中文摘要：

对TD-SCDMA系统中的多基站定位方法进行了研究,提出了一种利用TD-SCDMA物理层中的上行同步序列（SYNC-UL）进行定位的上行到达时间差（U-TDOA）定位方法.该方法无需对移动终端增加任何功能即可实现定位.TD-SCDMA系统采用上行同步技术,上行同步序列的长度是下行同步序列的两倍,有利于实现相关峰测距,从而建立双曲线定位模型计算终端位置.通过仿真说明,U-TDOA定位方法的定位性能在一定条件下优于利用下行同步序列定位的性能.

英文摘要：

The multi-BS positioning technology in TD-SCDMA systems is studied in this paper. The uplink-time difference of arrival （U-TDOA） poisoning method based on synchronous uplink （SYNC-UL） of TD-SCDMA systems is proposed, which doesn＇t need to improve the functionality of mobiles. To achieve the uplink synchronous of TD-SC- DMA system, the length of SYNC-UL is twice as much as SYNC-DL. It is easy to measure the distance using correla- tion peek based on SYNC-UL. Then establish hyperbola mathematical model to calculate mobiles＇ position. From the simulation results we can conclude that the positioning performance of U-TDOA is better than the performance of the positioning method using SYNC-DL.