基于MPS的移动台混合定位方法

Mixed locating mobile station method based on MPS

移动通信系统中,针对移动台的定位精度问题,提出基于MPS的混合定位方法。该方法引入一个专门处理目标用户地理位置信息的辅助系统,该系统不仅收集来自GPS的关于目标用户的位置信息,同时收集来自基站的位置信息。对信息加工整理后,再把最终的定位结果提交给用户。通过改进的Chan算法,有效降低了NLOS传播的误差影响。该方法兼顾了GPS的高精度和TDOA快速定位的优点,Matlab的仿真结果表明,该定位方法能够提高Chan算法在NLOS影响下的定位精度。

In mobile communication system, a new locating mobile station method is presented to improve the location precision, which is based on mobile position system and combined with TDOA method. The method has introduced an assis .tant system to manage the information of users＇ location. The assistant system collects the information not only from GPS, but the base stations＇. The final result is committed to user after processing all the information. The performance of the proposed algorithm is evaluated analytically and via computer simulations. Simulation shows that the algorithm can improve the accuracy of location better than Chan＇s algorithm, which was developed to mitigate the NLOS influence in propagation.