Joint treatment method and system of static scene and moving object based on satellite-borne MIMO-SAR

A MIMO-SAR, moving target technology, used in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation, etc. Widen the scope and quality, effective detection, timely grasp of the effect

Inactive Publication Date: 2010-06-30
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to have two functions, it is often completed by working mode switching and time-sharing work (changing the system PRF), which cannot comprehensively and timely grasp radar detection information, and is difficult to meet the needs of modern military and civilian use

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  • Joint treatment method and system of static scene and moving object based on satellite-borne MIMO-SAR
  • Joint treatment method and system of static scene and moving object based on satellite-borne MIMO-SAR
  • Joint treatment method and system of static scene and moving object based on satellite-borne MIMO-SAR

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Embodiment Construction

[0042] A joint processing method and system for static imaging and moving target detection and imaging based on spaceborne multiple-input multiple-output synthetic aperture radar (MIMO-SAR) provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] Multiple-input multiple-output synthetic aperture radar (MIMO-SAR) is a new system radar proposed in the past two years. In September 2007, J.H.G.Ender of FANG Laboratory in Germany gave the definition of MIMO-SAR for the first time at the International Radar Conference, thinking that "if a moving coherent MIMO radar uses For the purpose, it is defined as MIMO-SAR” (J.H.G.Ender, MIMO-SAR. International radar conference, IRS07, Cologne, Sept, 2007.).

[0044] figure 1 A static scene model according to an embodiment of the invention is shown. In this example, figure 1 Six static objects are given as the objects of static scene processing in th...

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Abstract

The invention provides a joint treatment method and a system of a static scene and a moving object based on satellite-borne MIMO-SAR, which relates to the technical field of radars. The method comprises the following steps of: receiving echo data, and carrying out signal sorting on the echo of each receiving array element by utilizing the orthogonality of a transmit signal; eliminating the influence of the phase error in an echo signal on azimuth imaging by equivalent phase center error compensation; carrying out data combination and reconstruction on each equivalent phase center error compensated channel signal to obtain multichannel echo data; realizing the high-resolution wide-swath imaging of a static scene by utilizing one of reconstructed multichannel data, and meanwhile, realizing the detection and the imaging on a moving object in a wide swath by utilizing the joint treatment of each channel data. The invention can improve and broaden the range and the quality of satellite-borne synthetic-aperture radar reconnaissance and monitoring by the wide swath and high resolution and can effectively and simultaneously detect and trace the key moving object in the wide swath, thereby providing the guarantee of comprehensively and timely mastering radar detection information.

Description

technical field [0001] The present invention relates to the field of radar technology, and more specifically, the present invention relates to a joint processing method and system for static scene imaging and moving target detection and imaging based on spaceborne multiple-input multiple-output synthetic aperture radar (MIMO-SAR). Background technique [0002] As an all-time, all-weather, wide-range, high-resolution sensor, spaceborne synthetic aperture radar (SAR) has been widely used in many fields such as remote sensing, early warning, reconnaissance, and warning. [0003] However, in traditional single-channel spaceborne SAR, the azimuth resolution and mapping bandwidth are contradictory and restrict each other. To this end, the existing solutions usually use Multiple Phase Centers SAR (Multiple Phase Centers SAR, MPC-SAR), using one transmitting array element and multiple receiving array elements, and replacing time sampling with multiple spatial sampling to reduce the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S7/41
Inventor 王力宝许稼彭应宁王秀坛汤俊
Owner TSINGHUA UNIV
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