Source localization plays a key role in many applications including radar, wireless and underwater communications. Among various methods, the most popular ones are Time-Of-Arrival (TOA), Time-Difference-Of-Arrival (TDOA), Angle-Of-Arrival (AOA) Received Signal Strength (RSS) based. Since Cramér-Rao lower bounds (CRLB) of these methods depend on sensor geometry explicitly, placement becom...

Direction of arrival (DOA) and time difference (TDOA) hybrid localisation is an effective technique. Station position errors affect performance. Owing to the highly non-linear nature problem, there are few methods DOA/TDOA in presence station errors. Hence, iterative constrained weighted least squares (ICWLS) algorithm proposed estimate locations multiple targets stations for with To ensure con...

This paper discusses an ultra-wideband (UW) tracking system design effort for Mini-AERCam (Autonomous Extra-vehicular Robotic Camera), a free-flying video camera system under development at NASA Johnson Space Center for aid in surveillance around the International Space Station (ISS). UWB technology is exploited to implement the tracking system due to its properties, such as high data rate, fin...

The technology of wireless sensor networks (WSNs) is developing rapidly, and it has been applied in diverse fields, such as medicine, environmental control, climate prediction, monitoring, etc. Location one the critical fields WSNs. Time difference arrival (TDOA) widely used to locate targets because a simple model, easy implement. Aiming at problems large deviation low accuracy nonlinear equat...

This article designs and implements a 3D moving target positioning tracking system by using ultrawideband (UWB) technology. The result of the two-way ranging time difference arrival (TWR-TDOA) algorithm is adopted to in new resolution that resolve hyperbolic equations. proposed applied outdoor indoor scenarios. To minimize effect sensor layout, this proposes simplified multi-population genetic ...

This paper describes a design effort for a prototype ultra-wideband (UWB) tracking system that is currently under development at NASA Johnson Space Center (JSC). The system is being studied for use in tracking of lunar/Mars rovers during early exploration missions when satellite navigation systems are not available. The UWB technology is exploited to implement the tracking system due to its pro...

Device or node localization is one of the important issues to be resolved in 5G Utra-Dense network. Accurate measurement techniques using conventional Time of Arrival (ToA), Time Difference of Arrival (TDoA), Angle of Arrival (AoA) and Received Signal Strength Indicator (RSSI) can be adopted to enhance localization accuracy. However, with the introduction of MIMO to increase spectral efficiency...

Location based services (LBS) provided by wireless sensor networks have garnered a great deal of attention from researchers and developers in recent years. Chirp spread spectrum (CSS) signaling formatting with time difference of arrival (TDOA) ranging technology is an effective LBS technique in regards to positioning accuracy, cost, and power consumption. The design and implementation of the lo...

The rapid development of wireless broadband communication technology has affected the location accuracy of worldwide radio monitoring stations that employ time-difference-of-arrival (TDOA) location technology. In this study, TDOA-based location technology was implemented in Taiwan for the first time according to International Telecommunications Union Radiocommunication (ITU-R) recommendations r...