Fmcw radar apparatus having a plurality of processor cores used for signal processing

A technology of radar equipment and signal processing unit, which is applied in directional multi-channel systems using radio waves, direction finders and instruments using radio waves. The effect of shortening the time

Inactive Publication Date: 2012-07-04
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the calculation period for recognizing an object in the FMCW radar apparatus cannot be shortened, making it impossible to improve the response characteristics for detecting an object (eg, a vehicle)

Method used

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  • Fmcw radar apparatus having a plurality of processor cores used for signal processing
  • Fmcw radar apparatus having a plurality of processor cores used for signal processing
  • Fmcw radar apparatus having a plurality of processor cores used for signal processing

Examples

Experimental program
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Effect test

no. 1 example

[0030] refer to Figure 1 to Figure 4 , the first embodiment is described below. The overall configuration of the FMCW radar device (hereinafter referred to as "radar device") according to the first embodiment has been described. like figure 1 As shown, the radar apparatus 1 according to the first embodiment is an apparatus capable of detecting the distance between the target object and the own vehicle, the relative speed between the target object and the own vehicle, and the direction of the target object relative to the own vehicle. The radar device 1 includes a transmission / reception device 3 that transmits and receives radar waves and a signal processing unit 5 that controls the radar device 1 and processes various operations to detect a target object.

[0031] In particular, the radar device 1 is provided with a D / A (digital to analog) converter 7, a voltage controlled oscillator (VCO) 9, a distributor 11 and a transmitting antenna 13, wherein the D / A converter 7 respo...

no. 2 example

[0088] refer to Figure 5 , the second embodiment will be described below. In the second embodiment, similar contents to those in the first embodiment are omitted. According to the second embodiment, as Figure 5 As shown, unlike the radar apparatus of the first embodiment which puts multiple cores (for example, dual cores) in a single microprocessor (single-chip microprocessor), a plurality of microprocessors (single-chip microprocessor) 55 and 57 ( For example, two microprocessors) are arranged in the signal processing unit 53 of the radar device 51 .

[0089] In the first microprocessor 55, similarly to the first core, FFT processing is performed immediately after the reception data (up beat signal) at the up-shift modulation is obtained. In the second microprocessor 57 , FFT processing is performed in parallel with the processing performed at the microprocessor 55 immediately after the reception data at the down-shift modulation (down-shift beat signal) is obtained.

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PUM

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Abstract

The invention provides a FMCW radar apparatus having a plurality of processor cores used for signal processing. The FMCW radar apparatus obtaining information about a target object includes: a transmitter generating a transmission signal of which frequency is modulated based on the FMCW method, the receiver receiving the radar waves reflected at the object, a mixer that generates a beat signal from a mixed signal of the received signal and the transmission signal, and a signal processing unit processing the beat signal to obtain the information including a distance between the own vehicle and the target object, and a relative velocity of the target object. The signal processing unit includes first calculating means and second calculating means, which operate in parallel each other to calculate the information about the object based on the beat signal from an upward-modulation period when the frequency is modulated to be increased and from a downward-modulation period when the frequency is modulated to be decreased respectively.

Description

technical field [0001] The present invention relates to radar devices, and more particularly, to FMCW (Frequency Modulated Continuous Wave) radar devices for preventing collisions with obstacles. FMCW radar devices transmit and receive frequency-modulated radar waves to detect the relative distance or relative speed between an object and the device. Background technique [0002] Conventionally, radar equipment has been employed as a safety device mounted on vehicles for collision prevention. For example, Japanese Patent No. 3804253 discloses a radar device mounted on a vehicle capable of simultaneously detecting distance between an object (for example, a preceding vehicle) and the own vehicle by using the FMCW (Frequency Modulated Continuous Wave) method. Relative distance and relative speed between the object and the own vehicle (hereinafter referred to as FMCW radar device). Since the FMCW method can be simply implemented on the radar device, the FMCW radar device is sui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/93G01S13/931
CPCG01S13/584G01S3/74G01S7/35G01S13/62G01S13/343G01S13/931
Inventor 阿部好浩三岛英嗣
Owner DENSO CORP
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