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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.
With the development of mobile communication, the number of mobile users increases rapidly, and the contradiction between the growth of mobile communication traffic and limited spectrum resources becomes increasingly prominent.One approach to solve the above contradiction is to increase the effective utilization of spectrum.In recent years, A technology of spectrum efficient utilization has drawn wide attention.With the difference of the spatial characteristics of each user’s signal, the smart antenna automatically adjusts the gain of the antenna array according to a certain reception criterion so that multiple users can be received and sent on the same channel However, one must solve the problem of unsynchronization in the receiving and transmitting of the antenna array due to the signals propagating through different hardware and space paths. The author of this paper theoretically proves the phase by analyzing the phase difference Poor satisfies the linear model and studies how to solve this problem through parameter estimation.