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Compressive sensing radar reconstruction method

A technology of compressed sensing and radar, applied to radio wave measurement systems, instruments, etc., can solve problems such as high computational complexity, slow computational speed, and difficult storage, so as to save storage space, increase reconstruction speed, and reduce complexity Effect

Active Publication Date: 2013-10-23
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

Since the above algorithm steps involve the inclusion of compressed sensing matrices A and A H The matrix-vector multiplication calculation, and the radar image data scale is large, resulting in the large-scale and intensive characteristics of the A matrix, which makes it difficult to store A, and the matrix-vector multiplication calculation has high computational complexity, slow calculation speed, and limited The application of compressive sensing radar in practice

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Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0021] It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. And in the drawings, the shapes or thicknesses of the embodiments may be enlarged, and marked for simplicity or convenience. Furthermore, elements or implementations not shown or described in the drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints.

[0022] In th...

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Abstract

The invention discloses a compressive sensing radar reconstruction method. The method comprises: receiving a target reflection echo in an imaging area and performing non-uniform sampling on echo signals so as to obtain a non-uniform sampling sequence in a discrete form; establishing a compressive sensing radar model through the non-uniform sampling echo sequence; and solving the compressive sensing radar model and reconstructing a target reflection function, wherein the matrix vector multiplication in the procedures of solving the compressive sensing radar model is calculated by means of the non-uniform Fourier transform. By adopting such a method, the complexity of algorithmic reconstruction is effectively reduced and the reconstruction speed of sparse signals is enhanced.

Description

technical field [0001] The invention relates to the technical field of radar in the electronic industry, in particular to a reconstruction method for compressed sensing radar. Background technique [0002] Radar is an electromagnetic sensor used to detect and locate targets and is widely used in civilian and military fields. When a typical radar system works, it first transmits a broadband pulse signal, and then uses a matched filter to compress the received echo signal. However, with the continuous pursuit of high resolution, the traditional radar system is facing some challenges, such as the performance of the existing A / D converter cannot meet the high sampling rate requirements of the high resolution radar system, and the mass data is sent to the memory after sampling. pressure etc. [0003] The Compressive Sensing (CS) theory proposed in recent years shows that exact or approximate reconstruction of sparse signals or data can be achieved from severely undersampled dat...

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Application Information

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IPC IPC(8): G01S7/41
Inventor 洪文田继华孙进平张冰尘
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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