Satellite communication system resource scheduling method combining beam hopping and precoding

Abstract

The invention provides a satellite communication system resource scheduling method combining beam hopping and precoding. The method comprises the following steps: establishing a beam hopping time slotallocation target function based on service priority; obtaining a time slot allocation optimal solution by using a convex optimization method, and obtaining a time slot allocation matrix of each wavebeam according to the optimal solution; analyzing the time slot allocation result of each wave beam, and finding out the wave beams with serious same-frequency interference according to the same-frequency multiplexing distance; designing precoding of a transmitting end, and performing interference suppression and elimination on beams with same-frequency interference in the beam hopping resource allocation scheme; according to the resource scheduling method provided by the invention, dynamic scheduling of satellite resources is satisfied, performance reduction caused by same-frequency interference is avoided, and the resource utilization rate and the system capacity are improved.

Description

technical field [0001] The invention relates to the technical field of satellite communication, and mainly relates to a satellite communication system resource scheduling method combined with beam hopping and precoding. Background technique [0002] In traditional multi-beam satellite communication systems, resources such as spectrum, power, and time slots allocated to each beam are fixed; however, with the development of satellite And the spatial distribution is also seriously uneven. This kind of fixed resource allocation can easily lead to fragmentation of resource utilization and uneven load among beams. In response to the above problems, beam-hopping technology emerged as the times require. As a key technology for the evolution and leap from high-throughput satellite to very high-throughput satellite technology, it provides a basis for the flexible allocation and efficient utilization of satellite resources. This technology can improve the transmission capacity of the ...

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Problems solved by technology

[0003] However, since the core of beam hopping is business-driven and on-demand coverage, there must be multiple adjacent beams working at "full power and full frequency band" simultaneously in hotspot areas with high business demand, that is to say, there are multiple beams in The working time overlaps and the spatial distance is close, so users of adjacent beams will inevitably encounter severe co-channel interference, which will affect system performance and make it difficult to make full use of the technical advantages of beam hopping

These have brought more stringent challenges to the design based on beam hopping: not only to meet the needs of user business differentiation, adapt to the uneven distribution of business time and space, but also must consider the method of co-channel interference suppression, resource allocation Joint design

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