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Generation method of coherent clutter based on independent control of amplitude phase

A generation method and independent control technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as large amount of calculation, inaccurate clutter, etc., and achieve the effect of small amount of calculation

Inactive Publication Date: 2011-09-07
HARBIN INST OF TECH
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Problems solved by technology

[0006] In order to solve the problem of large amount of calculation and inaccurate clutter generated by the existing non-Gaussian coherent clutter simulation method, a coherent clutter generation method based on amplitude and phase independent control is proposed

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  • Generation method of coherent clutter based on independent control of amplitude phase
  • Generation method of coherent clutter based on independent control of amplitude phase
  • Generation method of coherent clutter based on independent control of amplitude phase

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Embodiment Construction

[0016] A method for generating coherent clutter based on amplitude and phase independent control described in this embodiment, the specific steps are:

[0017] The first step: express the coherent clutter u+jv as Ae jφ , where A is the magnitude, φ is the phase, and the magnitude A and e jφ is independent;

[0018] The second step: according to the autocorrelation function r of the predetermined magnitude A A (k), the probability density function f is generated by a non-coherent clutter generation method A (a) magnitude sequence A;

[0019] Step 3: According to the autocorrelation function r of the given coherent clutter uu (k)-jr uv (k) and the autocorrelation function r of the magnitude given in the second step A (k), calculate e jφ The autocorrelation function r cc (k)-jr cs (k), and according to the relational expression of the derived phase input and output autocorrelation function, the sequence e of the phase is produced by the zero memory nonlinear transformati...

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Abstract

A generation method for coherent clutter based on independent control of amplitude phase is disclosed, relating to the simulation field of radar system. The invention solves the problem that the calculation amount is large and the generated clutters are inaccurate in the process of generating the clutters by using a non-gaussian coherent clutter analog method, and provides a generation method forcoherent clutter based on independent control of amplitude phase. The method comprises the steps: representing the coherent clutter u+jv as Ae<j phi>, wherein, A is the amplitude and the phi is the phase; in accordance with an autocorrelation function rA(k) of the selected amplitude A, generating an amplitude sequence A of a probability density function fA(a) by means of a non-coherent clutter generation method; in accordance with an autocorrelation function ruu(k)-jruv(k) of the coherent clutter and the autocorrelation function of the given amplitude, calculating an autocorrelation function rcc(k)-jrcs(k) of e<j phi>, outputting the relationship formula of the autocorrelation functions in accordance with input of the deducted e<j phi>, and generating the e<jphi> by means of a zero-memory nonlinear transformation method; multiplying the A by the e<j phi> and controlling the generated coherent clutter Ae<j phi>. The invention can be applied to the simulation field ofthe radar system.

Description

technical field [0001] The invention belongs to the field of radar system simulation, and in particular relates to a method for generating coherent clutter based on amplitude and phase independent control. Background technique [0002] When the radar detects the target, the scattering of the radar signal is the main physical phenomenon, which includes two aspects of the target signal and clutter. For a given object, according to the different functions of the radar, its scattered signal can belong to the target signal or clutter. Scattering signals of objects on the ground are clutter for air defense radars, and target signals for ground mapping radars; cloud and rain echoes are target signals for weather radars, but clutter for other radars. Therefore, we often refer to the uninteresting echoes received by the radar in its environment as clutter. [0003] Early radars were non-coherent radars, and the clutter in their echoes was non-coherent clutter. This kind of non-cohe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
Inventor 谢俊好赵佳博
Owner HARBIN INST OF TECH
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