A Parameter Estimation Method for FM CW Radar Target Based on Data Point Merging

A technology of frequency modulation continuous wave and parameter estimation, which is applied in radio wave measurement systems, instruments, etc., and can solve the problems of inaccurate determination of the number of targets and large parameter estimation errors.

Active Publication Date: 2020-12-11
杭州岸达科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a method for estimating target parameters of frequency modulation continuous wave radar based on data point merging, which aims to solve the problem of inaccurate determination of the number of targets and large parameter estimation errors in the prior art. technical problem

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  • A Parameter Estimation Method for FM CW Radar Target Based on Data Point Merging
  • A Parameter Estimation Method for FM CW Radar Target Based on Data Point Merging
  • A Parameter Estimation Method for FM CW Radar Target Based on Data Point Merging

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Embodiment 1

[0067] refer to Figure 1-7 , the embodiment of the present invention provides a target parameter estimation method based on data point merging provided by the present invention. Such as image 3 As shown, the method consists of a combination of two planar modes.

[0068] Step 101, determine plane mode 1, and merge will be performed on all planes thus divided. In the description of the following merging methods, only the x-y plane mode is taken as an example. Set the number of merge rounds N.

[0069] Step 102, take a two-dimensional data plane in the determined plane mode, define the requirements of core points, and determine which data points are core points.

[0070] Step 103, the two-dimensional data is combined for the first time. Merge the adjacent core points to get the target point. Definition: If the core point P1 with the value of (kx1, ky1) and the core point P2 with the value of (kx2, ky2) satisfy:

[0071] |kx1 – kx2|<=1 and |ky1 – ky2|<=1

[0072] Then P1...

Embodiment 2

[0105] The second implementation method provided by the present invention is to directly perform three-dimensional merging processing on the data cube raster data. Figure 8 A schematic flow chart of the method. Its processing method, including the merging criterion, is directly extended from the aforementioned two-dimensional merging method. At this time, the data points and the core points participating in the merger are three-dimensional (kx, ky, kz) data. Therefore, the expansion / compression process of step 206 / step 210 is for kx, ky and kz.

[0106] Step 203, three-dimensional initial merging. Merge the adjacent core points to get the target point. Definition: If the core point P1 whose value is (kx1, ky1, kz1) and the core point P2 whose value is (kx2, ky2, kz2) satisfy:

[0107] |kx1 – kx2|<=1 and |ky1 – ky2|<=1 and |kz1 – kz2|<=1

[0108] Then P1 and P2 are the initial merged adjacent core points. The three-dimensional initial merger criteria are as follows:

[...

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Abstract

The invention provides a data point merging based frequency modulated continuous wave radar target parameter estimation method. An input is a grid coordinate value of a three-dimensional feature datapoint of an echo signal, and an output is an estimated grid coordinate value of each target. The distance, velocity and orientation corresponding to the output grid coordinate values are the estimatedvalues of the target parameters. According to the data point generation mechanism, adjacent data points are merged into one target point, and the merged result can be merged again as input data of the next round of merge processing. The method can distinguish a target with very small parameter spacing, thereby correctly determining the target number and improving the estimation accuracy of the distance, the velocity and the orientation.

Description

technical field [0001] The present invention relates to the technical field of frequency modulation continuous wave (FMCW) radar target parameter estimation, in particular to judging the number of targets and estimating the target distance, speed and orientation parameters by merging the data points of the three-dimensional characteristics of the frequency modulation continuous wave radar echo signal Methods. Background technique [0002] The three-dimensional characteristics of the echo signal are the basis for FM CW radar target parameter estimation. Specifically, two-dimensional fast Fourier spectrum analysis (that is, range FFT and Doppler FFT) is performed on the echo difference frequency signals of multiple sweep cycles at a certain azimuth angle, and the grid coordinates corresponding to each power peak value A point, that is, a distance and a Doppler sampling point, represented by a grid coordinate and a power value, is a data point. All data points constitute a ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 邱万智张远辉郑海树张凡
Owner 杭州岸达科技有限公司
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