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Double-base forward-looking SAR semi-physical simulation device and method

A semi-physical simulation and bi-base forward-looking technology, applied in the radar field, can solve problems such as slow calculation speed, high cost, and high risk, and achieve the effect of avoiding experimental expenses and improving debugging efficiency

Active Publication Date: 2019-11-22
AEROSPACE SCI & IND MICROELECTRONICS SYST INST CO LTD
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Problems solved by technology

However, the calculation speed of matlab software is slow, and the direct development of the bistatic forward-looking SAR imaging system for the actual measurement of the flying experiment is costly and risky. Therefore, it is necessary to design a bistatic forward-looking SAR semi-physical simulation method and device to reduce the cost Cost and risk of bistatic forward-looking SAR imaging system development and imaging algorithm engineering optimization

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  • Double-base forward-looking SAR semi-physical simulation device and method
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  • Double-base forward-looking SAR semi-physical simulation device and method

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] like Figure 4 Shown, the bistatic forward-looking SAR hardware-in-the-loop simulation method of the present invention:

[0032] (1) In the general-purpose computer, the radar echo simulation data and bibase motion state parameter data for imaging and drawing are prepared.

[0033] The data source can be the way of the bistatic forward-looking SAR flying experiment. The bistatic forward-looking SAR radar echo and status data are recorded in real time by the bistatic forward-looking SAR echo acquisition and recording system mounted on the bistatic carrier aircraft during the air test. Or carry out algorithm simulation based on the actual operating configuration of the bistatic forward-looking SAR, and simulate and generate radar echo simulation data that can be used for imaging and mapping of the bistatic forward-looking SAR system. Echo and status data format ...

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Abstract

The invention relates to the technical field of radars and discloses a double-base forward-looking SAR semi-physical simulation device and method. The method is characterized in that firstly, an echoand state signal simulator based on ZYNQ and a digital-to-analog converter is designed, and echo and state data input is provided for a double-base forward-looking SAR imaging system; secondly, a logic module for synchronously receiving and transmitting echo and state data is designed in the ZYNQ to ensure that the echo and state data can be transmitted to an imaging system in a one-to-one correspondence manner, so the data flow of the imaging system is simplified; thirdly, an FPGA-based echo and state data receiving and packaging module is designed; and lastly, a data cycle sending module isdesigned based on the FPGA to ensure that the DSP can perform signal processing in an assembly line mode. The method is advantaged in that the aim of carrying out hang flight equivalent verification on the hardware double-base forward-looking SAR imaging system in a laboratory is fulfilled, large-scale outfield hang flight experiment expenditure is avoided, moreover, debugging efficiency of the double-base forward-looking SAR imaging system is further improved by operating in a laboratory.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a bistatic forward-looking SAR semi-physical simulation method and device. Background technique [0002] The bistatic forward-looking synthetic aperture radar (SAR) is a member of the active imaging radar family. Compared with the monostatic SAR, the bistatic forward-looking SAR with separate transmitter and receiver has the ability to obtain the non-backscatter coefficient of the target area. The function can obtain images of different viewing angles of the target area, which is beneficial to improve the performance of target recognition in the post-stage image processing. In addition, bistatic forward-looking SAR can also adopt the actual working mode of sending far away and receiving near. Compared with the first equidistant mode of single-base SAR, the signal of the same energy can irradiate the target at a farther distance, thereby improving the dual-base SAR. Base forward-lo...

Claims

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Application Information

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IPC IPC(8): G01S13/90G01S7/292
CPCG01S7/2923
Inventor 武春风白明顺刘洋陈黎王晓丹蒲季春吴婷婷
Owner AEROSPACE SCI & IND MICROELECTRONICS SYST INST CO LTD
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