野外信号传输系统，信号衰落分析建模，针对野外无线信号传输的特点，对信号传输过程中的路径损耗进行分类分析-the analysis of the path loss in outdoor wireless signal propagation

压缩包是三个matlab源程序，用于产生自由空间路径损耗、对数距离路径损耗以及对数正态路径损耗。-Package is three matlab source, used to produce free space path loss, log distance path loss and lognormal path loss.