摘要
针对短波宽带信道模型仿真的难点,提出利用对数正态分布概率密度函数拟合模型中的时延功率谱剖面函数,并对对数正态分布、高斯分布与伽马分布的概率密度函数拟合精度进行了比较。仿真结果表明,对数正态分布比高斯分布的精度更高,且比伽马分布易于实现。
The probability density function （PDF） of logarithm normal distribution is proposed to be used as the fitting - function of the delay power profile in wideband high frequency channel model to replace the PDF of gamma distribution that used in the model before because the PDF of gamma dis- tribution is difficult to implement in channel simulation. Then the eomparisen of the fitting preeisions of logarithm normal distribution and gamma distribution, Gaussian distribution and gamma distribu- tion was done. Simulation results show that the logarithm normal distribution is more precise than Gaussian distribution and is easier to implement than gamma distribution.
出处
《无线通信技术》
2013年第2期11-14,共4页
Wireless Communication Technology
关键词
短波
信道模型
时延功率谱
拟合函数
high frequency
channel model
delay power
fitting - function
