【摘要】 研究了无线信道大尺度路径损耗和小尺度信号衰落的基本原理,论证在当前移动自组网的性能研究中,未引入小尺度信号衰落所造成的不客观性。对NS-2仿真软件进行开发,设计基于瑞利分布的小尺度信号衰落模型,实现真实无线信道环境的仿真。通过仿真实验,分析小尺度信号衰落所产生的瞬时链路对通信性能所产生的影响,并提出相应的应对思路和策略。更多还原

【Abstract】 The theory of large-scale path loss and small-scale signal fading are studied,the inaccuracy of performance analysis for the absence of small-scale fading in current study of MANET is verified.Extension is developed for NS-2 to implement small-scale fading model based on Rayleigh distribution for real wireless channel emulation.By experiment,the impact on communication performance from transient links caused by small scale signal fading is analyzed,and the ideas and measures are proposed to deal with it.更多还原