LMSS中的遮蔽衰落模式分析

Models Analysis of Shadowing Fading in LMSS

本文对ＬＭＳＳ遮蔽环境中的衰落分布进行了分析，利用现有实验数据和ＥＲＳ模式的基本形式，重新确定了经验模式参数在不同遮蔽条件下与仰角和频率的关系；同时，通过分析与拟合，给出了不同频率和遮蔽条件下的Ｌｏｏ模式参数与仰角的关系。最后，用本文提供的经验衰落预测模式和Ｌｏｏ模式进行了预测和比较，结果表明，两种方法极为一致，且精度较好。

This paper analyzes the fading distributions for different shadowing environments in LMSS.Based on experiment data available and the fundamental fashion of ERS model,the dependences of the parameters of the empirical model on elevation and frequency are newly determined for different shadowing conditions; meanwhile, by analyzing and fitting,the dependences of the parameters of the Loo model on elevation are given for different frequencies and shadowing conditions. Comparison are made between the empirical fading prediction model and Loo model,the results show that this two methods are both in agreement with the data.