Bistatic synthetic aperture radar imaging method based on similar single static equivalence

A synthetic aperture radar, bistatic technology, applied in the direction of radio wave reflection/re-radiation, using re-radiation, measurement devices, etc., can solve complex problems such as solving two-dimensional spectrum

Inactive Publication Date: 2013-04-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to provide a bistatic synthetic aperture radar system imaging method based on similar monostatic equivalence ...

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  • Bistatic synthetic aperture radar imaging method based on similar single static equivalence
  • Bistatic synthetic aperture radar imaging method based on similar single static equivalence
  • Bistatic synthetic aperture radar imaging method based on similar single static equivalence

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Embodiment Construction

[0098] The present invention mainly adopts the method of simulation experiment to verify the feasibility of the scheme, and all steps and conclusions are verified correctly on MATLAB7.0.

[0099] In this embodiment, the transceiver platforms are used to fly in parallel and in the same direction, and the antenna beam speeds of the two platforms are 2100 (meters per second) and 700 (meters per second) respectively. The center frequency of the transmitted signal is 9.65GHz, the pulse repetition rate is 2500Hz, and the time width of the transmitted signal is 2 (microseconds). The total length of the X-axis of the observation area is 1000 meters, and the total length of the Y-axis is 200 meters. There are 15 reflection points distributed in the entire observation area. The distance between two adjacent points is 250 meters, and the distance in azimuth is 100 meters. Reference point A 0 The coordinate of is (0,700).

[0100] The specific implementation steps are as follows:

[01...

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Abstract

The invention discloses a bistatic synthetic aperture radar imaging method based on similar single static equivalence. A double radical sign slant distance of bistatic is equivalent to a single radical sign slant distance of a similar single static, an analytical expression of a two dimensional spectrum of a system is obtained, a solving question of a double radical sign of the bistatic is simplified, mature single static imaging methods are fully used, such as an omega-K (wk) algorithm and a range-Doppler algorithm (RD algorithm), a two dimensional STOLT relation of the system is obtained according to the expression of the two dimensional spectrum, and finally, a two dimensional STOLT interpolation is approximated according to the two dimensional non-uniform Fourier transformation, and imaging of the system is achieved. Therefore, complicated degree of an imaging algorithm of the bistatic is largely reduced, and successive imaging process is facilitated.

Description

technical field [0001] The technical invention belongs to the technical field of radar, and in particular relates to the technical field of Bistatic Synthetic Aperture (BiSAR) radar imaging. Background technique [0002] Bistatic synthetic aperture radar (BiSAR for short) refers to a radar system in which the transmitting and receiving antennas are separated on two different moving platforms. Compared with single-base SAR, bistatic SAR has the advantages of good concealment, high security, strong anti-interference ability, low cost and strong flexibility, and can realize some special modes that single-base SAR cannot achieve, such as forward-looking imaging. Bistatic imaging is a very valuable imaging mode, which can be applied to missile navigation, aircraft navigation and landing in bad weather, etc. In view of the multiple advantages of bistatic SAR, the research on bistatic SAR imaging technology is of great significance. [0003] Although the bistatic SAR has the abo...

Claims

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Application Information

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IPC IPC(8): G01S13/90
Inventor 张晓玲黄欢刘喆
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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