Peer-to-Peer Non-Line-of-Sight Localization System Scheme in GPS-denied Scenarios.

摘要

Under this project, a novel non-line-of-sight (NLOS) localization technique based on the concept of virtual reference device has been developed and tested experimentally in an indoor multipath environment. As compared to the conventional line of Sight (LOS) localization techniques which need at least three references devices (RD) with known locations in direct line of Sight (LOS) with the unknown mobile device (MD), the developed NLOS localization technique need just one RD to localize the unknown MD without the need of LOS and external references. In other words, it allows peer-to-peer NLOS localization in GPS denied scenarios. This is feasible through the use of virtual reference devices. The position of virtual reference device for each NLOS path can be determined if the initial MD position can be estimated or when the MD transits from LOS to NLOS region. With the position of virtual reference devices, the subsequent localization of MD requires only one signal path. Simulation and experiment conducted in indoor multipath environment show that the performance of the developed NLOS localization technique surpasses the existing localization schemes by a significant margin at all simulated and measured locations by using just one RD and one dominant path.