Beam hopping multiple access method for low-orbit satellite constellation

Abstract

The invention relates to a low-orbit satellite constellation-oriented beam-hopping multiple access method. The method comprises the following steps of: constructing a self-similar information source model of a user and a beam-hopping time slot model of a low-orbit satellite constellation; time slots are distributed according to user requirements, and beams corresponding to the user groups are activated; and in the allocated time slot, performing power domain superposition on service flow data of a plurality of users in a beam coverage range by adopting a power domain multiple access method through the activated hopping beam, and sending the service flow data to a low-orbit satellite. And the low-orbit satellites serving as the receiving ends extract the received multiple user signals by adopting an interference elimination method. The utilization rate of resources on the satellite is improved from the two dimensions of time and power; in other words, all the beams do not need to work at the same time, and part of the beams are selected according to needs to send and receive multi-user signals; meanwhile, the service quality of multi-user terminal access is improved; and the requirements of various users are met while resource allocation is dynamically carried out.

Description

technical field [0001] The present invention relates to the technical field of satellite communications, in particular to a beam-hopping multiple access method for low-orbit satellite constellations. Background technique [0002] Satellite mobile communication technology refers to a communication method that uses satellites as relays to realize communication between users. The range of users here includes mobile user terminals and fixed user terminals. Satellite mobile communication technology is developed from traditional satellite fixed communication technology, combined with ground mobile communication technology. The satellite systems used include LEO (Low Earth Orbit, Low Earth Orbit) satellites, MEO (Middle Earth Orbit, Medium Earth Orbit) satellites, HEO (Highly Elliptical Orbit, High Elliptical) satellites, GSO (Geosynchronous Orbit, Geosynchronous Orbit) satellites and the like. In the military field, satellite mobile communication technology is an irreplaceable m...

AI Technical Summary

Problems solved by technology

[0005] However, if a large-scale satellite constellation still uses the traditional multi-beam satellite technology, in the traditional fixed multiple access allocation method, each user terminal has been occupying the channel resources allocated by the low-orbit satellite until there is no business data to be sent. business volume is different

For user terminals with a lot of business data, the channel will be blocked due to traffic overload; for relatively idle users, the channel will waste resources due to idle phenomena

Lack of flexibility to meet existing needs, and the fixed resource allocation method will also cause a certain degree of waste of resources, and cannot make full use of scarce on-board resources

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