Method and system for recognizing high-band first-order Bragg peak and split spectrum peak thereof

An identification method and high-frequency band technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of poor Bragg peak identification, low measurement accuracy, and inability to identify split spectrum peaks, etc.

Inactive Publication Date: 2011-08-03
HARBIN INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of poor Bragg peak identification effect, low measurement accuracy and inability to identify split spectrum peaks in the traditional method under complex clutter / target background and changing marine environment conditions, the present invention provides a high-frequency first-order Bragg peak Method and system for identifying peaks and their split spectrum peaks

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  • Method and system for recognizing high-band first-order Bragg peak and split spectrum peak thereof
  • Method and system for recognizing high-band first-order Bragg peak and split spectrum peak thereof
  • Method and system for recognizing high-band first-order Bragg peak and split spectrum peak thereof

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specific Embodiment approach 1

[0036] Specific implementation mode 1. Combination figure 1 Illustrate this specific embodiment, a kind of identification method of high-frequency band first-order Bragg peak and split spectrum peak thereof, it is realized by the following steps:

[0037] Step 1, using a high-frequency over-the-horizon radar to measure sea state information, and obtain an echo spectrum containing information on the ocean area to be detected;

[0038] Step 2, performing smoothing preprocessing on the echo spectrum obtained in step 1 by using a multi-scale filtering method to obtain a smoothed preprocessed echo spectrum;

[0039] Step 3, using the method of ridge detection to detect the smooth preprocessed echo spectrum obtained in step 2, and obtain the detection result including the Bragg peak;

[0040] Step 4, using the corrosion method in the image morphology to filter out the interference target in the detection result including the Bragg peak obtained in step 3, and use the result after f...

specific Embodiment approach 2

[0063] Specific embodiment two, combine figure 2 Describe this specific embodiment, based on the identification method and system of a high-frequency first-order Bragg peak and its split spectrum peak described in the first embodiment, a high-frequency first-order Bragg peak and its split spectrum peak, It includes a peak detection module 2 and an alternative result feature confirmation module 3, and it also includes a trend information extraction module 1 and a split spectrum peak identification module 4, and the trend information extraction module 1 is composed of a multi-scale filtering unit 11, a ridge detection unit 12 and Morphological filtering unit 13 is formed; split spectrum peak recognition module 4 is made up of split spectrum peak recognition unit 41, split spectrum amplitude difference confirmation unit 42, split spectrum symmetry matching unit 43 and fuzzy split spectrum feature confirmation unit 44, and the multi-scale filtering unit 11 The input end of the in...

specific Embodiment approach 3

[0064] Specific embodiment three, the difference between this specific embodiment and the identification method and system of a high-frequency first-order Bragg peak and its split spectrum peak described in specific embodiment two is that it also includes a blind spot detection module 5 and an SNR confirmation module 6 and global feature confirmation module 7, the input end of described blind area detection module 5 is connected with the output end of fuzzy split spectrum feature confirmation unit 44; The output end of blind area detection module 5 is connected with the input end of SNR confirmation module 6, and SNR confirmation module The output terminal of 6 is connected with the input terminal of the global feature confirmation module 7.

[0065] The invention is a knowledge-based identification method for the first-order Bragg peak in the high frequency band and its split spectrum peak. The identification process of this method consists of the following five modules: tren...

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Abstract

The invention provides a method and system for recognizing a high-band first-order Bragg peak and a split spectrum peak thereof, and relates to a method and system for recognizing a first-order Bragg peak and a split spectrum peak thereof, which solves the problems that a convention method easily generates bad recognition effect of the Bragg peak, low measurement precision and unavailable recognition of the split spectrum peak under complicated clutter / target background and variable marine environment. The method comprises the following steps of: extracting trend features of the first-order Bragg peak by a method for detecting multi-scale filtering and ridge features, recognizing the Bragg peak by combining overall features of amplitude, continuity, symmetry and the like, and recognizing features of a Bragg split spectrum peak caused by severe-shear ocean currents. The system is used for calculating trend information by a trend information extraction module first, constructing a detection band by combining the ocean currents, extracting peak values and recognizing the split spectrum peak by a split spectrum peak recognition module. The method and the system are suitable for obtaining the ocean information in ocean environment sensing, and the process of rejecting ocean clutters in the target detection.

Description

technical field [0001] The invention relates to a method and system for identifying a first-order Bragg peak and its split spectrum peak. Background technique [0002] In the remote sensing application of the sea state environment, the high-frequency over-the-horizon radar mainly obtains sea state information through the identification of the first-order and second-order ocean echoes and the parameter estimation of the Doppler spectrum. On the other hand, in the process of detecting moving targets such as ships and icebergs, when the speed of the target is equal to or close to the position of the first-order sea clutter spectrum (Bragg peak), it is often caused by the inability to accurately distinguish the target from the sea clutter. False and missed alarms. It can be seen that the realization of Bragg peak identification in the environment of interference pollution is the key to solve the above problems. [0003] Generally, for the sea area at a medium / near distance fro...

Claims

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Application Information

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IPC IPC(8): G01S7/40
Inventor 李杨张宁郝松
Owner HARBIN INST OF TECH
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