基于TOA/TD0A的Ad hoc网络无线定位研究

基于802.11b协议,该文针对Ad hoc网络的特点,探讨适合Ad hoc网络的定位方案.用TOA法获得定位中需要的时间测量值,从而得到各信标台的距离差;并对所得信息进行分解、综合,用TDOA法得到移动台的位置估计.这在多点定位时降低了矩阵的阶数,加快了运算速度.在此基础上,用适合于运动对象的扩展Kalman滤波算法对位置估计进行了优化,使得定位精度更加准确.

A DOA/TDOA Based Research on Ad hoc Network Wireless Location

Based on the protocol of 802.11b, this paper analyzes the characteristics of Ad hoc network in an attempt to establish a location scheme for the Ad hoc network. The TOA algorithm is used to obtain the time measuring values required in the location procedure and thus obtain the difference of interval of each beacon achieved. The information obtained is then analyzed and integrated and the TDOA algorithm is used to get the estimated location of the mobile station. This novel method reduces the rank of matrix in multi-points location and speeds up the operation. On the basis on this, the Extended Kalman Filter algorithm is applied to optimize the location estimation.