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把地理区域分成一个个小区,蜂窝系统在该区域内提供无线覆盖。把可用的频谱分成很多信道,每个小区分配一组信道。使用频分双工(FDD)。在小区间进行频率利用,N个小区构成一个簇,簇间进行频率复用。定义了传播特性(信道参数)以及同频小区的位置。信道的参数包括:小区半径,路径损耗指数,以分贝为单位的对数正态阴影的标准差,基站发射功率级,移动台发射功率级,每个小区的扇区数,扇区化天线的正反向比,要仿真的瞬时位置的组数,同频干扰阈值。-To a geographical area is divided int
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在低仰角的情况下,海面的杂波振幅特性满足对数正态分布。本程序就产生这样的杂波-At low elevation, the sea clutter amplitude characteristics to meet the lognormal distribution. This procedure resulted in such a clutter
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包含有Rayleigh信道、Rice信道和Lognormal分布的生成函数,以及依次产生具体信道并与理论概率密度分布曲线对比的程序-Contains Rayleigh channels, Rice channels and Lognormal distribution generating function, and in turn produce specific channel and theoretical probability density distribution curve co
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响应面法计算结构的可靠度.已知极限状态方程,变量服从对数正态分布,变量均值和标准差已知。-Response surface methodology to calculate the reliability of structures known to limit state equation, variables lognormal distribution, the mean and the standard deviation is known variables.
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对轨道不平顺的分布采用对数正态分布进行分布拟合-On the distribution of track irregularity conducted using lognormal distribution fitting
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