基于RSS空时处理的指纹定位算法

摘要

为提高移动台定位算法的精度,研究了基于接收信号强度(received signal strength,RSS)空时处理的指纹定位算法.该算法包含指纹数据库的建立和指纹比对,在指纹数据库建立过程中,利用空时处理的方法克服无线信号的衍射、散射等影响;指纹比对时,研究了相同邻小区个数的选择对定位误差的影响,得出相同邻小区个数的最优选择.仿真结果表明,算法减小了RSS的波动性,具有低运算复杂度和高精度.%In order to improve the accuracy of the mobile station positioning algorithm, this paper studied the fingerprint algorithm for positioning based on RSS space-time processing. The algorithm which included the establishment of fingerprint database and fingerprint comparison used the RSS space-time processing method to overcome diffraction, scattering, etc of the wireless signal when creating the fingerprint database, studied the impact of the choice of same neighboring cell numbers on the positioning errors and got the best choice of same neighboring cell numbers when doing fingerprint comparison. The error simulation results show that the algorithm reduces the time variation of RSS and has low complexity and high accuracy.