METHOD, DEVICE AND SYSTEM FOR PROCESSING RADAR SIGNALS

• US 20150355319A1
• Filed: 06/05/2014
• Published: 12/10/2015
• Est. Priority Date: 06/05/2014
• Status: Active Grant

• Current Assignee: Infineon Technologies AG
• Original Assignee: Infineon Technologies AG
• Inventors: Roger, Andre, Ygnace, Romain, Addison, David
• Granted Patent: US 9,841,497 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01S 13/02 Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
• CPC Class Codes: G01S 13/343 using sawtooth modulation
• CPC Class Codes: G01S 13/42 Simultaneous measurement of distance and other co-ordinates indirect measurement G01S13/46
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 7/352 Receivers
• CPC Class Codes: G01S 7/356 involving particularities of FFT processing

Abstract

A device is suggested for processing input data received by several antennas, the device including a processing unit including a buffer and at least one multiplier, wherein the processing unit is configured to calculate a second stage FFT result based on input data received by a first antenna, multiply the second stage FFT result for the first antenna with a first compensation value, and store the result in the buffer. The processing unit is further configured to calculate a second stage FFT result based on input data received by a second antenna, multiply the second stage FFT for the second antenna with a second compensation value, and add the result to the value stored in the buffer.

Claims

1. A device for processing input data received by several antennas, the device comprising:

a processing unit comprising a buffer and at least one multiplier, wherein the processing unit is configured to;

calculate a second stage FFT result based on input data received by a first antenna,

multiply the second stage FFT result for the first antenna with a first compensation value and storing the result in the buffer,

calculate a second stage FFT result based on input data received by a second antenna, and

multiply the second stage FFT for the second antenna with a second compensation value and adding the result to the value stored in the buffer.

2. The device according to claim 1, wherein the multiplication and adding to the buffer is processed across the several antennas.

3. The device according to claim 1, wherein the processing unit is configured to conduct the steps for each second stage FFT value across the several antennas.

4. The device according to claim 1, wherein the processing unit is further configured to determine a third stage FFT result based on the value stored in the buffer.

5. The device according to claim 4, wherein an azimuth angle is determined based on the third stage FFT.

6. The device according to claim 1, wherein the second stage FFT result is based on a first stage FFT result.

7. The device according to claim 1, wherein the compensation value is set for each multiplication.

8. The device according to claim 1, wherein the compensation value is 1.

9. The device according to claim 1, wherein the compensation value is a complex value.

12. A computer program product directly loadable into a non-transitory storage medium of a digital processing device, comprising software code portions for performing the operations of the processing unit according to claim 1.

10. A method for processing input data received by several antennas, the method comprising:

calculating a second stage FFT result based on input data received by a first antenna,

multiplying the second stage FFT result for the first antenna with a first compensation value and storing the result in a buffer,

calculating a second stage FFT result based on input data received by a second antenna, and

multiplying the second stage FFT for the second antenna with a second compensation value and adding the result to the value stored in the buffer.

11. A device for processing input data received by several antennas, comprising:

means for calculating a second stage FFT result based on input data received by a first antenna,

means for multiplying the second stage FFT result for the first antenna with a first compensation value and storing the result in a buffer,

means for calculating a second stage FFT result based on input data received by a second antenna, and

means for multiplying the second stage FFT for the second antenna with a second compensation value and adding the result to the value stored in the buffer.