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MIMO technology-based high-resolution sector-scanning imaging method

An imaging method and high-resolution technology, applied in the field of array imaging, can solve the problem of not controlling the size of the array, and achieve the effect of increasing the frequency of the transmitted signal

Inactive Publication Date: 2014-04-02
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned earlier, traditional SIMO arrays face many limitations in improving azimuth resolution, and researchers of MIMO arrays have not taken control of array size as a consideration

Method used

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  • MIMO technology-based high-resolution sector-scanning imaging method
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  • MIMO technology-based high-resolution sector-scanning imaging method

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Embodiment Construction

[0033] Main content of the present invention has:

[0034] 1. Using MIMO arrays can obtain the advantages of virtual array elements to design imaging arrays, doubling the azimuth resolution without increasing the array size and increasing the signal frequency.

[0035] 2. The beam patterns of the MIMO array and the SIMO array with the same size are given by computer numerical simulation, and the MIMO array has a higher azimuth resolution from the perspective of the main lobe width of the beam pattern.

[0036] 3. The two-dimensional sector-scan imaging results of the MIMO array and the SIMO array with the same size are given by computer numerical simulation, and the imaging results prove that the MIMO array has a higher azimuth resolution.

[0037] The technical solution adopted by the present invention to solve the existing problems can be divided into the following 5 steps:

[0038] 6) Design an imaging array that doubles the azimuth resolution without increasing the array si...

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Abstract

The invention provides an MIMO (Multiple-Input Multiple-Output) technology-based high-resolution sector-scanning imaging method. The advantage that an MIMO array can obtain a virtual array element is utilized to design an imaging array, and the azimuth resolution is multiplied under the premise of not increasing the dimension of the array and improving the signal frequency; beam patterns of both the MIMO array and an SIMO (Single-Input Multiple-Output) array which are in the same size are provided through computer digital simulation, the MIMO array is higher in the azimuth resolution stated in the sense of the main lobe widths of the beam patterns; and the two-dimensional sector-scanning imaging results of both the MIMO array and the SIMO array which are in the same size are provided through computer digital simulation, and the imaging results testify that the MIMO array is higher in the azimuth resolution. By adopting the method provided by the invention, the azimuth resolution 2 times of that of the SIMO array can be obtained under the premise that the MIMO array and the SIMO array are in the same size.

Description

technical field [0001] The invention relates to an array imaging method. Background technique [0002] In the fields of array imaging such as underwater acoustic imaging, radar imaging, and medical imaging, sector scan imaging is one of the widely used working methods. A typical sector-scan imaging system consists of a transmitting array element and a receiving line array. A single pulse emitted by the transmitting element can irradiate an area. The receiving line array performs multi-beam formation on the echo, and extracts the output intensity of each beam to obtain a two-dimensional scattering intensity map of the area. (Sutton J L, Underwater acoustic imaging, Proceedings of the IEEE, 1979; 67(4): 554-566. Bao Z, Xing M D and Wang T, Radar imaging technique, China: Publish House of Electronics Industry, 2005. Makovski A, Ultrasonic imaging using arrays, Proceedings of the IEEE, 1979;67(4):484-495.). [0003] For a typical sector-scan imaging system, the imaging quali...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/89
Inventor 孙超刘雄厚卓颉郭祺丽
Owner NORTHWESTERN POLYTECHNICAL UNIV