流星突发通信信道日变化预测模型

Diurnal Variability Prediction Model of Meteor Burst Communication Channel

流星突发通信不同于传统的通信,其是低速率通信,具有突发、不连续、不定时的特性.因此,流星余迹通信的复杂性要求有必要对其通信信道进行建模.在流星通信链路中,流星的辐射分布、可用流星率和占空比是影响流星通信信道性能的重要参数.流星辐射分布在不同季节不同时间都各不相同,因此准确预测流星通信链路在不同时间的流星辐射分布,从而改变大圆路径上天线的指向,对提高通信速率显得非常重要.同时,准确预测流星突发通信链路上的可用流星率和占空比,有助于准确预测并建立流星突发信道模型.本文分析研究了偶发流星辐射分布建模的发展,建立了偶发流星日心空间和地心空间的几何关系,得到了流星突发通信信道参数预测模型.并将预测模型应用于流星通信链路,预测结果与通信链路观测结果比较一致,为流星通信系统的建立提供了技术支持.

Meteor Burst Communication （MBC） is different from traditional communications. It is a low data rate communication with characteristics of burst, discontinuity and unfixed timing. It is necessary to construct prediction model of MBC channel due to its complexities. The Sporadic Meteor Radiant Distribution （SMRD）, the usable Meteor Rate （MR） and Duty Cycle （DC） are important factors impacting channel of the MBC links. SMRD varies with seasons and time, therefore it is very crucial to accurately predict the SMRD to change the direction of antennae and improve the data rate. Furthermore, the correct model of MBC channel can be constructed if MR and DC are accurately predicted. By investigating the development of the modeling of meteor radiant distributions, the geometry relationship of the heliocentric and the geocentric space of sporadic meteor is constructed. The theoretic prediction models of Meteor Burst Communication （MBC） channel parameters are derived. These models are applied in MBC links. The results predicted by these models have good agreement with observation data. The prediction models of these channel parameters given herein can be helpful to construct meteor communication system.