双插值拟合的共形电磁矢量传感器阵列解相干

doi:10.12305/j.issn.1001-506X.2022.08.02

Abstract

Abstract:

The conformal electromagnetic vector sensor (CEMVS) array can be attached to the geometric surface of the conformal carrier and has a high degree of distributed freedom. Since the polarization vectors of different sensors in the comformal CEMVS array change with the change of the normal direction of the attached conformal geometric structure, it is impossible to directly use smoothing algorithms to solve the parameter estimation problem of the coherent signal. In this paper, the interpolation fitting method is creatively used to obtain an interpolation sub-array with the same polarization component after virtual translation of the sub-array, and then the interpolation sub-array is employed by the polarization smoothing methods to estimate the target parameters. At the same time, in order to reduce the influence of the interpolation fitting error on the interpolation sub-array data, a double interpolation fitting (DIF) method is proposed to realize echo decoherence and effectively estimate the two-dimensional angle and the two-dimensional polarization angle of the signal respectively. Finally, the interpolation fitting error and decoherence performance of the DIF method are analyzed by numerical results.

Key words: conformal electromagnetic vector sensor array, interpolation fitting, decoherence, parameter estimation

CLC Number:

TN911.7

Yili HU, Yongbo ZHAO, Sheng CHEN, Ben NIU. Decoherence of conformal electromagnetic vector sensor array by double interpolation fitting method[J]. Systems Engineering and Electronics, 2022, 44(8): 2393-2402.

Figures/Tables 10

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Table 1

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References 32

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插值拟合误差	虚拟子阵列序号
插值拟合误差	1	2	3	4	5	6	7
第一次插值拟合误差(×10^－4)	0.433 2	0.434 0	0.435 8	0.438 6	0.442 3	0.447 1	0.453 0
第二次插值拟合误差(×10^－15)	0.434 0	0.435 6	0.435 3	0.434 9	0.436 2	0.433 6	0.435 2

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Decoherence of conformal electromagnetic vector sensor array by double interpolation fitting method

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