A sky wave radar island echo detection method
By detecting and extracting island echo data in skywave radar, the problem of lacking island echo detection in existing technologies is solved, and efficient acquisition of frequency-sweeping island echo data is achieved to support island positioning.
CN115718286BActive Publication Date: 2026-07-24SANMENXIA POLYTECHNIC
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SANMENXIA POLYTECHNIC
- Filing Date
- 2022-10-31
- Publication Date
- 2026-07-24
AI Technical Summary
Technical Problem
The lack of effective skywave radar echo detection methods for islands in existing technologies affects the accuracy and reliability of island positioning.
Method used
By removing radio frequency interference and noise from the range-Doppler power spectrum, the Doppler frequency shift of a pair of Bragg peaks of first-order sea clutter is detected, and island echo data located in the middle of the Bragg peaks is extracted. This process is repeated to obtain swept-frequency island echo data.
Benefits of technology
Effective processing of skywave radar frequency sweep detection data was achieved, clear frequency sweep island echo data was obtained, and the real-time performance and accuracy of island positioning were improved.
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Figure CN115718286B_ABST
Abstract
The application provides a sky wave radar island echo detection method, which removes radio frequency interference and noise in a range-Doppler power spectrum, detects Doppler frequency shift of a pair of Bragg peaks of first-order sea clutter in a sea surface echo range-Doppler power spectrum, extracts a column of data located in the middle of the Doppler frequency shift of the Bragg peaks in the sea surface echo range-Doppler power spectrum as island echo data of the detection frequency, and obtains swept island echo data after processing data of all detection frequencies. The method has good real-time performance, can effectively obtain swept island echo data, and the data can be used as input data for island positioning, thereby being applied to engineering practice.
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