一种基于TOA的UWB直接-Taylor复合定位算法

Pseudorandom Code Correlation-based UWB Muliti-points Coorperation Location Algorithm

通过比较直接算法和Chan算法的优缺点,针对Chan算法作为T ay lor初值算法运算比较复杂的问题,分析了基于TOA到达时间的UW B(超宽带)定位算法,即直接-T ay lor复合定位算法,将直接算法作为T ay lor序列展开法的初值算法,并根据初值判断定位基站是否为视距(LO S)传播及修正基站到定位体的距离测量值,有利于T ay lor序列展开法的收敛。仿真表明该算法定位性能优越,在非视距传播(NLO S)的影响下有效地提高定位精度,定位误差达到厘米级,计算速度也有较大的提高。

Ultra Wideband Technology will be widely used in ranging and localization. In this paper, direct-Taylor algorithm used for Ultra Wideband wireless location is proposed for its advantages in getting initial value for Taylor method more quickly and in getting more accurate position. It is based on time-of-arrival（TOA）. This cooperative location algorithm is a combination of the direct-calculation method and Taylor series expansion method where the result of the former method is used as the initial value of the Taylor method. The rapidity of convergence0, of Taylor series can be improved by this way＇. Simulation results show that this method can significantly improve the location accuracy under serious NLOS with centimeter resolution. The algorithm proposed in this paper results in less computation time than that in reference literatures.