Massive target performance data fast reading and precise interpolation method

A technology of target characteristics and interpolation methods, applied in special data processing applications, electrical digital data processing, instruments, etc., can solve unscientific problems, achieve the effects of improving interpolation accuracy, avoiding large-scale reading, and saving repeated calculations

Inactive Publication Date: 2014-01-22
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

No matter in terms of reading time or memory requirements, these are not allowed and unscientific

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  • Massive target performance data fast reading and precise interpolation method
  • Massive target performance data fast reading and precise interpolation method
  • Massive target performance data fast reading and precise interpolation method

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Embodiment Construction

[0039] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0040] Such as figure 1 As shown, the present invention discloses a method for fast reading and accurate interpolation of massive target characteristic data, the method includes the following steps:

[0041] Step 1. Use Physical Optics (PO) or bouncing ray method to calculate the target's monostatic or bistatic radar cross section (RCS). For the RCS at the frequency endpoint, it is required to store its first-order and second-order derivative information at the same time.

[0042] Taking the bi-station RCS interpolation as an example, it contains five variables (incident elevation angle, incidence azimuth angle, scattering elevation angle, scattering azimuth angle, and irradiation frequency), among which the first four variables are circular, but the irradiation frequency is different. Therefore, the interpolation and extrapolation accuracy ne...

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Abstract

The invention discloses a massive target performance data fast reading and precise interpolation method. The method includes that 1 target double-station radar cross sections are calculated, and first-order and second-order derivative information is required to be stored in the radar cross sections at the frequency end point positions simultaneously; 2 a useful double-station radar cross section range is determined and read according to the target state; 3 interpolation of an incidence pitch angle, an incidence azimuth angle, a scattering pitch angle and a scattering azimuth angle is conducted respectively; 4 data format organizing is conducted on the double-station radar cross sections; 5 double-station data after being organized is sent to a graphics processing unit, and frequency one-dimensional interpolation is conducted; 6 whether the interpolation of the incidence pitch angle, the incidence azimuth angle, the scattering pitch angle and the scattering azimuth angle is conducted is judged; 7 interpolation data generated by the graphics processing unit is sent back to a central processor. By means of a lagrange interpolation method, fast reading of massive target performance data is achieved, large-scale reading of the data is avoided, interpolation precision is improved, and repeated calculation is saved.

Description

technical field [0001] The invention relates to a target electromagnetic scattering characteristic data processing technology, in particular to a method for fast reading and precise interpolation of mass target characteristic data. Background technique [0002] The calculation of broadband radar target characteristic data of electrically large size and complex structure targets is often very time-consuming, so establishing a target characteristic database is a very general solution. Taking the dual station radar cross section (Radar Cross Section, RCS) as an example, at a certain frequency, the incident elevation angle, incident azimuth angle and scattering elevation angle, scattering azimuth angle are sampled at 2° intervals, using double-precision floating-point memory Taking the real part and imaginary part of the dual-station RCS, the required capacity is 90×181×91×181×8×2 / 1024 / 1024 / 1024G≈4G. Considering the target characteristic database of the Ku band (12GHz-18 GHz, w...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 高伟梁子长顾俊王谷
Owner SHANGHAI RADIO EQUIP RES INST
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