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Satellite tracking and angle measuring method based on navigational digital multi-beam receiving array antenna

A digital multi-beam, receiving array technology, applied in the field of satellite tracking angle measurement, can solve the problems of large error of angle measurement algorithm, low signal-to-noise ratio of satellite signal, inconsistent amplitude response, etc. The effect of real-time improvement

Active Publication Date: 2013-04-03
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0005] The main problem of the existing angle measurement method is: when calculating the signal direction of the satellite signal, because the signal-to-noise ratio of the satellite signal is very low, the performance of the algorithm may be low or even invalid; in addition, the phase and amplitude response of the receiving channel of each array element Inconsistency will also lead to greater error or even failure of the angle measurement algorithm

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Embodiment Construction

[0039] The following combines specific implementation steps and figure 1 To further describe the present invention:

[0040] The receiving array antenna used in the present invention is a 4*4 16-element square area array. The angle measurement algorithm uses an L-shaped array composed of two intersecting edges of the square area array. The structure diagram is as follows figure 1 As shown, it is composed of two linear arrays perpendicular to each other, which are X sub-arrays and Y sub-arrays. The element spacing of these two linear arrays is λ / 2, and the sub-array X and the sub-array Y intersect at The entire array refers to the array element, and each element in the two sub-arrays corresponds to a receiving channel.

[0041] The specific steps of the present invention include:

[0042] In step ①, the signal received by the array antenna is down-converted to the intermediate frequency, and the sampled signal obtained by A / D sampling is subjected to quadrature down-conversion of the ...

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Abstract

The invention discloses a satellite tracking and angle measuring method based on a navigational digital multi-beam receiving array antenna. The method is used for computing the incoming wave direction of satellite signals received by the array antenna, and the array antenna adopts an L-shaped array of the digital multi-beam receiving square array antenna. The method includes: firstly, performing branched and synchronous spread spectrum processing for signals received by the array antenna; secondly, performing spatial directional calibration and wired calibration for each channel of the array antenna; and thirdly, obtaining the final signal incoming direction by the aid of obtained despread phase difference data and error matrixes after calibration. The satellite tracking and angle measuring method based on the navigational digital multi-beam receiving array antenna is capable of effectively avoiding the problems of low signal to noise ratio, inconsistency of channel phase response with amplitude response and poor instantaneity resulting in poorer angle measuring performance, and has the advantages of novelty, creativity, simplicity and practicality.

Description

Technical field [0001] The invention relates to a satellite tracking angle measurement method of a satellite navigation receiving device, in particular to a satellite tracking angle measurement method based on a navigation digital multi-beam receiving array antenna. Background technique [0002] At present, array signal processing has been applied to communication, radar, sonar and other systems. It has the characteristics of flexible processing and strong anti-interference ability. The angle measurement method based on array antenna is an important technology in array signal processing. The characteristic of the array antenna lies in the difference in the position of its elements, which results in the phase difference when receiving satellite signals. The angle measurement method based on the array antenna just uses the phase difference of each element of the array antenna when receiving the satellite signal to calculate The azimuth and elevation angle of the satellite. [0003] ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/46G01S19/29G01S19/30
Inventor 魏亮蔚保国段召亮赵胜司东晓
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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