无线定位系统中提高精确度的一种方法(英文)

A method of accuracy improvement in a wireless location system

多径传播是无线定位系统中引起定位误差的主要原因。采取适当的方法减轻多径的影响是基于时间的无线定位系统中TOA估计的关键。提出了一种提高TOA测量准确性的简单而有效的方法。仿真结果表明:采取边缘检测方法,并适当的增加观察时间,可以实现比传统的峰值检测可靠的TOA测量值。

Multipath propagation is the primary reason for inaccuracies observed in the wireless location system. Adopting proper methods to mitigate the effects of multipath is a key to TOA estimation for time-based wireless location system. In this paper a simple and efficient method is presented to improve the accuracy of the TOA measurement. The simulation result shows that if a leading edge detection method rather than the peak detection method is adopted, with a small increment of observation time, a much more reliable TOA measurement could be realized.