摘要
Ad Hoc网络是干扰受限系统,为了获得较高的网络传输容量,需要引入合适的功率控制策略,降低网络中的干扰。分数阶功率控制是一种新型的功率控制策略,是对信道反转功率控制的改进。这里推导分数阶功率控制时的中断概率和传输容量的n阶近似表达式,研究了n阶近似表达式的准确度,讨论了分数阶功率控制相对于信道反转功率控制对网络性能的改进。通过研究表明,适当的选择合适的分数阶功率控制系数可以使得中断概率最小,传输容量最大。
An Ad Hoc network is an interference-limited system. To get high transmission capacity, proper power control strategy is required. Fractional power control is a new power control strategy, and also an improvement of channel inversion power control. In this paper the n-th order approximate expressions of outage probability and transmission capacity is derived, the accuracy of the n-th order approximate expressions studied, and the improvement of fractional power control discussed. Study and research indicate that the minimum outage probability and the maximum transmission capacity could be achieved by selecting the right value of fractional power control factor.
出处
《通信技术》
2012年第7期41-44,共4页
Communications Technology
关键词
分数阶功率控制
信道反转
中断概率
传输容量
fractional power control
channel inversion
outage probability
transmissioncapacity
