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Sea clutter simulation method based on sea wave spectrum model

A simulation method and wave spectrum technology, applied in the field of target detection and sea clutter simulation, can solve the problems of difficult realization, difficult to reflect the details of the sea surface, and increased scattering unit area, and achieve the effect of a simple division method.

Active Publication Date: 2016-03-09
XIDIAN UNIV
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Problems solved by technology

The former division method of scattering units based on range-Doppler is theoretically accurate, but it is more complicated to express these scattering units with mathematical formulas, and the calculation of clutter power requires the calculation of double integrals, which is difficult to implement; the latter is based on the equidistance ring The division method of the scattering unit is relatively simple, but the area of ​​the scattering unit increases with the increase of the distance, and it is difficult to reflect the details of the sea surface, which reduces the credibility of the sea clutter simulation

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  • Sea clutter simulation method based on sea wave spectrum model
  • Sea clutter simulation method based on sea wave spectrum model
  • Sea clutter simulation method based on sea wave spectrum model

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Embodiment Construction

[0030] The present invention combines the Pierson-Moskowitz ocean wave spectrum model based on wind speed to simulate the sea surface, and according to the advantages and disadvantages of various methods for dividing the scattering units on the sea level, proposes a triangular scattering unit division method of equal area, and calculates and superimposes the echo simulation of all the scattering units For sea clutter, the radar operating parameters and environmental parameters, such as antenna height, beam width, and beam-of-sight incident residual angle, were also taken into account in the simulation.

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] refer to figure 1 , the sea clutter simulation method based on ocean wave spectrum model of the present invention, comprises the steps:

[0033] Step 1, establish the wave model of the sea surface.

[0034] Due to wind speed ...

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Abstract

The invention discloses a sea clutter simulation method based on a sea wave spectrum model and mainly solves the problem that it is difficult to reflect wave height details on a sea surface in the prior art. The realization scheme is characterized by 1) establishing the sea surface based on the sea wave spectrum model; 2) determining sea surface range under irradiation of a radar main wave beam; 3) selecting a rectangular frame in the sea surface range, and carrying out discretization on the sea wave in the frame to form a complex surface formed by splicing a plurality of equal-area triangle scattering units; 4) calculating attribute parameters and echo power of each triangle scattering unit; 5) establishing an echo model of the triangle scattering units according to the echo power; and 6) generating echo waves of the triangle scattering units of the sea surface in the rectangular frame according to the echo model, judging radar visibility of the triangle scattering units, calculating and superposing the echo waves of all visible triangle scattering units and generating sea clutter simulation data and analyzing the data. The method improves sea clutter simulation reliability and practicality, and can be used for target detection.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to a sea clutter simulation method which can be used for target detection. Background technique [0002] The simulation technology of radar sea clutter has experienced a process from shallow to deep, from simple to complex, and from coarse to fine. Initially, the sea clutter is regarded as a random sequence with a certain probability density distribution function PDF, and the Monte-Carlo method is used for simulation. The classic statistical models of sea clutter amplitude include Rayleigh distribution, logarithmic normal distribution, Weibull distribution and K distribution. The sea clutter actually encountered not only has the statistical distribution characteristics of the amplitude, but also satisfies a certain correlation, which makes the simulated data satisfy a specific power spectrum characteristic or correlation characteristic and amplitude distribution character...

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/4052
Inventor 罗丰雒梅逸香胡冲张玉祺陈世超何海波任佩李咏
Owner XIDIAN UNIV
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