Broadband ultrasonic location systems for improved indoor positioning

By Mike Hazas, A. Hopper. IEEE Transactions on Mobile Computing, 2006

396 citations recorded by the source corpus.

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A Survey on Wireless Indoor Localization from the Device Perspective (2016, methodology): “Instead, Hazas and Hopper [2006] explore the usage of broadband ultrasonic that has superior characteristics over the narrowband counterpart. Such a broadband ultrasonic system is deployed using Dolphin units and the ranging performance is 2cm. Itagaki et al. [2012] develop a moving object tracking ”
Kernel-Based Positioning in Wireless Local Area Networks (2007, background): “In this light, a plethora of indoor positioning systems have been proposed, employing various technologies [10], [11] such as proximity sensors, infrared [12], radio frequency and ultrasonic badges [13], [14], Wireless Local Area Network (WLAN) radio signals [15], [16], and visual sensors [17].”
A Review of Wearable Technologies for Elderly Care that Can Accurately Track Indoor Position, Recognize Physical Activities and Monitor Vital Signs in Real Time (2017, background): “A pulse outside the human audible range is emitted by a speaker tag attached to the user and received by a series of microphones installed in ceilings [47].”
Indoor Positioning Technologies (2012, background): “Another negative influence on ranging accuracy is the near‐far problem of transmitters (see Chapter 12) and the directivity of the transducers (Hazas and Hopper 2006).”