论文标题
动态干扰阈值及其对网络容量的影响的统计建模
Statistical Modelling of Dynamic Interference Threshold and Its Effect on Network Capacity
论文作者
论文摘要
在本文中，我们介绍了使用干扰温度（IT）作为动态数量的情况，而不是基于正交的频分部多访问（OFDMA）频谱共享系统中的固定量。这里的基本想法是在设置二级用户（SU）的干扰功率阈值时反映主要用户（PU）的容量需求的变化。这种类型的动态将使SU在放松的时期内具有更高的发射功率，从而导致更高的网络容量。本文考虑的认知无线网络（CRN）具有底层网络配置，其中SU同时访问了PU的可用频谱，前提是SU的PU接收器的干扰能力在某个功率阈值下。此功率阈值将设定为PU网络的一定水平的服务质量（QoS）。与在认知无线电系统中利用固定的IT相比，使用动态IT导致了高网络性能提高，因此得出了SU网络中断概率和平均能力的理论表达式，并通过模拟结果进行了验证。
In this paper, we present the case of utilizing interference temperature (IT) as a dynamic quantity rather than as a fixed quantity in an orthogonal frequency division multiple access (OFDMA) based spectrum sharing systems. The fundamental idea here is to reflect the changing capacity demand of primary user (PU) over time in setting the interference power threshold for secondary user (SU). This type of dynamic IT will allow the SU to opportunistically have higher transmit power during relaxed IT period, thereby resulting in higher network capacity. The cognitive radio network (CRN) considered in this paper has an underlay network configuration in which the available spectrum of the PU is accessed concurrently by SU provided that the interference power at the PU receiver from SU is under a certain power threshold. This power threshold is set to maintain and guarantee a certain level of quality of service (QoS) for PU network. Theoretical expressions for outage probability and mean capacity for SU network are derived, and validated with simulation results, and it is observed that utilizing dynamic IT results in high network performance gains as compared to utilizing a fixed IT in cognitive radio system.
