Radar spectrum interpolation for vehicle navigation

Patent metadata

Field	Value
Publication number	US-12306333-B2
Application number	US-202217954829-A
Country	US
Kind code	B2
Filing date	Sep 28, 2022
Priority date	Sep 28, 2022
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A system for interpolating wireless spectrum. The system may include an antenna system operable for transmitting wireless signals and responsively receiving reflected signals. The system may additionally include an interpolation controller configured for collecting a plurality of reflection radar spectrum samples from the reflected signals, identifying an interpolation point between two or more interpolation samples of the samples, calculating an interpolation weight for the each of the interpolation samples, and determining an interpolated spectrum at the interpolation point as a summation of a product of the interpolation weights and the interpolation samples.

First claim

What is claimed is:

1. A system for interpolating radar spectrum for an advanced driving assistance system (ADAS) of a vehicle, the system comprising:
a radar system operable with the ADAS to facilitate detecting objects in an environment surrounding the vehicle, the radar system including a plurality of antennas configured for transmitting radar signals into the environment and responsively receiving reflected signals; and
an interpolation controller configured for collecting a plurality of reflection radar spectrum samples from the reflected signals, selecting an interpolation point between two or more interpolation samples of the reflection radar spectrum samples, calculating an interpolation weight for the each of the interpolation samples as a combination of weight coefficients providing a minimum mean square error between an interpolated radar spectrum and an actual radar spectrum at the interpolation point, and determining the interpolated radar spectrum at the interpolation point as a summation of a product of the interpolation weights and the interpolation samples.

2. The system according to claim 1 , wherein the interpolation controller is further configured to determine the interpolation weights according to a weighting vector, the weighting vector being represented as:
w =argmin w {|ŷ k+Δ −y k+Δ |},
where W is the weighting vector, ŷ k+Δ is the interpolated radar spectrum, and y k+Δ is the actual radar spectrum.

3. The system according to claim 2 , wherein the interpolation controller is further configured to determine the interpolated radar spectrum according to a spectrum function, the spectrum function being represented as:
ŷ k+Δ =w H y,
where ŷ k+Δ is the interpolated radar spectrum, w is the weighting vector, and y represents the reflected signals.

4. The system according to claim 3 , wherein:

w
=

[

w
1

w
2

]

;

y
=

[

y
1

y
2

]

;

and
wherein W 1 is a first weight of the interpolation weights, W 2 is a second weight of the interpolation weights, Y 1 is a first sample of the two or more interpolation samples, and y 2 is a second sample of the two or more interpolation samples.

5. The system according to claim 2 , wherein the interpolation controller is further configured to determine the interpolated radar spectrum according to a spectrum function, the spectrum function being represented as:
ŷ k+Δ =w 1 y k +w 2 y k+1
where ŷ k+Δ is the interpolated radar spectrum, y k is a first sample of the two or more interpolation samples, y k+1 is a second sample of the two or more interpolation samples,
W 1 is a first weight of the interpolation weights, and W 2 is a second weight of the interpolation weights.

6. The system according to claim 5 , wherein the interpolation controller is further configured to select the interpolation point to correspond with an offset selected relative to the first and second samples, the offset being represented as Δ.

7. The system according to claim 1 , wherein the radar system and the interpolation controller are disposed in the vehicle.

8. An interpolation controller for interpolating radar spectrum, the interpolation controller including a plurality of non-transitory instructions stored on a computer readable storage media, the non-transitory instructions being executable with a processor to cause the interpolation controller to:
select a plurality of reflection radar spectrum samples from reflected signals detected with a radar system, the radar system including a plurality of antennas configured for transmitting radar signals and responsively detecting the reflected signals;
select an interpolation point between two or more interpolation samples of the reflection radar spectrum samples;
calculate an interpolation weight for each of the interpolation samples as a combination of weight coefficient providing a minimum mean square error between an interpolated radar spectrum and an actual radar spectrum at the interpolation point; and
determine the interpolated radar spectrum at the interpolation point as a summation of a product of the interpolation weights and the interpolation samples.

9. The interpolation controller according to claim 8 , wherein the non-transitory instructions are further executable to cause the interpolation controller to determine the interpolation weights according to a weighting vector, the weighting vector being represented as:
w =argmin w {|ŷ k+Δ −y k+Δ |},
where W is the weighting vector, ŷ k+Δ is the interpolated radar spectrum, and y k+Δ is the actual radar spectrum.

10. The interpolation controller according to claim 9 , wherein the non-transitory instructions are further executable to cause the interpolation controller to determine the interpolated radar spectrum according to a spectrum function, the spectrum function being represented as:
ŷ k+Δ =W H y,
where ŷ k+Δ is the interpolated radar spectrum, W is the weighting vector, and y represents the reflected signals.

11. The interpolation controller according to claim 10 , wherein:

w
=

[

w
1

w
2

]

;

y
=

[

y
1

y
2

Assignees

• Gm Global Tech Operations Llc

Inventors

• Bialer Oded
• Longman Oren

Classifications

• G01S13/931

  of land vehicles · CPC title

• G01S13/584

  adapted for simultaneous range and velocity measurements · CPC title

• G01S13/867

  Combination of radar systems with cameras · CPC title

• G01S13/865

  Combination of radar systems with lidar systems · CPC title

• G01S13/862

  Combination of radar systems with sonar systems · CPC title