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Terahertz frequency-modulated continuous wave radar three-dimensional imaging algorithm based on compressed sensing

A frequency-modulated continuous wave, three-dimensional imaging technology, used in radio wave measurement systems, radio wave reflection/re-radiation, instruments, etc., can solve the problems of long scanning time and large sample size, and reduce scanning time and sample size. , the ideal restoration and reconstruction effect

Inactive Publication Date: 2017-10-03
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a terahertz FM continuous wave radar three-dimensional imaging algorithm based on compressed sensing, which solves the problems of long scanning time and large sample size during traditional radar imaging scanning

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  • Terahertz frequency-modulated continuous wave radar three-dimensional imaging algorithm based on compressed sensing
  • Terahertz frequency-modulated continuous wave radar three-dimensional imaging algorithm based on compressed sensing
  • Terahertz frequency-modulated continuous wave radar three-dimensional imaging algorithm based on compressed sensing

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Embodiment

[0044] This implementation example will verify and illustrate the algorithm proposed in the present invention through the actual measurement data of the THz-FMCW radar imaging system.

[0045] In order to verify the THz-FMCW radar three-dimensional imaging algorithm based on compressed sensing proposed in the present invention, a THz-FMCW radar three-dimensional imaging system is used to conduct actual imaging experiments. The operating frequency range of the system is 110GHz-170GHz. The experimental imaging target is a pair of scissors placed at a distance of 0.25m from the scanning plane. The THz-FMCW imaging system emits terahertz frequency-modulated continuous waves for scanning and imaging research. The scanning range of the scanning plane of the imaging system is 151mm×151mm. If the traditional radar 3D imaging algorithm is used, point-by-point scanning needs to be performed under the premise of satisfying the Nyquist sampling law, which consumes a lot of time. In the exp...

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Abstract

The invention discloses a terahertz frequency-modulated continuous wave radar three-dimensional imaging algorithm based on compressed sensing. The terahertz frequency-modulated continuous wave radar three-dimensional imaging algorithm comprises the steps of: firstly, determining a measurement matrix, which determines the size of partial acquired data; secondly reconstructing the partial data by adopting a signal reconstruction algorithm to obtain all signal data; and finally, subjecting the obtained reconstructed signal to a series of three-dimensional imaging, so as to obtain a final three-dimensional imaging result. The terahertz frequency-modulated continuous wave radar three-dimensional imaging algorithm has the advantages of high imaging resolution, short signal acquisition time, high imaging efficiency and the like.

Description

technical field [0001] The invention relates to a radar three-dimensional imaging algorithm, in particular to a three-dimensional imaging algorithm for terahertz frequency modulation continuous wave radar based on compressed sensing. Background technique [0002] Terahertz waves (Tera Hertz, THz) refer to electromagnetic waves with a frequency between 0.1THz and 10THz. It is the last electromagnetic wave band that humans have not yet fully recognized and utilized. Since THz radiation is non-ionizing, it can penetrate substances that electromagnetic waves in other frequency bands cannot penetrate, such as packaging materials, clothes, walls, etc., and its radiation is non-ionizing radiation that is harmless to the human body, so THz imaging technology can be applied to Non-destructive testing and safety inspection and other wide-ranging fields. The wavelength of THz waves is very small, which is conducive to the generation of large-bandwidth signals, and has its special adva...

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Application Information

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IPC IPC(8): G01S13/89G01S7/41G01S13/00
Inventor 吴礼葛玲玉彭树生朱嘉祺许静瑶
Owner NANJING UNIV OF SCI & TECH
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