线性模型统计估计在智能天线同步中的应用  

The application of linear model statistical estimation in synchronization of smart antennas

作　　者：王丙进[1] 朱允民[1] Bing-Jin Yun-Min 

机构地区：[1]四川大学数学学院,成都610064

出　　处：《四川大学学报（自然科学版）》2009年第6期1575-1580,共6页Journal of Sichuan University(Natural Science Edition)

摘　　要：随着移动通信的发展,移动用户迅速增加,移动通信业务量的增长与有限的频谱资源的矛盾日益突出.解决上述矛盾的一种途径是提高频谱的有效利用率.近年来,智能天线作为提高频谱有效利用率的一种技术受到了广泛的关注.智能天线是利用各用户信号空间特征的差异,根据某个接收准则自动调节天线阵列的增益,使得在同一信道上可以接收和发送多个用户的信号而互相不干扰.但是人们必须解决由于信号通过不同的硬件和空间路径传播而在天线阵列接收和发射上引起的不同步问题.本文作者通过分析相位差的产生,从理论上证明了相位差满足线性模型,并研究了如何通过参数估计来解决这一问题.As the growing demand for mobile communications constantly,the need for better coverage, improved capacity,and higher transmission quality rises.Thus,a more efficient use of the radio spectrum is required.Smart antenna systems are capable of efficiently utilizing the radio spectrum and, thus,hold a promise for an effective solution to the present wireless system's problems.By forming beam toward the intended user and/or steering nulls toward interferers,smart antennas provide a spatial filtering of transmitted and received signals,thereby allowing multiple users to transmit signals in the same time slot and frequency band and not be interfered with each other.But there is a problem that we have to consider:Due to difference of hardware and transmittable path,loss of synchronization is possible. This paper is about to analyze the problem,establish the linear model of phase difference and provide a parameter estimation method to solve it.

关 键 词：线性模型 统计估计 智能天线 同步问题 SMART ANTENNAS linear model mobile COMMUNICATIONS 有效利用率 transmission quality phase DIFFERENCE estimation method 移动通信业务量 天线阵列 antenna systems 用户信号 相位差 接收 高频谱 SMART time SLOT 

分 类 号：N55[自然科学总论]