A self-calibration method for the six-dimensional error of the attitude and position of the array element of the electromagnetic vector sensor
An electromagnetic vector and sensor technology, used in radio wave director components, direction finders using radio waves, etc., can solve problems such as large computational complexity of algorithms, achieve system self-calibration, improve computing speed, and expand applicable fields Effect
Active Publication Date: 2019-08-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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The general and fast algorithm for multi-linear decomposition is still under development, and the available algorithm has a large amount of calculation
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[0015] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0016] The direction of electromagnetic wave signal propagation is as figure 1 As shown, the electromagnetic wave spatial arrival direction uses the parameter Represents azimuth angle and elevation angle respectively, -π / 2≤θ≤π / 2, Then the arrival vector is: Use the polarization ellipse descriptor (γ, η) to represent the polarization properties of electromagnetic waves, the polarization angle -π / 2 figure 2 shown. are the long and short axis direction vectors of the electric field polarization ellipse, and the electromagnetic wave structure vector u n , Orthogonal to each other, the wave structure vector can be used as a reference for attitude measurement, and the Cartesian coordinate system formed by the wave st...
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The embodiment of the invention discloses an electromagnetic vector sensor array element attitude and position six-dimensional error correction method, and relates to the field of signal analysis and parameter estimation. A MUSIC algorithm for polarized array DOA estimation can reduce the number of parameters needing to be searched based on the multi-linear relationship of data. Complete electromagnetic information received by an electromagnetic vector sensor under a reference attitude at a single position in a space can be converted into a received signal under any attitude. By use of a polarized array received data multidimensional linear structure, a polarization domain MUSIC algorithm is applicable to frequency-hopping and broadband signals. There is no need for a special calibration signal source. During use of the system, a reference signal is obtained, and the position error parameters of sensors are obtained. The system realizes automatic correction of the six-dimensional space parameter error of array elements. Under the condition of using multiple single-frequency signal sources, a multi-electromagnetic-vector-sensor array is synthesized from single electromagnetic vector sensors by means of quick and slow sampling. The six-dimensional parameters of attitude and position of an aircraft can be measured by mounting the single electromagnetic vector sensors on the aircraft.
Description
technical field [0001] The invention relates to the field of signal analysis and parameter estimation, in particular to a six-dimensional error self-correction method of an electromagnetic vector sensor array element attitude position. Background technique [0002] The original data received by the polarization array of the electromagnetic vector sensor presents a trilinear data structure of time, polarization, and space-frequency phase delay. For any popular array with blind array element positions that lack space-frequency information, multi-target DOA estimation can also be performed with a full aperture. The linear decomposition DOA estimation algorithm can visually verify this conclusion. The general and fast algorithm of multi-linear decomposition is still in development, and the available algorithm has a large amount of calculation. The traditional MUSIC algorithm has been proved to be a reliable high-resolution DOA estimation algorithm. MUSIC can use the trilinear r...
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IPC IPC(8): G01S3/10
Inventor 陈广东黄海行黄雨泽
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS