论文部分内容阅读
UHF、L频段路边树遮蔽和多径衰落实验分别于 1 999年 8月和 9月在河南安阳境内进行。利用日本 GMS1 40 E气象卫星为信标 ,其下行频率分别为 468.92 4 MHz和 1 691 .0 0 MHz,有效全向辐射功率分别为 37d Bm和 56d Bm,中频带宽分别为 2 k Hz和 2 0 0 k Hz,极化方式均为线极化。地面接收系统和数据处理设备安置于汽车上。此项实验的目的是为地面卫星移动通信系统的设计提供重要的信道参数。本文给出了路边树遮蔽的累计分布特性以及相应的预测模型。
UHF, L band roadside tree shading and multipath fading experiments were conducted in August 1999 and September in Henan Anyang territory. The use of Japan’s GMS1 40 E weather satellite as a beacon with downlink frequencies of 468.92 4 MHz and 1 691 .0 0 MHz, respectively, with an effective isotropic radiated power of 37d Bm and 56d Bm, respectively, with IF bandwidths of 2 k Hz and 20 0 k Hz, the polarization mode is linear polarization. Ground receiving system and data processing equipment placed in the car. The purpose of this experiment is to provide important channel parameters for the design of terrestrial satellite mobile communications systems. This paper presents the cumulative distribution of roadside tree shading and the corresponding prediction model.