摘要
从提高功率有效性的角度,建立分布式天线系统天线之间功率协调分配的线性规划模型;利用改进单纯形算法进行最优功率分配。数值仿真结果表明,随着天线数的增多,达到用户最低SNR基站所需要的发送功率逐渐减小;与集中式系统和分布式系统功率固定分配方案相比,文中所提功率分配方案可以大幅度节省发射功率,提高系统的功率有效性。
A linear program based on power allocation model is proposed to enhance power efficiency of distributed antennas system. The modified simplex algorithm is explored to conduct optimal power allocation. Simulation results show that the more the transmit antennas, the less power is needed to satisfy the lowest SNR by users, and that the proposed power allocation scheme could more considerably save transmit power, and more significantly raise system power efficiency than fixed power allocation schemes in distributed systems and centralized systems.
出处
《通信技术》
2009年第3期30-32,共3页
Communications Technology
基金
国家高技术研究发展计划("863"计划)基金资助项目(No.2007AA01Z207)
新世纪人才基金资助项目
东南大学移动通信国家重点实验室研究课题基金资助项目(No.2008A06)
关键词
功率有效性
功率分配
分布式天线系统
线性规划
power efficiency
power allocation
distributed antennas system
linear program
