Ionosphere phase pollution correction algorithm based on improved PGA
The invention discloses an ionosphere phase pollution correction algorithm based on improved PGA. The algorithm includes at first, performing FFT calculation of the echo data of a distance-azimuth resolution unit and obtaining the frequency spectrum, filtering out the broadening strong Bragg peak by...
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| creator | GAO XUGANG JI ZHENHAI LI WENKUI NING YONG BO CHAO XU QING WU HAO |
| description | The invention discloses an ionosphere phase pollution correction algorithm based on improved PGA. The algorithm includes at first, performing FFT calculation of the echo data of a distance-azimuth resolution unit and obtaining the frequency spectrum, filtering out the broadening strong Bragg peak by means of an adaptive slide window band pass filter, and performing IFFT on the frequency domain data output by the filter, correcting the echo data by means of the data and at the same time setting the threshold according to the mean value of the data, recording the position of the data whose amplitude is below the threshold, and rejecting the data corresponding to the position in the echo data, and at the end, reconstructing the echo data by means of a CS algorithm and obtaining the frequency spectrum. Therefore, the ionosphere phase pollution is corrected, the sea/ground clutter spectrum peak is sharpened, and the noise floor is reduced. As shown by the simulation result, compared with the PGA algorithm, after t |
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The algorithm includes at first, performing FFT calculation of the echo data of a distance-azimuth resolution unit and obtaining the frequency spectrum, filtering out the broadening strong Bragg peak by means of an adaptive slide window band pass filter, and performing IFFT on the frequency domain data output by the filter, correcting the echo data by means of the data and at the same time setting the threshold according to the mean value of the data, recording the position of the data whose amplitude is below the threshold, and rejecting the data corresponding to the position in the echo data, and at the end, reconstructing the echo data by means of a CS algorithm and obtaining the frequency spectrum. Therefore, the ionosphere phase pollution is corrected, the sea/ground clutter spectrum peak is sharpened, and the noise floor is reduced. 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The algorithm includes at first, performing FFT calculation of the echo data of a distance-azimuth resolution unit and obtaining the frequency spectrum, filtering out the broadening strong Bragg peak by means of an adaptive slide window band pass filter, and performing IFFT on the frequency domain data output by the filter, correcting the echo data by means of the data and at the same time setting the threshold according to the mean value of the data, recording the position of the data whose amplitude is below the threshold, and rejecting the data corresponding to the position in the echo data, and at the end, reconstructing the echo data by means of a CS algorithm and obtaining the frequency spectrum. Therefore, the ionosphere phase pollution is corrected, the sea/ground clutter spectrum peak is sharpened, and the noise floor is reduced. 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The algorithm includes at first, performing FFT calculation of the echo data of a distance-azimuth resolution unit and obtaining the frequency spectrum, filtering out the broadening strong Bragg peak by means of an adaptive slide window band pass filter, and performing IFFT on the frequency domain data output by the filter, correcting the echo data by means of the data and at the same time setting the threshold according to the mean value of the data, recording the position of the data whose amplitude is below the threshold, and rejecting the data corresponding to the position in the echo data, and at the end, reconstructing the echo data by means of a CS algorithm and obtaining the frequency spectrum. Therefore, the ionosphere phase pollution is corrected, the sea/ground clutter spectrum peak is sharpened, and the noise floor is reduced. As shown by the simulation result, compared with the PGA algorithm, after t</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING |
| title | Ionosphere phase pollution correction algorithm based on improved PGA |
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