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Multiple-input multiple-output synthetic aperture ladar system and system design method thereof

A synthetic aperture laser, multi-transmit and multi-receive technology, applied in the field of communication, can solve the problems of limited surveying and mapping bandwidth, restricting the practical application of the SAL system, and narrowing the surveying and mapping bandwidth.

Inactive Publication Date: 2015-09-09
XIDIAN UNIV
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Problems solved by technology

[0003] The research on SAL technology has been included in the development plan of the national high-resolution earth observation. The Key Laboratory of Radar Signal Processing and National Defense Science and Technology of Xidian University found in the research that the single-transmit and single-receive SAL under the high-resolution system, Its mapping bandwidth is extremely limited
Foreign research on SAL systems has carried out airborne flight tests of single-engine and single-receive SAL, and its surveying and mapping bandwidth is only 2 meters at a distance of one kilometer. Practical

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[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] An embodiment of the present invention provides a multiple-transmission and multiple-retraction synthetic aperture laser radar system. The multiple-transmission and multiple-retraction synthetic aperture laser radar system at least includes: a convex lens and a plurality of array elements, and the multiple array elements are located at the focal point of the convex lens. The plane is evenly placed along the azimuth direction, and the array elements are m...

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Abstract

The embodiment of the invention provides a multiple-input multiple-output synthetic aperture ladar (SAL) system and a system design method thereof, which can meet high resolution wide swath measurement requirements. The method comprises the steps of: setting a convex lens on a moving aerial carrier, and uniformly arranging a plurality of array elements on a focal plane of the convex lens in azimuth; the plurality of array elements emitting detection signals and receiving target echo signals refracted by the convex lens; and determining an SAL image in dependence on the target echo signals received by the plurality of array elements.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a multi-transmission and multi-reception synthetic aperture laser radar system and a system design method thereof in the technical field of radar digital signal processing. The invention can be used for high-resolution and wide-swath synthetic aperture lidar imaging. Background technique [0002] High-resolution earth observation requires higher resolution, longer observation distance, and larger mapping bandwidth, and it is developing towards the direction of multiple sensors working together. Synthetic Aperture Lidar (SAL) and microwave synthetic aperture Radar (Synthetic Aperture Ladar (SAR) has good complementary advantages. SAR can be used for census of large-scale areas, but for interested target facilities, SAL can be used for higher-resolution observations. The resolution is a necessary supplement to the means of earth observation. The use of SAL technology c...

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Application Information

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IPC IPC(8): G01S17/89
CPCG01S7/4811G01S7/4815G01S17/90
Inventor 唐禹秦宝汪路锋邢孟道
Owner XIDIAN UNIV