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LEO satellite channel modeling method and device based on double Markov models

A technology of satellite channel and modeling method, applied in the field of low-orbit satellite communication

Active Publication Date: 2021-03-02
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide the LEO satellite channel modeling method and device based on the dual Markov model, in order to solve the technical problem of how to establish a model more in line with the actual scene of the low-orbit satellite channel in the prior art

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  • LEO satellite channel modeling method and device based on double Markov models
  • LEO satellite channel modeling method and device based on double Markov models
  • LEO satellite channel modeling method and device based on double Markov models

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[0088] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0089] In recent years, low-earth orbit (Low-Earth Orbit, LEO for short) satellite Internet has become the focus of much attention. Compared with Geosynchronous Orbit (GEO) satellites, the LEO satellite network can meet the requirements of small transmission delay, low transmission loss, and high data rate at the same time; compared with ground mobile communications, LEO satellites can be used as an extension of ground communications to meet global Wide area c...

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Abstract

According to the LEO satellite channel modeling method and device based on the double Markov models, the influence of shadow fading on LOS paths under large-scale fading can be reflected through the first-order Markov multi-state channel model; moreover, when the first-order Markov multi-state channel model is in each large-scale fading state, small-scale fading actual measurement data corresponding to a sight distance LOS path under large-scale fading is extracted, and a multi-path dynamic generation and deactivation process under small-scale fading can be reflected, so that the dynamic time-varying requirement of the LEO satellite channel model on a time axis is met, and the dynamics of LEO satellite channel characteristics is met; and moreover, by determining the channel parameters andestablishing the channel parameters required by the complete Rician channel model, the Rician channel model of the LEO satellite is obtained, so that the Rician channel model of the LEO satellite better conforms to the actual scene of the low earth orbit satellite channel.

Description

technical field [0001] The invention relates to the technical field of low-orbit satellite communication, in particular to a method and device for modeling LEO satellite channels based on a double Markov model. Background technique [0002] In communication, channel modeling can abstractly describe the channel with a model, and classify it according to the mathematical characteristics of its input / output signals and the relationship between input / output signals. However, the model established for the channel, such as the Land Mobile Satellite (LMS for short) channel model, is only for the narrow-band high-orbit satellite channel. Wherein, the narrowband high-orbit satellite channel is, for example, a geosynchronous orbit (Geosynchronous Orbit, GEO for short) satellite. [0003] For low earth orbit (Low Earth Orbit, referred to as LEO) satellite channels (which can be called low-orbit satellites), in the LEO satellite channel, due to the high speed of the low-orbit satellite...

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Application Information

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IPC IPC(8): H04B7/185H04B17/391
CPCH04B7/18519H04B17/3912
Inventor 邓中亮刘雯郑奭轩林文亮王珂刘浩于晓艺刘洋
Owner BEIJING UNIV OF POSTS & TELECOMM
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