APPARATUS AND METHOD FOR DETECTING TARGET USING RADAR

• US 20150338513A1
• Filed: 06/23/2014
• Published: 11/26/2015
• Est. Priority Date: 05/20/2014
• Status: Active Grant

• Current Assignee: Hyundai Mobis Co., Ltd.
• Original Assignee: Hyundai Mobis Co., Ltd.
• Inventors: MOON, Sung Hoon, LEE, Hee Deok
• Granted Patent: US 9,726,758 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01S 13/0209 Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
• CPC Class Codes: G01S 13/04 Systems determining presence of a target based on relative movement of target G01S13/56
• CPC Class Codes: G01S 13/5244 Adaptive clutter cancellation specially adapted for airborne MTI, G01S13/5242
• CPC Class Codes: G01S 13/5246 post processors for coherent MTI discriminators, e.g. residue cancellers, CFAR after Doppler filters
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 7/02 of systems according to group G01S13/00
• CPC Class Codes: G01S 7/2923 based on data belonging to a number of consecutive radar periods
• CPC Class Codes: G01S 7/2927 by deriving and controlling a threshold value

Abstract

The present invention suggests a target detecting apparatus and method using a radar which detect a target using a recursive modified cell average-constant false alarm rate (RMCA-CFAR) detector without having a sorting process. The present invention provides a target detecting apparatus using a radar, the apparatus including: a data selecting unit which compares reference data with at least one of previous data and subsequent data which are located at both sides of the reference data, from a received signal including information on a distance and a speed for multiple targets, to select specific data; a cell average calculating unit which calculates an average of cells extracted using a sliding window including the specific data; a CFAR data detecting unit which detects CFAR data based on the average of the extracted cells; and a target detecting unit which detects the target based on the CFAR data.

Claims

1. A target detecting apparatus using a radar, the apparatus comprising:

a data selecting unit which compares reference data with at least one of previous data and subsequent data which are located at both sides of the reference data, from a received signal including information on a distance and a speed for multiple targets, to select specific data;

a cell average calculating unit which calculates an average of extracted cells using a sliding window including the specific data;

a CFAR data detecting unit which detects constant false alarm rate (CFAR) data based on the average of the extracted cells; and

a target detecting unit which detects the target based on the CFAR data.

2. The apparatus of claim 1, wherein the data selecting unit selects data having a minimum value as the specific data.

3. The apparatus of claim 1, wherein when there is no previous data, the data selecting unit compares the reference data with at least one of the subsequent data to select the specific data, when there is no subsequent data, compares the reference data with at least one of the previous data to select the specific data, and when there are the previous data and the subsequent data, compares the reference data, the previous data, and the subsequent data to select the specific data.

4. The apparatus of claim 1, wherein the cell average calculating unit calculates the average of the extracted cells in accordance with the shift of the sliding window.

5. The apparatus of claim 1, further comprising:

a cell size determining unit which determines a size of a cell which includes at least one of the previous data and the subsequent data and the reference data in accordance with the position of the sliding window.

6. The apparatus of claim 1, wherein the CFAR data detecting unit multiplies the average of the extracted cells by a predetermined factor to detect the CFAR data.

7. The apparatus of claim 1, wherein the target detecting unit detects multiple targets using a vehicle radar in a cluttered environment.

8. The apparatus of claim 1, wherein the target detecting apparatus is mounted in a vehicle.

9. A target detecting method using a radar, the method comprising:

comparing reference data with at least one of previous data and subsequent data which are located at both sides of the reference data, from a received signal including information on a distance and a speed for multiple targets, to select specific data;

calculating an average of extracted cells using a sliding window including the specific data;

detecting constant false alarm rate (CFAR) data based on the average of the extracted cells; and

detecting the target based on the CFAR data.

10. The method of claim 9, wherein in the selecting, data having a minimum value is selected as the specific data.

11. The method of claim 9, wherein in the selecting, when there is no previous data, the reference data is compared with at least one of the subsequent data to select the specific data, when there is no subsequent data, the reference data is compared with at least one of the previous data to select the specific data, and when there are the previous data and the subsequent data, the reference data, the previous data, and the subsequent data are compared to select the specific data.

12. The method of claim 9, wherein in the calculating, the average of the extracted cells is calculated in accordance with the shift of the sliding window.

13. The method of claim 9, further comprising:

determining a size of a cell which includes at least one of the previous data and the subsequent data and the reference data in accordance with the position of the sliding window.

14. The method of claim 9, wherein in the detecting of CFAR data, the average of the extracted cells is multiplied by a predetermined factor to detect the CFAR data.

15. The method of claim 9, wherein in the detecting of a target, multiple targets are detected using a vehicle radar in a cluttered environment.