Method for estimating far-field interference signal intensity of same-orbit multi-satellite distributed array antenna

Abstract

The invention discloses a method for estimating far-field interference signal intensity of a same-orbit multi-satellite distributed array antenna. The method comprises the following steps of: carrying a same-frequency and same-polarization satellite-borne phased-array antenna unit on each satellite of a distributed satellite group; respectively calculating the far-field signal intensity of a signal transmitted by each satellite-borne phased-array antenna unit at a ground user by integrating the influence of incoherent synchronization conditions such as atmospheric turbulence, antenna pointing error, random fluctuation of transmitting power and gain and the like; calculating the interference condition of the signal transmitted by each satellite-borne phased-array antenna unit at the ground user; and analyzing the comprehensive influence of the incoherent condition on the far-field interference signal intensity of the distributed array antenna. According to the method, the influence of the incoherent synchronization condition on the far-field signal of each satellite-borne phased-array antenna unit is comprehensively considered, the provided interference model better conforms to the actual signal interference result, the analysis of far-field interference of a plurality of satellite-borne phased-array antenna units is supported, the method is suitable for spatially distributed satellite groups of different scales, and the calculation process is relatively simple.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and in particular relates to a method for estimating the strength of far-field interference signals of co-orbit multi-satellite distributed array antennas. Background technique [0002] In the future, the demand for satellite communication will continue to develop towards larger capacity and higher speed, which puts forward higher requirements for the antenna gain capability of high-throughput satellites. According to the antenna theory, in order to increase the antenna gain, increasing the antenna aperture is an effective way, and increasing the antenna aperture mainly includes the use of large reflector antennas, centralized array antennas and distributed array antennas. Due to the limitations of satellite carrying capacity, platform capability, and surface accuracy, there are upper bounds on the improvement of antenna gain by large-aperture reflectors and centralized array ante...

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Problems solved by technology

Chinese patent CN104537202 proposes a satellite formation-based cooperative space antenna array synthesis method, establishes a GEO satellite formation signal cooperative reception model, and analyzes the influence of time difference and frequency difference, but the above research only considers the cooperative communication of 2 satellites, And the effects of atmospheric turbulence, random fluctuations and pointing errors are not analyzed

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