ToA Positioning Algorithm for TDoA System Architecture

This paper is devoted to synthesis of algorithm of determining coordinates for navigation systems with TDoA architecture and testing it positioning accuracy comparing with standardly used TDoA algorithm. The proposed approach can be used in ultrasonic systems, passive radar systems, marine echolocation, LTE signal positioning, as well as in many other systems where TDoA architecture is implemented. The gain of proposed approach in positioning accuracy amounted to almost 30% in conducted simulation with different types of object movement on the example of UWB LPS. The paper is divided into 5 parts: Introduction, Types of UWB LPS infrastructure, ToA algorithm, modelling and analysis, and conclusion. In first section (Introduction)we aim to provide a comprehensive survey of different indoor localization techniques and technologies. In second section (Types of UWB LPS architecture) basic ranging methods and architectures in navigation radio system, as well as main factors affecting the positioning accuracy are presented. In third section (ToA algorithm) we describe in detail proposed approach of ToA positioning for TDoA-based systems. In fourth section (Modelling and analysis) obtained results of conducted simulation modelling, which tests proposed ToA algorithm, are shown. In conclusion, we summarize the studies described in paper, present the gain value obtained in modelling results and provide our further steps in work in this area.