雾霾天气下卫星信道三状态Markov模型研究

发布时间：2018-01-06 03:17

本文关键词：雾霾天气下卫星信道三状态Markov模型研究　出处：《系统仿真学报》2017年05期 　论文类型：期刊论文

【摘要】：为准确反映雾霾天气对卫星信道统计特性的影响,将雾霾天气划分为雾状态、雾霾混合状态和霾状态,分别用Rice模型、Corazza模型和Suzuki模型进行描述;根据雾霾天气状态间的转换关系,建立了雾霾天气下卫星信道三状态Markov模型;以定义的联合电平通过率、平均衰落持继时间及联合电平通过率的相对误差为性能指标进行了仿真验证。仿真结果表明,与雾霾天气下卫星信道单状态和两状态模型相比,卫星信道三状态Markov模型能更好地描述卫星信号的衰落特性,更加贴近实际。
[Abstract]:In order to accurately reflect the influence of haze weather on the statistical characteristics of satellite channels, the haze weather is divided into fog state, haze mixed state and haze state, and the Rice model is used respectively. Corazza model and Suzuki model are described; According to the conversion relationship between haze weather states, the three-state Markov model of satellite channel under haze weather is established. The performance index of the defined joint level pass rate, the average fading duration and the relative error of the joint level pass rate are taken as the performance indicators. The simulation results show that. Compared with the single-state and two-state model of satellite channel in haze weather, the three-state Markov model of satellite channel can better describe the fading characteristics of satellite signal and be closer to the reality.
【作者单位】：南京信息工程大学电子与信息工程学院;江苏省大气环境与装备技术协同创新中心;
【基金】：国家自然科学基金(61673222,61371131) 江苏省高校自然科学研究重大项目(13KJA510001) 江苏高校品牌专业建设项目(PPZY2015B134)
【分类号】：TN927.2
【正文快照】： 引言1随着卫星通信技术的不断发展,人们对通信质量的要求越来越高。在卫星通信系统中,信道传播特性直接影响着系统的通信质量。因此,在卫星通信系统研究中,分析信道传播特性,建立贴近实际的信道模型十分必要。目前,在卫星信道建模研究中,主要考虑卫星及接收终端不断移动导致信

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