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Processing method for millimeter-wave radar signals in adaptive cruise

A technology of millimeter-wave radar and adaptive cruise, applied in radio wave reflection/re-radiation, radio wave measurement system, utilization of re-radiation, etc., can solve problems such as adjusting radar signal processing methods, and achieve the effect of improving accuracy

Active Publication Date: 2018-05-11
HUIZHOU DESAY SV AUTOMOTIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no precedent in the existing technology that can adaptively adjust the radar signal processing method according to the road attributes

Method used

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  • Processing method for millimeter-wave radar signals in adaptive cruise
  • Processing method for millimeter-wave radar signals in adaptive cruise
  • Processing method for millimeter-wave radar signals in adaptive cruise

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Experimental program
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Embodiment 1

[0034] Such as figure 1 As shown, the processing method of the millimeter-wave radar signal in the adaptive cruise of the present invention is mainly used to acquire and process the millimeter-wave radar signal at the current moment of the target obstacle near the vehicle. The reception is easily affected by vehicle speed, road traffic conditions, etc. In order to eliminate the influence of the surrounding environment on the millimeter wave radar signal, it is necessary to adjust the signal processing method for various environments. This embodiment provides automatic identification of road attributes according to the geographical location of the vehicle The millimeter-wave radar signal processing method is as follows:

[0035] S10. Obtain the road attribute of the road where the current vehicle is located according to the navigation information. The road attribute refers to the type of road. The road attribute can be but not limited to one of expressways, ordinary roads, and ...

Embodiment 2

[0047] The difference between this embodiment and Embodiment 1 is that the moving target detection in this embodiment has multiple levels of stages, and the stages are negatively correlated with the speed of the vehicle. That is, the higher the speed of the vehicle, the lower the number of stages of moving object detection, and the number of stages of moving object detection in this embodiment is 3. When the speed of the vehicle is high, select the low order number, and vice versa, select the high order number.

[0048] In addition, the moving target display also has multiple levels of pulse numbers, which are positively correlated with the complexity of the road state. The more complex the road state, the higher the noise, so a higher number of pulses is required to control the noise. In this embodiment, the number of levels of pulses displayed by the moving object is two. On urban roads, high pulse counts are usually used for filtering.

Embodiment 3

[0050] The difference between this embodiment and embodiment 1 is: as figure 2 shown. The constant false alarm processing in the present embodiment comprises the following sub-steps: as image 3 as shown,

[0051] S41. Select a criterion according to the road attribute of the current vehicle location, for example, select a mean value criterion, an ordered statistical criterion or an automatic screening criterion according to the complexity of the environment from high to low. The estimated value of the noise power is calculated according to the obtained signal context; in this embodiment, a protection unit signal is provided between two adjacent radar signals for separating and identifying radar signal data.

[0052]S42. Selecting a distance parameter α according to the distance, α decreases as the distance increases, and performs tensor product calculation with the noise power estimated value to obtain the constant false alarm threshold;

[0053] S43. Comparing the consta...

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Abstract

The invention relates to a processing method for millimeter-wave radar signals in adaptive cruise, which is used for acquiring and processing millimeter-wave radar signals of a target obstacle near avehicle at the current moment. The processing method comprises the steps of S10, acquiring road attributes of the current position according to navigation information; S20, selecting a signal processing mode and a filtering model according to the road attributes; S30, accumulating and filtering the millimeter-wave radar signals by using the filtering model; S40, performing constant false alarm processing on the signals acquired in the step S30; S50, and completing target detection and angle calculation according to the structure constant false alarm processing. The invention provides a methodof integrating navigation scene information into millimeter-wave radar signal processing, and different filtering parameters are selected according to different road information, thereby being more accurate in judgment for the radar signals finally, and providing an accurate basis for point trace recognition of the subsequent adaptive navigation. Meanwhile, the processing method can adapt to target detection in various road conditions such as expressways, ordinary highways and urban roads, and improves the accuracy of tracking by using radar speed measurement information.

Description

technical field [0001] The invention relates to the field of vehicle electronics, in particular to a method for processing millimeter wave radar signals in adaptive cruise. Background technique [0002] Since millimeter-wave radar can directly measure distance and speed information, it has natural advantages in adaptive cruise systems and pre-collision systems. Therefore, the application of millimeter-wave radar in automobiles is currently the most mainstream solution for adaptive cruise control and has a huge market prospect. However, most of the current adaptive cruise systems only collect the speed information and distance information of the target ahead for adaptive processing, without considering the current traffic conditions on the road surface and the current state of the road. When the road traffic conditions are complex and the road is rough and curved, the difficulty of millimeter wave radar data processing and recognition rate will increase. [0003] In the ada...

Claims

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Application Information

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IPC IPC(8): G01S13/93
CPCG01S13/931G01S2013/9322
Inventor 吴军倪如金
Owner HUIZHOU DESAY SV AUTOMOTIVE
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