超材料孔径成像雷达的辐射场自由度评价

doi:10.3969/j.issn.1001-2400.2016.06.007

Abstract

Abstract:

There has no complete evaluation system to measure the radiation field of metamaterial imaging radar currently. This paper presents a method of using the first and second cross-correlation statistics of the measurement matrix to assess the degree of freedom of the radiation field, and the reconstruction performance of metamaterial imaging radar is analyzed based on the method. The inaccuracy caused by using only the mean value of measurement matrix cross-correlation is analyzed first. Then the cross-correlation coefficient variance indicator is introduced to develop a new evaluation system. Finally, combined with the compressed sensing theory, the corresponding relationship between imaging reconstruction precision and the two indicators is established through the phase diagram. Simulation results show that our method effectively evaluates the degree of freedom of the radiation field and guides the design of metamaterial imaging radar.

Key words: metamaterial aperture imaging radar, degree of freedom, cross-correlation, compressed sensing, phase diagram

WU Zhenhua;LIU Hongwei;ZHANG Lei;KOU Na. Degree of freedom evaluation in the radiation field for metamaterial aperture imaging radar[J].Journal of Xidian University, 2016, 43(6): 39-44.

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Degree of freedom evaluation in the radiation field for metamaterial aperture imaging radar

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