In order to reduce the adverse influence of nlos error to location performance , this algorithm firstly makes initial mobile position estimation by mean tdoa / toa measurements , then estimates nlos error within tdoa / toa measurements by parameters of tip 1 channel model , smoothes and reconstructs tdoa / toa measurements , and finally utilizes two step wls computation . the application of this algorithm under different cellular environments is also discussed and its effectiveness is demonstrated by simulation results . finally , the basic location method , location method implementation , network architecture , signaling protocol and interface , and location procedures of wcdma network mobile location are analyzed 百臼主回大学槽士扭允生攀幢伍丈第v页接着，通过对tdo咖a测量值误差的分析，本文提出了一种首先利用tdo咖a平均测量值对移动台位置进行初始估计，并利用tipi信道模型参数估计出thoafl ’ oa测量值中nlos误差的大小，然后对tdo … a测量值进行平滑与重构，再采用两次wls计算，以降低nlos误差对定位性能不利影响的的定位精度提高算法，讨论了这种算法在蜂窝网络不同环境条件下的具体实施方法，通过详细仿真验证了这种算法的有效性。
