基于双端截断功率谱密度的扩展Suzuki地面移动卫星信道模型

发布时间：2018-01-29 01:48

本文关键词： 双端截断功率谱密度扩展Suzuki卫星移动信道模型　出处：《北京理工大学学报》2017年03期 　论文类型：期刊论文

【摘要】：为使信道模型能更加准确地反映实际信道传播特性,根据多谱勒扩展功率谱密度在频域上的分布特性,提出一种基于双端截断功率谱密度的扩展Suzuki地面移动卫星信道模型.该模型假设接收信号的功率谱密度在低频段与高频段均被截断,推导其概率密度函数、电平交叉率等统计特性,并与实测数据进行比较.仿真结果表明,相比单端截断模型,该模型能够更好地吻合实测数据,更加准确地反映实际信道传播特性.在某些参数给定的情况下,该模型可以转化为其他窄带卫星信道模型,是一种适用性比较广的卫星信道模型.
[Abstract]:In order to make the channel model more accurate to reflect the actual channel propagation characteristics, according to the distribution characteristics of Doppler spread power spectral density in frequency domain. An extended Suzuki ground mobile satellite channel model based on two-terminal truncated power spectral density is proposed, which assumes that the received signal power spectral density is truncated at both low and high frequencies. The statistical properties such as probability density function, level crossover rate and so on are deduced and compared with the measured data. The simulation results show that compared with the single-end truncation model, the proposed model can better match the measured data. When some parameters are given, the model can be transformed into other narrowband satellite channel models, which is a more suitable satellite channel model.
【作者单位】：北京理工大学信息与电子学院;
【基金】：国家“八六三”计划项目(2012AA01A505) 国家自然科学基金资助项目(61271258,61301089)
【分类号】：TN927.23
【正文快照】： 卫星移动通信是卫星通信与移动通信相结合的产物[1],使得信道表现出卫星信道与移动信道的双重特性.为更好地模拟卫星移动信道,建立合适且精确的信道模型是至关重要的.信道模型可以分为窄带信道模型和宽带信道模型,宽带信道模型的建立基于窄带信道模型,本文重点研究窄带模型.文

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