摘要
文章从卫星通信系统的功率控制原理入手,提出了一种适合CDMA卫星通信系统的功率控制方法;给出了精准的功率控制时的系统容量,通过推导给出的中断概率公式和例举的CDMA卫星通信系统实际数据,将功率控制误差对于系统容量的影响进行了仿真。仿真结果表明,当标准方差不断增大,系统的中断概率增大,系统容量随之显著减小;而采用精准的功率控制技术,可以有效改善系统性能。
Starting with the principle of power control in satellite communication system,power control method of CDMA satellite communication system is proposed; system capacity of accurate power control is derived. Via the outage probability formula derived and practical data of CDMA satellite communication system, the influence of power control error on system capacity is simulated. The simulation indicates that when the square error increases, the outage probability of the system rises, while the system capacity decreases apparently; however, the system performance can be improved effectively when accurate power control technology is adopted.
出处
《通信技术》
2008年第2期123-125,共3页
Communications Technology
关键词
卫星通信
CDMA
反馈环功率控制
中断概率
容量
satellite communication
CDMA
loop-back power control
outage probability
capacity
