Sea surface large target detection method based on energy median

A detection method and energy technology, which is applied in the field of large target detection, can solve problems such as inability to effectively detect large targets, and achieve the effects of improving estimation accuracy, avoiding overestimation, and suppressing clutter

Active Publication Date: 2021-05-04
XIDIAN UNIV
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Problems solved by technology

For such a large target, when the above-mentioned traditional method selects the reference unit, the reference units around the large target range unit are still the target unit, and the reference unit information cannot be used for clutter suppression, and the target may even be regarded as clutter in the detection removed, resulting in the inability to effectively detect large targets

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  • Sea surface large target detection method based on energy median
  • Sea surface large target detection method based on energy median
  • Sea surface large target detection method based on energy median

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing:

[0033] refer to figure 1 , the implementation steps of the present invention are as follows:

[0034] Step 1, obtain echo data.

[0035] Using the radar transmitter to transmit continuous pulse signals, the radar receiver receives the M×I×N dimensional echo data matrix X, where M represents the number of frames or scans, I represents the number of distance units, and N represents the number of accumulated pulses.

[0036] Step 2, calculate the energy average matrix z.

[0037] For the echo data matrix X along the pulse dimension, calculate the energy average value of the pulse dimension of the echo data matrix X according to the following formula, and obtain the energy average matrix Z:

[0038]

[0039] Among them, X(m,i,n) represents the echo data of the mth row i column n page of the echo data matrix X, |X(m,i,n)| represents the data X(m,i,n) Take the modulus, Z(m...

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Abstract

The invention discloses a fast detection method for large-scale targets on the sea surface based on the median value of energy, which mainly solves the problem that the prior art is not suitable for detecting large-scale targets on the sea surface in a high-resolution mode. The implementation steps are: 1) acquiring echo data; 2) incoherently processing the echo data along the pulse dimension to obtain an energy average matrix z; 3) performing logarithmic transformation on the matrix Z to obtain a logarithmic space matrix 4) using the matrix Find the detection statistic ξ corresponding to the unit d to be detected; 5) Use the matrix to find the detection threshold T corresponding to the unit d to be detected; 6) Compare the size of the test statistic ξ and the detection threshold T to determine whether the target exists 7) Use the detection result to estimate the length and size. The invention improves the detection performance of the radar for large targets and the estimation accuracy of the length and size, and can be used for fast detection and processing of large targets on the sea surface.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a large target detection method, which can be used for estimating the size of large targets on the sea surface. Background technique [0002] The research on target detection method under the background of sea clutter has broad application prospects in both military and civilian fields. Shore-based and airborne radars usually work in high-resolution mode. When the distance resolution reaches the meter or submeter level, islands, reefs, large ships, fishing boats, etc. will occupy multiple distance units. Fast and accurate detection of such large objects is of great significance for subsequent related processing of objects of interest. [0003] Literature He, Y., Guan, J.: Meng, X.W.et al.: 'Radar target detection and CFAR processing', (Tsinghua University Press, 2011, 2st edn.), pp.30-50 and literature Watts, S.: Various energy-based CFAR detection method...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/04G01S7/41
CPCG01S7/414G01S13/04
Inventor 水鹏朗张帅施赛楠
Owner XIDIAN UNIV
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