宽带移动卫星通信信道的研究

Research of Wide-Band Satellite Mobile Channels

宽带码分多址技术是第三代移动通信发展的主流 ,因此宽带卫星移动通信将得到快速发展。首先分析了卫星移动通信信道的特点 ,在此基础上建立了宽带移动卫星通信信道模型并对其进行了计算机仿真。利用该信道模型对市区、郊区、农村 3种环境及不同卫星仰角下多用户宽带 DS- CDMA系统的下行链路误码性能进行了研究。

It is appeared that wide band code divison multiple access has become the mainstream in air interface solution of third generation mobile system and wide band satellite mobile communication is expected to develop more rapidly. In this paper, based on a brief analysis of transmission characteristics of satellite mobile communication channel, we present and simulate a channel model of wide band satellite mobile communication. We also set up a transmission and receiving system of K user wide band DS CDMA and study the basis code error property on down link of a satellite mobile communication in the environment of urban, suburban and rural areas.