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在由中继卫星、地面中心站和移动用户组成的集中式移动卫星通信系统中,为了满足日益增长的移动用户通信业务量的需要,本文提出中心站到移动用户间的出站链路采同同步码分多址复用的广播信道,从而使通信系统利用率增高的方法,并且推导出计算误码率的公式。由计算机模拟,给出各种信噪比情况下,3、5和7路复用的误码率,并与单路时的误码率进行了比较。
In the centralized mobile satellite communication system composed of relay satellites, terrestrial center stations and mobile subscribers, in order to meet the increasing demand of mobile user communication traffic, this paper proposes that the outbound links between the central station and the mobile subscribers should be taken together Synchronization code division multiple access broadcast channel, so that the utilization of communication systems increased, and derived the formula to calculate the bit error rate. By computer simulation, given the various signal-to-noise ratio, 3, 5 and 7 multiplexed bit error rate, and when compared with the single bit error rate.