Radar post processing for sidelobe suppression

Patent metadata

Field	Value
Publication number	US-10656248-B2
Application number	US-201715592638-A
Country	US
Kind code	B2
Filing date	May 11, 2017
Priority date	May 11, 2017
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

A system, method and apparatus for detecting a plurality of targets in a radar device are disclosed. A transmitter transmits a source signal and a receiver receives echo signals from reflection of the source signal from the plurality of targets. A composite signal is generated that includes a plurality of target signals from the plurality of echo signals. A largest signal in the composite signal is identified and a value of a parameter of the largest signal is estimated. A representative signal is generated as a convolution of a point target having the estimated value of the parameter. The representative signal is subtracted from the composite signal to obtain a remaining signal. Another of the plurality of targets is determined using the remaining signal.

First claim

What is claimed is:

1. A method of detecting a second target from a first target in a radar system, comprising:
obtaining a composite signal including a first target signal and a second target signal, the first target signal obtained by reflection of a source signal of the radar system from the first target and the second target signal obtained by reflection of the source signal from the second target;
identifying, at a processor, the first target signal in the composite signal;
generating, at the processor, a representative signal for the first target signal via a convolution of a point target having a parameter value of the first target signal;
subtracting, at the processor, the representative signal from the composite signal to obtain a remaining signal; and
detecting, at the processor, the second target from the remaining signal.

2. The method of claim 1 , wherein the first target signal is stronger than the second target signal.

3. The method of claim 2 , wherein subtracting the representative signal from the composite signal removes a side lobe from the composite signal to reveal the second target signal when a peak of the second target signal coincides with the side lobe.

4. The method of claim 1 further comprising determining the parameter value of the first target signal and creating the point target with the parameter value.

5. The method of claim 1 , wherein the parameter value of the first target signal is indicated by an apex of a central peak of the first target signal.

6. The method of claim 1 , wherein generating the representative signal for the first target signal via the convolution of the point target further comprises convolving the point target with a sinc function.

7. The method of claim 1 , wherein the parameter is at least one of: (i) range; (ii) azimuth; (iii) elevation; and (iv) relative velocity.

8. The method of claim 1 , wherein the first target and second target are determined with respect to a vehicle that employs the radar system to allow the vehicle to maneuver with respect to the first target and the second target.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Bilik Igal
• Pokrass Alexander
• Laifenfeld Moshe

Classifications

• G01S7/354

  Extracting wanted echo-signals (Doppler systems G01S13/50) · CPC title

• G01S2013/9318

  Controlling the steering · CPC title

• G01S13/931

  of land vehicles · CPC title

• G01S7/2922

  by using a controlled threshold · CPC title

• G01S7/32

  Shaping echo pulse signals; Deriving non-pulse signals from echo pulse signals · CPC title