空间电离介质通信信道建模  

Communication channel modeling in space ionization media

作　　者：吴桐 闫毅 王春梅 

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]中国科学院大学,北京100010

出　　处：《电子设计工程》2018年第4期43-47,51,共6页Electronic Design Engineering

基　　金：国防科工局民用航天专业技术预先研究项目(Y46601C82S)

摘　　要：随着卫星通信距离的不断增加,空间中的电离介质对卫星通信的影响变得越来越大,针对目前将行星际空间和地球电离层中等离子体电离介质分别研究而不能完全体现整个空间电离介质特性及其对通信系统的影响的现状,利用电子密度模型及Savitzky-Golay算法,提出了统一考虑空间中电离介质的研究方法,推导了空间电离介质信道的频率扩展和时延扩展参数,并据此建立了空间电离介质通信信道的衰落模型,该模型考虑了空间电离介质信道整体的幅度闪烁、频率扩展、时延扩展、空间噪声和空间延时,增加了通信信道模型所包含的影响因素,扩大了通信信道模型的适用范围。With the distance of the satellite communication increasing, the influence of the space ionization media on the satellite communication is getting bigger. The research of ionization media of the interplanetary space and the ionosphere is always separated and it cannot fully cover the characteristics of the whole space ionization media and the impact on the communication system. By using the electronic density model and Savitzky-Golay algorithm, a research method of unified space ionization media was proposed. The frequency spread and the delay spread of the space ionization media was derived. Then the fading channel model of space ionization media was built considering the intensity scintillation, frequency spread, delay spread, space noise and delay. The influence factors of the communication channel model were increased and the applicable scope of the communication channel model was enlarged.

关 键 词：空间电离介质 信道建模 Savitzky-Golay算法 衰落信道 

分 类 号：TN927[电子电信—通信与信息系统]