非静止轨道移动卫星通信中CDMA误码性能分析  

On the Bit Error Probability of CDMA in Non-geostationary Orbit Mobile Satellite System

作　　者：曹世文[1] 李乐民[1] 吴诗其[1] 

机构地区：[1]成都电子科技大学

出　　处：《通信学报》1996年第2期17-21,共5页Journal on Communications

基　　金："863"计划国家教委高校博士点基金

摘　　要：分析了非静止移动卫星通信中ＣＤＭＡ的误码性能。考虑移动卫星的信道模型为有遮蔽的菜斯衰落模型，并将卫星覆盖的最小仰角对误码的影响引入到该模型中，推出了在高斯近似多址干扰下和最大似然二阶分集下，用户数、仰角和码长与误码的关系式，计算了数值曲线并讨论了结果。The bit error probability of CDMA in non-geostationary orbit mobile satellite system is analysed.This paper considers the Shadowed Rician Fading as the channel model for mobile satellite system and introduces the minimum elevation angles into channel model.With the hypothesis of Gaussian multiaccess interference approximation,the formula of relationship between user numbers,elevation angles,spread spectrum code length and bit error probability are deduced.The numerical results are obtained and discussed.

关 键 词：误码分析 移动卫星通信 卫星通信 码分多址 

分 类 号：TN927.2[电子电信—通信与信息系统]