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Two-dimension angle calculation method based on distance and carrier phase difference

A two-dimensional angle and distance technology, applied in the field of radio measurement, which can solve the problems of large system error and large amount of calculation.

Active Publication Date: 2014-11-19
XIAN INSTITUE OF SPACE RADIO TECH
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AI Technical Summary

Problems solved by technology

[0008] This type of method assumes that the incident wave is a plane wave, and has high accuracy and resolution when measuring the angle of a long-distance target. When it is applied to the angle measurement of a short-distance target, the algorithm itself will introduce a large systematic error.
At the same time, this kind of method has a very large amount of calculation, which is not suitable for application scenarios with severely limited processor and memory resources, such as relative angle measurement between aircraft in deep space exploration.

Method used

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  • Two-dimension angle calculation method based on distance and carrier phase difference
  • Two-dimension angle calculation method based on distance and carrier phase difference
  • Two-dimension angle calculation method based on distance and carrier phase difference

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Embodiment 1

[0065] The following conditions are known:

[0066] 1) The target to be measured transmits a single-frequency signal to the angle-measuring antenna array. The received signal phase difference is Δp in turn y1-00 =-0.9116, Δp y2-00 =2.9246, Δp y2-y1 =-2.1837, Δp z1-00 =1.9097, Δp z2-00 =-1.0150, Δp z2-z1 =-1.2721, Δp y1-z1 =2.4470, Δp y2-z2 =2.1898, the unit of phase difference is radian;

[0067] 2), 00, y1, y2, z1, z2 array element coordinates are (x 00 ,y 00 ,z 00 ) = (0, 0.1249, -0.1249), (x y1 ,y y1 ,z y1 ) = (0, 0.0096, -0.1249), (x y2 ,y y2 ,z y2 )=(0, -0.1249, -0.1249), (x z1 ,y z1 ,z z1 ) = (0, 0.1249, -0.0096), (x z2 ,y z2 ,z z2 )=(0, 0.1249, 0.1249), the coordinate component unit is meter;

[0068] 3), the distance from the target P to the antenna array is R=5, and the unit of the distance is meters;

[0069] 4), Angle measurement range of azimuth and pitch angle [amin α , amax α ] = [-0.1745, 0.1745], [amin β , amax β ]=[-0.1745, 0.1745],...

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Abstract

The invention relates to a two-dimension angle calculation method based on distance and carrier phase difference. The method comprises the following steps: (1) constructing a target function for angles to be measured by using three dimensional space coordinates and receipt signal carrier phase difference of an antenna array element and the distance from an antenna array to a target as known parameters and using an azimuth angle and a pitch angle of the target as independent variables; and (2) converting the problem of measurement of to-be-measured two-dimension angles to the problem of searching of the maximum value of the target function for the to-be-measured angles and searching the maximum value so as to obtain values of the azimuth angle and the pitch angle. According to the invention, the values of the azimuth angle and the pitch angle are obtained by searching the maximum value, which enables high precision measurement of the azimuth angle and the pitch angle of a target in a close range to be realized and fuzziness in estimation of space angles to be effectively restrained.

Description

technical field [0001] The invention relates to a two-dimensional angle calculation method based on distance and carrier phase difference, and belongs to the technical field of radio measurement. Background technique [0002] There are two methods for calculating the azimuth and elevation angles used in the two-dimensional radio measurement of the azimuth and elevation angles learned in public publications and public channels: [0003] (1) Interference method [0004] The basic principles of the intervention method are figure 1 Shown: When a plane wave arrives at two antenna elements at a certain incident angle, the plane wave must first arrive at one of the array elements, and then arrive at the other array element. The difference in arrival time results in a phase difference between the received signals of the two antenna elements. The measured After the phase difference, use the relationship between the phase difference and the angle of incidence (In the formula, d is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C1/00G06F19/00
Inventor 严琪杨瑞强张蓬蔡春贵张攀
Owner XIAN INSTITUE OF SPACE RADIO TECH
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