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Based on a brief analysis of transmission characteristics of satellite mobile communication channels, this paper presents a channel model of satellite mobile communication and shows signal envelop, PDF and envelop spectrum. This paper further sets up a receiving and transmitting system of K user DS CDMA and studies the basis code error property on down link of a satellite mobile communication. 分析了移动卫星通信信道的传输特征,建立并计算机模拟了移动卫星信道的统计模型,并在此基础上,建立了理想的K用户直接扩频码分多址(DSCDMA)收发系统,研究其下行链路的误码性能。 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 ... 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. 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。
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