Coherent logarithmic normal distribution radar clutter real-time simulation method and system

A log-normal distribution, real-time simulation technology, applied in the field of radar, can solve problems such as real-time difficulty in meeting real-time radar parameters and clutter scene changes

Active Publication Date: 2020-05-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0003] At present, most radar clutter simulations are implemented based on software platforms, and some radar hardware simulators are generated based on the playback of clutter stored in pre-simulated software. Its real-time performance is difficult to meet the needs of real-time radar parameters and clutter scene changes.

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  • Coherent logarithmic normal distribution radar clutter real-time simulation method and system
  • Coherent logarithmic normal distribution radar clutter real-time simulation method and system
  • Coherent logarithmic normal distribution radar clutter real-time simulation method and system

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Embodiment Construction

[0048] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation methods and accompanying drawings.

[0049] The specific implementation process of the coherent lognormal distribution radar clutter (desired clutter) satisfying radar parameters and environmental parameters by real-time simulation of the present invention is as follows:

[0050] Step 1: Preset the sine lookup table for generating expected clutter, the logarithm square root function lookup table (r, A(r)), the spectral width-shape parameter and filter coefficient mapping table (f i ,ρ j ) → h t , Exponential function lookup table;

[0051] Step 2: Assuming that the m-sequence is 16 levels and two orthogonal paths are generated, the primitive polynomials that can be selected are:

[0052]

[0053] The initial state can be set to:

[0054] Under the control of the s...

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Abstract

The invention discloses a method and system for real-time simulation of coherent logarithmic normal distribution radar clutter, which belongs to the field of radar technology and is used to solve the problem of generating radar clutter based on software platform realization or playback of clutter based on storage pre-software simulation It is a technical problem that makes its real-time performance difficult to meet the needs of real-time radar parameters and clutter scene changes. The invention generates white noise through a digital circuit, solves complex mathematical operations and transformations by establishing a function lookup table, and establishes the shape parameter, spectral width and filter coefficient by discretizing the shape parameter range and spectral width range of the expected clutter Based on the mapping relationship, the real-time filter coefficients are obtained based on the table lookup method, and the clutter spectrum matched filter with variable parameters is obtained, and then the coherent lognormal distribution radar clutter that meets the radar parameters and environmental parameters is generated, and the coherent logarithmic normal distribution is realized. Real-time simulated generation of state-distributed radar clutter.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to the real-time simulation of radar clutter (including ground and sea clutter, etc.). Background technique [0002] In all stages of design and development of modern radar systems, radar performance and indicators need to be tested. However, if all field tests are used, it will consume a lot of manpower, material resources, and financial resources, and will be easily affected by the external environment, prolonging the development cycle. The rapid development of electronic technology and computer technology makes the simulation test in the inner field possible, which effectively makes up for the shortage of the radar field test. Among them, clutter is an important part of the radar environment. The analysis of a large number of actual measurement data of ground and sea clutter shows that under the condition of high sea conditions or high-resolution radar clutter has a long tail and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40
CPCG01S7/4052
Inventor 江朝抒欧阳帆郭细根
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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