A method for mitigating interference between ngso systems based on satellite antenna beam pointing optimization
A technology of beam pointing and satellite antenna, applied in the field of low-orbit satellite communication, to achieve the effects of flexible interference avoidance, real and comprehensive resources, and improved frequency compatibility
Active Publication Date: 2022-05-17
BEIJING UNIV OF POSTS & TELECOMM
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[0011] Aiming at the problem of coexistence of the same frequency among the current NGSO constellation systems, the present invention proposes a method for mitigating interference between NGSO systems based on satellite antenna beam pointing optimization, which can effectively slow down the interference between NGSO constellation systems and improve the frequency compatibility between systems. Provides a reference for future frequency sharing between NGSO constellation systems
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[0067] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be further described in detail and in-depth below in conjunction with the accompanying drawings.
[0068] The invention provides a method for mitigating interference between NGSO systems based on satellite antenna beam pointing optimization. Based on optimization theory, the frequency compatibility problem between satellite systems is transformed into a nonlinear multivariate function optimization problem, and then the dynamics of satellite antenna beam pointing are optimized. restricted area. The adaptive adjustment of the satellite antenna beam combined with the dynamic forbidden area makes the interference avoidance more flexible, which is beneficial to the co-frequency coexistence among NGSO constellation systems. The effectiveness of interference mitigation methods based on satellite antenna beam pointing optimization is quantitati...
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The invention discloses a method for mitigating interference between NGSO systems based on satellite antenna beam pointing optimization, belonging to the field of low-orbit satellite communication, and specifically: firstly, constructing an interference scene of a communication link of a disturbed satellite system and an interfering satellite system; and then , the satellite sends satellite signals to the earth station, respectively calculates the power received by the earth station, and further calculates the constraint conditions that the power ratio needs to meet; then, defines the dynamic restricted area where the satellite antenna beam points, constructs the optimization objective function, and satisfies the constraint conditions. The frequency coexistence problem between NGSO constellation systems is transformed into a nonlinear multivariate function optimization problem; finally, the minimum value Γ of the objective function is solved min , as the forbidden angle for the satellite antenna beam pointing. Judging whether the boresight of the interference satellite beam is located in the restricted area, if so, the interference satellite antenna should adjust the beam orientation adaptively to mitigate harmful interference; otherwise, no harmful interference is caused. The invention can improve the frequency compatibility between systems.
Description
technical field [0001] The invention belongs to the field of low-orbit satellite communication, and relates to the problem of frequency compatibility and co-frequency coexistence among large-scale NGSO constellation systems, in particular to a method for mitigating interference between NGSO systems based on satellite antenna beam pointing optimization. Background technique [0002] Because NGSO constellation has the characteristics of large scale, high frequency band, large bandwidth and low delay, and can provide dynamic services around the world, NGSO constellation has become one of the most promising satellite communication technologies at present. Foreign commercial aerospace companies represented by SpaceX and OneWeb have successively launched low-orbit satellite constellations operating in the Ku / Ka frequency band. It is inevitable that multiple systems share the same frequency in the Ku / Ka frequency band. The probability of harmful interference between systems Therefo...
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IPC IPC(8): H04B7/185
CPCH04B7/18519H04B7/1851H04B7/18521Y02D30/70
Inventor 尹良杨若男杨远洲邓力李书芳
Owner BEIJING UNIV OF POSTS & TELECOMM