摘要
随着移动通信技术的发展,在有限频谱资源下,为提高无线通信系统的频谱效率和系统容量,软频率复用成为了关键技术。静态软频率复用通过调整系统资源和功率等参数达到减轻小区边缘用户干扰、提高系统容量的效果,它只能相对固定地进行功率控制,而没有根据每个用户具体情况进行功率控制。因此,针对静态软频率复用资源分配问题,根据功率控制参数β值的动态变化和中心用户与基站之间的距离比K值的函数关系,给出了确定中心用户发射功率的五种不同方案,最终仿真得出合适的β值选取方案。通过仿真结果显示,与静态软频率复用相比,当β值与K值成线性关系时,软频率复用动态功率控制在提升小区吞吐量、降低中断概率、提高小区面积百分比等方面有一定优势,可进一步提升小区整体性能。
With the development of mobile communication technologies,soft frequency reuse has become a key technology in order to increase the spectrum efficiency and system capacity of wireless communication systems under limited spectrum resources.Static soft frequency reuse achieves the effect of reducing user interference at the edge of the cell and improving the system capacity by adjusting parameters such as system resources and power.However,it can only perform relatively constant power control,and does not perform power control according to the specific conditions of each user.Therefore,in order to solve the static soft frequency reuse resource allocation problem,based on the functional relationship of the power control parameterβand the distance ratio K between the center user and the base station,five different schemes to determine the transmit power of the center user were given,and finally,a suitable value selection scheme was obtained.The simulation results show that soft frequency reuse dynamic power control has certain advantages in improving the cell throughput,reducing the outage probability,and increasing the percentage of the cell area,and can further improve the overall performance of the community when theβvalue and the K value are in a linear relationship compared with the static soft frequency reuse.
作者
高明华
许丽金
龚建生
GAO Ming-hua;XU Li-jin;GONG Jian-sheng(School of Information Engineering,East China Jiaotong University,Nanchang Jiangxi 330013,China;Wuhan Metro Operation Co.,Ltd.,Wuhan Hubei 430030,China)
出处
《计算机仿真》
北大核心
2020年第6期147-151,共5页
Computer Simulation
基金
国家自然科学基金资助项目(61563014)。
关键词
软频率复用
动态功率控制
小区吞吐量
中断概率
小区面积百分比
Soft frequency reuse
Dynamic power control
Cell throughput
Outage probability
Percentage of cell area
