一种改进的到达时间差无线定位算法研究

摘要

Time difference of arrival (TDOA) location algorithm is the most commonly used algorithm in wireless location.TDOA applications are used in more ideal situation.It doesn't take practical application of multiple reflection and other issues into account.The concept of an effective transmission speed was put forward.Some disadvantages of TDOA want be changed and improved the sample data of NLOS scenario analysis, using the positioning results and the actual position of the alignment error.The height of the terminal in the ground is not more than 50 meters was thinked, in the case of the effective speed in the unit are fixed.Therefore, this algorithm can obtain the effective speed limit height error correction method, and select the two decimal places after the results.This algorithm can get a more accurate positioning results, the average error of the five sets of data is within 0.5 meters.More accurate positioning results will be obtained if the height is restricted more strictly, or the retention of more effective bits of the effective speed.%提出一种有效传输速度的概念,针对到达时间差(TDOA)中的部分不足进行弥补和改进,对样本数据进行非视距场景进行分析.最终,对移动终端定位结果进行误差分析;并与原TDOA结果进行比对.有效速度在单位固定的情况下,考虑到终端在地面的高度几乎不超过50 m,因此,算法对有效速度进行限定高度误差修正的方式获取,并选取小数点后两位结果.提出的改进TDOA无线定位算法可得到较为精确的定位结果.样本有五组数据,每组1 100个终端数据,最终误差均值可在0.5 m以内.如果对高度限定更加严格,或者对有效速度更多有效位数的保留,将得到更为精确的定位结果.