Space-air-ground integrated terahertz communication channel modeling method

Abstract

The invention relates to the technical field of space-air-ground-sea integrated communication, in particular to a space-air-ground integrated terahertz communication channel modeling method. The modeling method comprises a free space propagation loss module, a cloud attenuation module, a molecular absorption loss module, a rainfall attenuation module, a channel transmission time delay module, a Doppler frequency shift module, a Doppler frequency shift change rate module, a random phase module and a signal impact function generation module. The modeling method provided by the invention covers main factors of the terahertz space-air-ground channel; a space-air-ground terahertz communication channel modeling process is constructed, a step-by-step channel parameter generation method is provided, response data of a dynamic terahertz channel composite attenuation effect under different transmission conditions can be provided, and corresponding transmission technology design suggestions are provided for realizing reliable communication of future space-air-ground integrated terahertz.

Description

technical field [0001] The present invention relates to the technical field of air-space-ground-sea integrated communication, in particular to a modeling method for air-space-ground integrated terahertz communication channel. Background technique [0002] The Internet serves as the cyberspace infrastructure, and emerging satellite companies represented by SpaceX, OneWeb, and O3b are stepping up their global deployment, competing for frequency orbit resources, and building satellite Internet to seize development opportunities. [0003] The terahertz frequency band has the advantages of high frequency, narrow beam, large absolute bandwidth, and large communication capacity. Due to the transition of its location, it has both the properties of electromagnetic waves and light waves, and also has the characteristics of penetration, spectral resolution, time and space coherence. Moreover, compared with wireless optical communication, the beam is wider, the receiving end is easy to...

AI Technical Summary

Problems solved by technology

[0004] However, most of the current research on terahertz channels focuses on outdoor short-distance communication and indoor wireless channel transmission, and there is no in-depth analysis of the satellite-ground wireless communication scenarios in the terahertz frequency band.

Existing studies on terahertz satellite-ground communication channels usually focus on analyzing a single factor that affects the characteristics of terahertz channels, such as atmospheric molecule absorption, rainfall attenuation, etc., without considering the comprehensive influence of multiple attenuation sources that change over time, and lack of systematicness , Modular modeling process and method

In addition, the research on the compound attenuation effect caused by the simultaneous action of atmospheric factors on the channel is mainly concentrated in the microwave and millimeter wave frequency bands, and the research on the terahertz frequency band is not deep enough, and there are not many experimental data.

Images