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Two-dimensional angle calculating method based on distance and tracking regeneration carrier phase

A carrier phase, two-dimensional angle technology, applied in directions such as direction finders and radio wave director components using radio waves, can solve problems such as large system errors and large amounts of calculation

Active Publication Date: 2012-10-17
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-dimensional angle calculating method based on distance and tracking regeneration carrier phase
  • Two-dimensional angle calculating method based on distance and tracking regeneration carrier phase
  • Two-dimensional angle calculating method based on distance and tracking regeneration carrier phase

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Embodiment 1

[0066] The following conditions are known:

[0067] 1) When the measured target transmits a single-frequency signal to the angle-measuring antenna array, the array elements y1, y2, 00, z1, z2 receive signals and track the regenerated carrier phase p 00 =2.0847,p y1 = 1.1528, p y2 =7.1506e-005, p z1 =-1.2997, p z2 =-2.1579, the unit of tracking regeneration carrier phase is radian;

[0068] 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;

[0069] 3), the distance from the target P to the antenna array is R=5, and the unit of the distance is meters;

[0070] 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], the unit o...

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Abstract

The invention relates to a two-dimensional angle calculating method based on distance and tracking regeneration carrier phase. The method comprises the following steps of: (1) by taking the three-dimensional space coordinates of array elements of an antenna array, the receiving signal tracking regeneration carrier phase of the array elements of the antenna array and the distance between the antenna array and a target as given parameters and taking an azimuth angle and a pitch angle of the target as independent variables, constructing an angle measurement target function; and (2) converting a two-dimensional angle measurement problem into a maximum searching problem of the angle measurement target function, searching the maximum, and thus obtaining an azimuth angle value and a pitch angle value. The method has the advantages that the azimuth angle value and the pitch angle value can be obtained by searching the maximum, high-accuracy measurement of the azimuth angle and the pitch angle of a short-distance target is realized, and the fuzziness of space angle estimation is effectively suppressed.

Description

technical field [0001] The invention relates to a two-dimensional angle calculation method based on distance and tracking regenerated carrier phase, 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 for...

Claims

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Application Information

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IPC IPC(8): G01S3/12
Inventor 严琪杨瑞强张蓬蔡春贵张攀
Owner XIAN INSTITUE OF SPACE RADIO TECH
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