Reducing undesirable coupling of signal(s) between two or more signal paths in a radar system

• US 20070152874A1
• Filed: 12/30/2005
• Published: 07/05/2007
• Est. Priority Date: 12/30/2005
• Status: Abandoned Application

• Current Assignee: Valeo Raytheon Systems, Inc. (Valeo SE)
• Original Assignee: Valeo Raytheon Systems, Inc. (Valeo SE)
• Inventors: Woodington, Walter
• Application Number:
  US11/323,982
• Publication Number:
  US 20070152874A1
• Time in Patent Office: Days
• US Class Current: 342/159
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 2013/9315 Monitoring blind spots
• CPC Class Codes: G01S 2013/9321 Velocity regulation, e.g. cruise control
• CPC Class Codes: G01S 2013/93274 on the side of the vehicles
• CPC Class Codes: G01S 7/0232 Avoidance by frequency multiplex
• CPC Class Codes: G01S 7/36 Means for anti-jamming , e.g. ECCM, i.e. electronic counter-counter measures

Abstract

In one aspect the invention is a method of reducing crosstalk in a radar system. The method includes receiving a reflected radar signal, down converting the reflected radar signal to an intermediate frequency (IF) signal and down converting the IF signal to a baseband signal. In another aspect the invention is a radar receiver. The radar receiver includes a first down converter for down converting a reflected radar signal to an intermediate frequency (IF) signal and a second down converter for down converting the IF signal received from the first down converter to a baseband signal.

Claims

1. A method of reducing crosstalk in a radar system, comprising:

receiving a reflected radar signal;

down converting the reflected radar signal to an intermediate frequency (IF) signal; and

down converting the IF signal to a baseband signal.

2. The method of claim 1 wherein down-converting the reflected radar signal to the intermediate frequency (IF) signal comprises down converting the reflected radar signal to the IF signal using a first oscillation signal.

3. The method of claim 2 wherein the first oscillation signal is a chirp oscillation signal.

4. The method of claim 3 wherein the first oscillation signal has a frequency between about 17.4 GHz and about 17.6 GHz.

5. The method of claim 2 wherein down converting the IF signal to the baseband signal comprises down converting the IF signal to the IF signal using a second oscillation signal.

6. The method of claim 5 wherein the second oscillation signal is a fixed oscillation signal.

7. The method of claim 6 wherein the second oscillation signal has a frequency of about 16.5 GHz.

8. The method of claim 5, further comprising up converting the first oscillation signal and the second oscillation signal to generate a radar transmission signal, the radar transmission being a source of the reflected radar signal.

9. The method of claim 8 wherein the transmission signal is chirped.

10. The method of claim 8 wherein a frequency of the transmission frequency is about 24 GHz.

11. A radar receiver comprising:

a first down converter for down converting a reflected radar to an intermediate frequency (IF) signal; and

a second down converter for down converting the IF signal received from the first down converter to a baseband signal.

12. The receiver of claim 11, further comprising a first signal source connected to the first down converter, the first signal source generating a first oscillation signal.

13. The receiver of claim 12 wherein the first oscillation signal is a chirp oscillation signal.

14. The receiver of claim 13 wherein the first oscillation signal has a frequency between about 17.4 GHz and about 17.6 GHz.

15. The receiver of claim 12, further comprising a second signal source connected to the second down converter, the second signal source generating a second oscillation signal.

16. The receiver of claim 15 wherein the second oscillation signal is a fixed oscillation signal.

17. The receiver of claim 16 wherein the second oscillation signal has a frequency of about 16.5 GHz.

18. The receiver of claim 15, wherein the first signal source and the second signal source are connected to a transmitter which up converts the first oscillation signal and the second oscillation signal to generate a radar transmission signal, the radar transmission being a source of the reflected radar signal.

19. The receiver of claim 18 wherein the transmission signal is chirped.

20. The receiver of claim 18 wherein a frequency of the transmission frequency is about 24 GHz.