Research on TDOA location error elimination of hazardous chemicals storage based on improved wavelet

Abstract

Hazardous chemicals need to strengthen the monitoring and management of storage because of its particularity to prevent the dangerous chemical accidents caused by improper management and avoid the loss of people’s lives and property. Due to the influence of environment, traditional positioning technology and may cause poor positioning accuracy. And it was difficult to realize real-time and accurate monitoring of hazardous chemicals warehouse. The improved TDOA algorithm based on wavelet transform was very important to ensure the storage management of hazardous chemicals. Error elimination algorithm based on Wavelet Transform can be used to obtain better positioning accuracy in the case of zero mean Gauss random variables under a small error. In order to verify the effect of wavelet based TDOA positioning error elimination algorithm, T1P1 channel model was used for simulation analysis. The comparative analysis was carried out through the simulation results of Chan algorithm, LS algorithm and the improved wavelet location error elimination algorithm. It can be seen by comparison that the improved algorithm was more effective than other two kinds of algorithms in different radius range, measurement error and channel environment, which can improve the positioning accuracy effectively.