卫星重叠通信系统功率控制策略研究

Research on Power Control Strategy in Satellite Overlap Communication System

针对卫星重叠通信系统中扩频信号与原业务信号相互干扰的问题,提出了一种功率控制的策略。该策略分析了原业务信号对扩频信号的影响,给出了一种预测原业务信号功率的方法,来计算单用户的发射功率;并且推导出扩频信号总的发射功率与原业务性能恶化的关系,来限制扩频信号的发射功率。在上述理论分析的基础上,对一种典型的卫星重叠通信系统进行分析,评估出在原业务信号允许的恶化量为1 d B时,可接入用户数为22个。

In view of mutual effects of spread spectrum signal and original service signal in satellite overlap communication system,a power control strategy is proposed. This strategy analyzes the influence of original service signal on original service signal,and gives a method of forecasting the original service signal power to calculate the transmitting power of each station; and deduces the relationship between the power of spread spectrum signal and the deterioration of the original service performance to limit the transmitting power of spread spectrum signal. On the basis of the above theoretical analysis,the number of users that can be accessed is 22 for a typical satellite overlap communication system when the deterioration of the original service signal is 1d B.