WLAN无线定位中NLOS误差排序与抑制的研究  

Research of Ranking and Restraining NLOS Error in WLAN Wireless Location

作　　者：王珂[1] 张元[2] 

机构地区：[1]郑州大学信息工程学院,郑州450052 [2]河南工业大学,郑州450052

出　　处：《科学技术与工程》2007年第3期303-306,共4页Science Technology and Engineering

基　　金：国家自然科学基金(60673108);河南省杰出人才创新基金资助(0221000200)

摘　　要：提出在WLAN中使用TDOA定位方法的Chan算法对移动终端进行位置估计,然后对位置估计结果使用残差加权算法进行NLOS误差抑制。通过仿真证明,尽可能选择不受NLOS影响的时间测量值参与Chan算法和残差加权算法,通常能以较小的计算代价取得相对理想的定位精度。并在数学理论上证明了可将Wylie方法用于NLOS误差排序,以挑选出合适的时间测量值。Using Chan algorithm of TDOA location method in WLAN to estimate position of mobile terminal is proposed, then using residual weighting algorithm to the result of estimation in order to restrain NLOS error. Simulation shows that to select the time measurements which are free from the influence of NLOS as far as possible to participate in Chan algorithm and residual weighting algorithm, that can usually obtain relatively ideal location accuracy with smaller cost of calculation. And the mathematics theory proves that can use the Wylie method to rank NLOS error for choosing the proper time measurements.

关 键 词：WLAN 无线定位 Wylie方法 CHAN算法 残差加权算法 

分 类 号：TN929.5[电子电信—通信与信息系统]