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Electronic scanning type radar device

A radar system and electronic scanning technology, which is applied in the field of vehicle electronic scanning radar system, can solve the problems of poor measurement accuracy and achieve the effect of suppressing the influence

Active Publication Date: 2009-10-28
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Interfering signals at high electrical power levels are the main cause of poor measurement accuracy

Method used

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  • Electronic scanning type radar device
  • Electronic scanning type radar device
  • Electronic scanning type radar device

Examples

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Embodiment Construction

[0067] A first embodiment of the present invention will be described below with reference to the drawings.

[0068] Figure 4 is a block diagram showing an electronic scanning radar system 1 according to an embodiment of the present invention. The radar system 1 is an FM-CW radar system using a transmission signal Tx obtained by applying frequency modulation (FM) to a continuous wave (CW). In addition, the radar system 1 is a DBF radar system in which digital beamforming processing is performed in the receiving array antenna 8 . The radar system 1 is a so-called on-vehicle radar system mounted on a vehicle, and detects, for example, a distance to a vehicle (target) traveling ahead or a relative speed of a vehicle traveling ahead. The detection results of the radar system 1 are used, for example, as information for controlling the running of the vehicle. Microwaves are used as transmitted waves.

[0069] The radar system 1 has a transmitting / receiving section 4 including: a...

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PUM

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Abstract

A beat signal (RD) sampled is cut into a plurality of pieces of short-time data (SD) in a time direction for each antenna element. The interfering component frequency of an interfering wave is detected from the frequency spectrum of the short-time data (SD). The interfering component frequency of the interfering wave is subjected to a digital beam forming treatment so that the peak of an electric power in an azimuth direction is extracted to estimate the absolute value of the interfering component in an arriving azimuth. From the absolute value of the estimated interfering component in the arriving direction, a filter for suppressing the interfering component is activated to suppress the interfering component.

Description

technical field [0001] The invention relates to an electronic scanning radar system, in particular to a vehicle electronic scanning radar system utilizing FM-CW technology, which can suppress interference signals contained in received signals. Background technique [0002] figure 1 A timing diagram indicative of transmit / receive signals in FM-CW radar technology and the principle of hybrid processing is shown. figure 2 is a plan view showing an example of the environment of a road with opposing lanes. image 3 (a) and (b) show the state of signal processing in a radar system equipped with a vehicle in a case where a jamming signal is received from another vehicle. [0003] In order to prevent collisions between vehicles and perform inter-vehicle control, on-vehicle radars have been developed that measure distance, speed, and azimuth with respect to a forward target such as a preceding vehicle. [0004] As a means for measuring the distance to the front target and the rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/34G01S7/02
CPCG01S2007/356G01S13/42G01S13/345G01S7/352G01S13/931G01S7/2813G01S7/023G01S7/356
Inventor 山野千晴夏目一马渡边优坂本麻衣
Owner DENSO CORP
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