摘要
由地球同步卫星、地面中心站和用户机组成的集中式卫星定位系统中,用户到中心站的入站链路采用码分随机多址接入信道;出站链路采用扩频/TDM广播信道。本文建立了入站信道的用户容量模型,获得用户容量、系统参数、设备要求之间的关系;为增大出站广播信道的通信容量、采用同步码分多路复用技术,推导出计算数据误码率的公式。由计算机模拟,给出一系列曲线和图表以作为系统设计依据。
In the centralized satellite radio-determination communication system consisted of synchronization satellites, center station on earth and users, the channel of code-division random-access adopted as the inbound-link from users to the central control station and broadcasting channel is used as outbound-link. The paper attempts to form an user's capacity model of the inbound channel and find the general relationship among the user's capacity, system parameters and equipment. We propose a code division multiple access technique in order to add capacity of outbound broadcasting channel, and derive a formula to calculate the probability of data error on the environment. The charts and curves obtained by computer simulation can be used as the basis of system design.
出处
《通信学报》
EI
CSCD
北大核心
1991年第1期63-69,共7页
Journal on Communications
