Method for generating a compact representation of radar data, radar device and radar data processing circuit

Patent metadata

Field	Value
Publication number	US-2019317205-A1
Application number	US-201916385392-A
Country	US
Kind code	A1
Filing date	Apr 16, 2019
Priority date	Apr 16, 2018
Publication date	Oct 17, 2019
Grant date	—

Abstract

A method for generating a compact representation of radar data, includes determining at least one data peak within a multi-dimensional representation of radar data; and compressing radar data samples of the multi-dimensional representation within a limited neighborhood around the at least one data peak to generate the compact representation.

First claim

What is claimed is:

1 . A method for generating a compact representation of radar data, the method comprising:
determining at least one data peak within a multi-dimensional representation of radar data, wherein the multi-dimensional representation of the radar data comprises a first dimension for a distance, a second dimension for a velocity, and a third dimension for a receive channel; selecting a first limited neighborhood around the at least one data peak, wherein the selected first limited neighborhood includes data bins with different positions in the third dimension and identical positions in the first and the second dimensions of the multi-dimensional representation of the radar data; compressing first radar data samples of the multi-dimensional representation located within the first limited neighborhood around the at least one data peak to generate the compact representation of radar data; and transmitting the compressed first radar data samples as the compact representation of the radar data.

2 . The method of claim 1 , wherein compressing the first radar data samples comprises:
requantizing a phase component of the first radar data samples located within the first limited neighborhood.

3 . The method of claim 1 , wherein compressing the radar data samples comprises:
representing an amplitude component of neighboring radar data samples with a reduced number of bits, wherein the neighboring radar data samples are associated with at least one of the first radar data samples located within the first limited neighborhood.

4 . The method of claim 3 , wherein representing the amplitude component of the neighboring radar data samples comprises:
calculating a joint parametrization for the amplitude components of the neighboring radar data samples.

5 . The method of claim 4 , further comprising:
calculating a mean value of the amplitude components of the neighboring radar data samples as the joint parametrization.

6 . The method of claim 3 , further comprising:
determining the neighboring radar data samples by selecting data bins within the multi-dimensional representation of the radar data, the selected data bins having different positions in a receive channel dimension and identical positions in remaining dimensions of the multi-dimensional representation of the radar data, the remaining dimensions being different from the receive channel dimension.

7 . The method of claim 1 , further comprising:
determining remaining data peaks within the multi-dimensional representation of the radar data; compressing second radar data samples of the multi-dimensional representation located within second limited neighborhoods around all of the remaining data peaks; and transmitting the compressed first radar data samples and the compressed second radar data samples as the compact representation of the radar data.

8 . The method of claim 1 , wherein the multi-dimensional representation of the radar data comprises a first dimension for a distance, a second dimension for a velocity, and a third dimension for a receive channel.

9 . A method for generating a compact representation of radar data based on a multi-dimensional representation of the radar data in which a receive channel dimension represents a receive channel, the method comprising:
selecting data bins within the multi-dimensional representation of the radar data, the selected data bins having different positions in the receive channel dimension and identical positions in remaining dimensions of the multi-dimensional representation of the radar data, the remaining dimensions being different from the receive channel dimension; compressing neighboring radar data samples of the selected data bins by representing an amplitude component of the neighboring radar data samples of the selected data bins with a reduced number of bits; and transmitting the compressed neighboring radar data samples as the compact representation of the radar data.

10 . The method of claim 9 , further comprising:
calculating a joint parametrization for the amplitude component of the neighboring radar data samples to represent the amplitude component with the reduced number of bits.

11 . A radar device, comprising:
radar data generation circuitry configured to provide a multi-dimensional representation of radar data, wherein the multi-dimensional representation of the radar data comprises a first dimension for a distance, a second dimension for a velocity, and a third dimension for a receive channel; and a radar data processor configured to determine at least one data peak within the multi-dimensional representation of the radar data, and compress radar data samples of the multi-dimensional representation of the radar data located within a limited neighborhood around the at least one data peak to generate a compact representation of the radar data.

12 . The radar device of claim 11 , wherein the radar data processor is configured to select the limited neighborhood around the at least one data peak, wherein the selected first limited neighborhood includes data bins with different positions in the third dimension and identical positions in the first and the second dimensions of the multi-dimensional representation of the radar data,

13 . The radar device of claim 11 , wherein the radar data processor is further configured to represent an amplitude component of neighboring radar data samples with a reduced number of bits, wherein the neighboring radar data samples are associated with at least one of the radar data samples located within the limited neighborhood.

14 . The radar device of claim 11 , wherein the radar data processor is further configured to requantize a phase component of the radar data samples located within the limited neighborhood.

15 . The radar device of claim 11 , further comprising:
an output interface configured to output the compact representation of the radar data.

16 . The radar device of claim 11 , further comprising:
a processor configured to estimate a direction of arrival of a radar echo based on the compact representation of the radar data.

17 . A radar data processing circuit, comprising:
an input interface configured to receive a compact representation of radar data, the compact representation of the radar data comprising compressed radar data samples taken from a limited neighborhood around at least one data peak; and a processor configured to estimate object characteristics based on the compact representation of the radar data.

18 . The radar data processing circuit of claim 17 , wherein the processor is configured to determine a direction of arrival of a radar echo associated to an object based on the compact representation of the radar data.

19 . The radar data processing circuit of claim 17 , wherein the processor is configured to attribute an object to one of multiple object classes based on the compact representation of the radar data.

20 . The radar data processing circuit of claim 17 , further comprising:
a decompression circuit configured to evaluate a joint parametrization to calculate amplitude components of neighboring radar data samples.

Assignees

• Infineon Technologies Ag

Inventors

• Meissner Paul
• Haltmeier Markus
• Khalid Farhan Bin
• Roger Andre
• Sappl Johannes

Classifications

• G01S7/41

  using analysis of echo signal for target characterisation; Target signature; Target cross-section · CPC title

• H03M7/3059

  Digital compression and data reduction techniques where the original information is represented by a subset or similar information, e.g. lossy compression · CPC title

• H03M7/30

  Compression (speech analysis-synthesis for redundancy reduction G10L19/00; for image communication H04N); Expansion; Suppression of unnecessary data, e.g. redundancy reduction · CPC title

• G01S13/931 Primary

  of land vehicles · CPC title

• G01S13/42

  Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S13/46) · CPC title