Satellite antenna directional diagram function fitting method based on moving least square

A least square method and antenna pattern technology, applied in the field of wireless communication, can solve the problems of not reflecting the relationship of antenna gain, inconvenient engineering application, etc., and achieve the effect of easy implementation and high precision

Inactive Publication Date: 2017-11-24
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, the measurement data is discrete, limited, and sampling, and can only reflect the relationship between some specific orientation and gain, and cannot reflect the relationship between arbitrary orientation and antenna gain, which brings inconvenience to some engineering applications

Method used

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  • Satellite antenna directional diagram function fitting method based on moving least square
  • Satellite antenna directional diagram function fitting method based on moving least square
  • Satellite antenna directional diagram function fitting method based on moving least square

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Embodiment Construction

[0047] Such as figure 1 Shown, a kind of satellite antenna pattern function fitting method based on moving least square method of the present invention comprises the following steps:

[0048] (10) Acquiring database: After the satellite is put into use, the antenna gain and pointing information is calibrated to realize the correspondence between a specific pointing point and gain, and the database of antenna gain and pointing mapping is obtained.

[0049] Described (10) obtaining database step comprises:

[0050] (11) Measurement and calibration: After the satellite is put into use, the antenna gain is measured and calibrated regularly to ensure the real-time and accuracy of the antenna gain;

[0051] (12) Forming a database: associating the obtained antenna gain with the specific pointing information for obtaining the gain, forming and storing a database of the relationship between the antenna gain and pointing.

[0052] (20) Fitting function by moving least squares method:...

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Abstract

The invention discloses a satellite antenna pattern function fitting method based on the moving least squares method, which comprises the following steps: obtaining a database of antenna gain and pointing phase mapping; according to the obtained database, applying the moving least squares method for fitting to obtain the antenna The fit function for the orientation map. The antenna pattern function fitting method of the present invention is simple to implement and has high fitting precision, and the obtained fitting function can realize the correlation between any orientation and the antenna gain.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a function fitting method of a satellite antenna pattern based on a moving least square method. Background technique [0002] For the spaceborne multi-beam antenna, the antenna pattern of the spot beam has been set during the antenna design, which can be expressed by a function expression. For example, in the multi-beam antenna composed of the phased array antenna, the The shape, number and arrangement of array elements, array element spacing, and array element amplitude weighting are used to simulate the function reflecting the characteristics of the phased array antenna pattern. However, in practical applications, the expression of the antenna pattern function cannot fully reflect the relationship between antenna gain and direction, and there will be certain errors. Therefore, after the satellite is put into use, the relationship between antenna gain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18
CPCG06F17/18
Inventor 张更新钟锡健曲至诚
Owner NANJING UNIV OF POSTS & TELECOMM
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