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Satellite communication system resource scheduling method combining beam hopping and precoding

A satellite communication system and resource scheduling technology, which is applied in the field of joint beam-hopping and precoding satellite communication system resource scheduling, can solve problems such as difficulty in making full use of the advantages of beam-hopping technology, affecting system performance, and co-frequency interference, so as to improve resource utilization. Effect of Utilization and System Capacity

Active Publication Date: 2020-04-10
NANJING UNIV OF POSTS & TELECOMM +1
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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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  • Satellite communication system resource scheduling method combining beam hopping and precoding
  • Satellite communication system resource scheduling method combining beam hopping and precoding
  • Satellite communication system resource scheduling method combining beam hopping and precoding

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with the accompanying drawings.

[0052] Such as figure 1 A satellite communication system resource scheduling method for joint beam hopping and precoding is shown, comprising the following steps:

[0053] Step 1: Establish the objective function of beam-hopping time slot allocation based on service priority as follows:

[0054]

[0055] Meet: R i ≤C i , N i ≥0,N i ∈ integer, K is the total number of beams;

[0056] Among them, C i is the service capacity requirement of each beam, R i is the actual achievable service capacity of each beam, ω i is the weight value of user service priority; N i The number of slots allocated to each beam, is the maximum number of beams that can work simultaneously in one time slot, N t is the total slot length;

[0057] The beam hopping technology uses full frequency multiplexing, which can be obtained as follows:

[0058]

[0059] where SINR i,j is t...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/12H04B7/0408H04B7/0456
CPCH04W72/0446H04B7/0408H04B7/0456H04W72/542H04W72/569
Inventor 张晨赵旭东张更新
Owner NANJING UNIV OF POSTS & TELECOMM
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