interference,
wherein the transmit branch is arranged to be paused in response to the control signal and for the cross-over time duration,
wherein the transmitting comprises the steps of transmitting a frequency modulated continuous wave radar signal having the frequency F (t), and
wherein determining the cross-over time duration comprises determining a relative frequency gradient between the transmitted radar signal and an interfering radar signal.

12. A vehicle comprising the radar transceiver according to claim 11 .

Assignees

• Veoneer Sweden Ab
• Magna Electronics Sweden Ab

Inventors

• Lefevre Andreas
• Moss Jonathan
• Fuchs Martin
• Kritzner Michael
• Goelz Hansjerg

Classifications

• G01S13/931

  of land vehicles · CPC title

• G01S13/32

  using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated · CPC title

• G01S7/0236

  Avoidance by space multiplex · CPC title

• G01S7/0235

  Avoidance by time multiplex · CPC title

• G01S7/0233

  Avoidance by phase multiplex · CPC title