S-band LMS propagation channel behavior for different environments, degrees of shadowing and elevation angles
S-band LMS propagation channel behavior for different environments, degrees of shadowing and elevation angles
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DOI：
10.1109/11.713055
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发表时间：
1998-03-01
影响因子：
4.5
通讯作者：
Arbesser-Rastburg, B
中科院分区：
文献类型：
--
作者：
Perez-Fontan, F;Vazquez-Castro, MA;Arbesser-Rastburg, B
实验陆地移动卫星（LMS）传播数据已被处理，以表征该信道在困难环境、阴影程度和仰角的窄带传输条件下的行为。测量在s波段进行。发射机位于一个与道路平行飞行的小平面上，仰角范围为40°~ 80°。为了对接收到的振幅序列进行分析，它们被分类，对于每个环境和仰角，根据所经历的阴影程度分为三种不同的状态。这样做是为了开发一个基于马尔可夫链的传播模拟器[1]。每个州内的全局（慢+快）信号变化使用Loo分布（Rice + Log-Normal）[2]建模。报告了各个状态、仰角和环境类型的平均分布参数值。给出了平均状态概率、慢变相关长度等参数。最后，描述了基于马尔可夫链+ Loo分布模型的软件实现，该模型能够再现接收信号中由于阴影和多径而产生的复杂包络变化。
Experimental Land Mobile Satellite (LMS) propagation data have been processed in order to characterise the behaviour Of this channel under narrow-band transmission conditions for difficult environments, degrees of shadowing and elevation angles. Measurements were carried out at S-band. The transmitter was located on a small plane flying parallel to the road with elevations ranging from 40 degrees to 80 degrees For the analysis of the received amplitude series, they were classified, for each environment and elevation angle into three different States according to the degree of shadowing experienced. This was done in order to develop a Markov chain based propagation simulator [1]. The global (slow + fast) signal variations within each State are modelled using the Loo distribution (Rice + Log-Normal) [2]. Average distribution parameter values for each State, elevation angle and environment type are reported. Also average State probabilities, slow variations' correlation lengths and other parameters are presented. Finally, a software implementation is described based on a Markov chain + Loo distribution model that is capable of reproducing the complex envelope variations in the received signal due to shadowing and multipath.