26GHz LMDS在雨区中传输的分析  

Transmission analysis of 26GHz LMDS in tropical rain region

作　　者：陈斗雪[1] 黎毅明[1] 陈一天[1] 余爱民[1] 

机构地区：[1]广东科学技术职业学院,广东广州510640

出　　处：《计算机工程与设计》2007年第3期729-731,共3页Computer Engineering and Design

基　　金：广东省科技计划基金项目(2002C1010106;2005B10101016);珠海市科技计划基金项目(pc200320010)

摘　　要：分析了降雨对26 GHz LMDS产生的降雨衰耗和去极化,并给出了有关的公式。介绍了一个26GHz LMDS在新加坡降雨时进行测量的方法和结果。研究指出,降雨对26 GHz LMDS的信号传输有很大的影响,随着降雨率的增加,降雨衰耗的增加接近线性,差分衰减和差分相移的增加变得更加显著。当降雨率接近90mm/h时,会出现3 dB的差分衰减和45°的差分相移。The effects of rain attenuation and depolarization on 26GHz LMDS are studied and their relationships are formulated. The settings and empirical measurement results of26GHz LMDS that is conducted in Singapore during rainfall are also shown. The conclude that rainfall has a significant effect on 26GHz LMDS communication is obtained. The increment of rain attenuation is almost linearity when rate of rainfall increase. Attenuation difference and phase difference become significant as the rain rate increases and there is an attenuation difference of 3 dB and a phase difference of 45°when the rate approaches 90 mm/h.

关 键 词：本地多点分配业务 降雨衰耗 降雨衰减系数 去极化 正交极化 

分 类 号：TN914.5[电子电信—通信与信息系统]