Nodes Deployment Optimization for Indoor Localization Using FIR Filter

In order to improve the positioning accuracy of ultra-wideband (UWB) positioning system, it is usually to reduce the measurement error or choose a better positioning algorithm, and the geometric relationship between the blind node and the reference node is also an important factor affecting the positioning accuracy. In this paper, the minimum geometric dilution of precision (GDOP) of the mean value of the trajectory is proposed as the criterion for judging the optimal geometric layout of the reference node. After the optimal geometric layout of the reference node is obtained by the evaluation criterion, the finite impulse response (FIR) filter is selected to filter the observed values to remove noise and improve the system performance again. After simulation, it can be concluded that this method can effectively reduce the positioning error and improve the positioning accuracy.