Space antenna array synthesis method based on satellite formation cooperation

Abstract

The invention provides a space antenna array synthesis method based on satellite formation cooperation, which aims to solve the problem of low signal to noise ratio of single link reception in deep space communication. According to the method, a model which performs signal cooperative reception through formation of GEO satellite is established by a relative movement Hill equation; on the basis of fly-around of a circular formation by double satellites, an orbit is designed, expression formulas of delay difference and frequency difference of two links are offered, and the delay and frequency are compensated. On the basis, SIMPLE related algorithms are researched, two impact factors, residual difference and frequency difference, are added, impact of the two impact factors on phase estimated performance and signal synthesis performance is analyzed, and a reference for length selection of compensation data is provided. The method effectively improves the signal to noise ratio of the link, thereby improving the signal receiving performance of the deep space communication.

Description

technical field [0001] The present invention relates to the technical field of space antenna synthesis, in particular to a space antenna array synthesis method. Background technique [0002] In the process of deep space exploration, deep space communication plays an important role in supporting the development and utilization of space resources, space science and technological innovation. Compared with traditional land communication, underwater and satellite communication, information transmission in deep space environment With a wider coverage, a larger change scale, more environmental constraints, and large-scale characteristics such as space segmentation, time blocking, and energy dispersion, the basic theory and related technologies of deep space communication are facing more challenges. Special difficulty: The extremely long distance of deep space communication causes the radiation energy of the antenna to diverge, resulting in a huge path loss. Compared with the earth...

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Problems solved by technology

[0009] The antenna array technology in the deep space network can use a lot of prior information, not only has a large amount of auxiliary information, but also uses a dedicated multi-channel receiving device, each receiver oscillator uses a unified oscillation source, and there is no frequency difference between signals. However, due to the geographical range of the array, the signal delay between array elements and the complexity of the design, there has been no major breakthrough.

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