线形小区中基于定时捕获阶段的最优天线位置设计

Design of Optimal Antenna Location in Linear Cells Based on Timing Acquisition

针对线形小区,研究设计了基于定时捕获阶段的分布式天线的位置。首先,利用互相关定时捕获方法建立捕获模型;然后,基于极小极大准则,找出线形小区中移动台不同位置时定时捕获的最坏情况;最后,利用定时捕获最坏情况概率推导出每根分布式天线的最优位置。仿真研究表明:当线形小区中移动台位置均匀分布时,任意多根分布式天线的最优天线位置应基于线形小区的中心对称放置;载波频率偏移对分布式天线的最优位置影响并不明显。

In linear cells, the optimal location design for distributed antennae is conducted based on timing acquisition. First, the model of timing acquisition is formulated by using the cross - correlation method. Then, the worst cases of timing acquisition with the different locations of mobile station are explored according to the minimax criterion. Finally, the optimal antenna location of each distributed antenna is derived with the the probability of the worst case. When the distribution of mobile station is uniform in the linear cells, the research results show that the distributed antennae should be located symmetrically. The research results also show that the effect of carrier frequency offset on the optimal antenna location is not obvious.