摘要
首先建立了一个包括直达波和非直达波的无线电波的传播模型,然后得到宽带接收系统中接收信号的电平表达式,再通过MATLAB仿真得到宽带接收系统中信号的电平变化和分布的特性。根据仿真结果,可知宽带接收系统的信号电平变化约为10dB,信号电平的分布受到传播模式中的接收带宽、达波数、路径差的影响。
In this paper a mobile propagation model that includes not only indirect arriving waves but also direct arriving waves is proposed. On the basis of the model, we derived a mathematical expression for the signal level. Then we used MATLAB to simulate different characteristics between wide-band and narrow-band received systems. For a received signal-level variation in wide -band transmission is about 10 dB and is influenced by received bandwidth, arrived wave number and path length difference.
出处
《长春理工大学学报（自然科学版）》
2006年第2期48-52,75,共6页
Journal of Changchun University of Science and Technology(Natural Science Edition)
关键词
多径衰落
视距
衰落深度
信号电平
Multi - path fading
Line - of - sight
Fading depth
Signal level
