摘要
提出了一种基于平均信道增益矩阵的分布式天线无线通信系统下行功率控制算法。该算法根据接收端通过理想信道估计获得的信道状态信息(CSI),对各中心基站经光纤传送的发射功率在其所属各天线单元处进行加权分配,在保证整个覆盖区域内的所有移动台达到平衡的信干比的前提下使各个中心基站的发射功率达到最小。仿真结果表明,与现有的分布式天线系统中的功率控制算法相比,新算法可以显著地降低各中心基站的发射功率,提高整个系统的容量。
A power control algorithm for the downlink of a distributed antenna wireless communication system is proposed by the use of the average channel gain matrix.On the basis of channel state information（CSI） the receiver obtains by the ideal channel estimation,the algorithm allocates the transmit power of the BS via optical fiber to each antenna at a weight relative to the channel gain between antennas and mobile stations to minimize the transmit power of every BS under the condition that the SIR of all the mobile stations in the coverage area are balanced.Simulation results show that compared with the existing power control algorithm in distributed antenna systems,the new algorithm can significantly reduce the transmit power of the central base stations and improve the overall system capacity.
出处
《信息工程大学学报》
2011年第2期188-192,共5页
Journal of Information Engineering University
基金
国家863计划资助项目(2009AA011202
2009AA011205)
关键词
分布式天线
信道增益
功率控制
算法
distributed antenna
channel gain
power control
algorithm
