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Frequency angle two-dimensional mixed interpolation based rainfall particle scattering operation accelerating method

A technology of particle scattering and interpolation method, which is applied in the field of radar, can solve problems such as difficulty in obtaining impedance matrix and induced current vector derivatives, time-wasting, difficulties, etc., and achieve the effects of avoiding singularity problems, saving computing time, and reducing scanning costs

Inactive Publication Date: 2017-01-04
HOHAI UNIV
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Problems solved by technology

However, these methods are also very difficult to apply. When the AWE method is used, it is sometimes difficult to obtain the derivative of the impedance matrix and the induced current vector
The difficulty with the MBPE method is that matrix inversion is required to obtain the coefficients of the surrogate model, resulting in a considerable amount of time wasted in computing the frequency and angular sweeps

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  • Frequency angle two-dimensional mixed interpolation based rainfall particle scattering operation accelerating method
  • Frequency angle two-dimensional mixed interpolation based rainfall particle scattering operation accelerating method
  • Frequency angle two-dimensional mixed interpolation based rainfall particle scattering operation accelerating method

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[0043] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0044] The main ideas of the present invention are: apply the cubic spline algorithm in the angle domain of the induced current in the band of interest (i.e. the target band); apply the Stoer-Bulirsch algorithm in the analysis of the electromagnetic characteristics of the broadband rainfall particle swarm; The technology adopts the layered structure from rough to fine as an iterative process to generate a set of uneven sampling node models to improve computing efficiency.

[0045] An acceleration method for rainfall particle scattering calculation based on two-dimensional hybrid interpolation of frequency and angle, including:

[0046] 1. Applyin...

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Abstract

The invention discloses a frequency angle two-dimensional mixed interpolation based rainfall particle scattering operation accelerating method. A cubic spline interpolation method and Stoer-Bulirsch are combined as a model, a RCS (radar cross section) contains frequency and angle information, and RCS acquisition at frequency and angle zones of interested wave bands is repeated. The method is characterized in that cubic spline interpolation is applied to wide-induced-current angle zones, and Stoer-Bulirsch is applied to wide frequency zones. In order to effectively calculate electromagnetic scattering characteristics and improve operation efficiency of matrix-vector multiplication in an electric field integral equation, SM / CG (sparse matrix / canonical grid) is applied. By adoption of the method, operation time is greatly saved in frequency and angle scanning, and rainfall particle swarm bandwidth scattering operation speed is increased effectively.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to a method for accelerating rainfall particle scattering calculation based on two-dimensional hybrid interpolation of frequency and angle. Background technique [0002] The concept of radar originated in the early 20th century, and it has become an indispensable electronic device in the military field because of its all-weather and all-weather long-distance remote sensing capabilities. With the rapid development of science and technology, radar systems for different application backgrounds have also appeared in various fields of the national economy. As an important branch of weather radar, rainfall radar plays an important role in monitoring and forecasting precipitation, hail and other weather phenomena, and has been highly valued by governments of all countries. Considering the electromagnetic polarization characteristics of rainfall, the scattering of radar beams by rainfall par...

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Application Information

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IPC IPC(8): G06F17/13G06F17/16G06F17/15
CPCG06F17/13G06F17/15G06F17/16
Inventor 陈嘉琪李静林元堃平学伟刘海韵王峰
Owner HOHAI UNIV
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