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This paper presents an indoor positioning system called LOSNUS (LOcalization of Sensor Nodes by Ultra-Sound). It offers high accuracy of ~10 mm, a locating rate up to ~10 cycles/s and is applicable for both tracking mobile and locating static devices. LOSNUS is mainly designed to localize static devices especially in a wireless sensor network (WSN) with numerously deployed sensor/actuator devices...
Recently a new method of indoor ultrasonic localisation was introduced. It is called the phase accordance method and the authors claim that with this technology they could measure the 2D coordinates of the transmitter by a single receiver and a single transmission of ultrasound. Also this method is reported to be able to locate static objects more accurately than conventional methods. In this paper...
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