A time difference of arrival/angle of arrival fusion algorithm with steepest descent algorithm for indoor non-line-of-sight locationing. (September 2019)

• Record Type: Journal Article
• Authors: Shen, Chong; Wang, Chengxiao; Zhang, Kun; Wang, Xianpeng; Liu, Jing
• Is Part Of: International journal of distributed sensor networks. Volume 15:Number 9(2019)
• Publication Date: 2019-09
• Subjects: Ultra-wideband positioning -- time difference of arrival/angle of arrival fusion algorithm -- non-line-of-sight -- steepest descent algorithm; Sensor networks -- Periodicals; Intelligent agents (Computer software) -- Periodicals; Multisensor data fusion -- Periodicals; 681.2
• DOI: 10.1177/1550147719860354
• Languages: English
• ISSNs: 1550-1329

Abstract

In complex indoor propagation environment, the non-line-of-sight error caused by various obstacles brings great error to node positioning. Choosing the appropriate signal transmission methods is important to improve node indoor positioning accuracy. In this research, ultra-wideband technology, as baseband with high theoretical positioning accuracy and real-time performance, is implemented to transmit indoor signals. The proposed fusion algorithm with ultra-wideband baseband takes advantages from both time difference of arrival and angle of arrival algorithms, combined through the steepest descent algorithm. The non-line-of-sight signal estimation error is iteratively eliminated to achieve effective positioning accuracy. The experimental results indicate that the novel time difference of arrival/angle of arrival fusion algorithm with steepest descent algorithm can largely improve node positioning accuracy and stability.