M. Hazas and A. Ward, "A Novel Broadband Ultrasonic Location System," Proc. UbiComp: Ubiquitous Computing, pp. 264-280, Sept. 2002. Home/Search Document Details and Download
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The Lighthouse Location System for Smart Dust - Römer (2003) (1 citation) (Correct)
....a top view Figure 3: Top and side view of an idealistic lighthouse with a parallel beam of light. points. Moreover, placement of these so called beacons is often a non trivial problem [5] Usually, the exact locations of these reference points have to be known in order to compute node locations [4, 14, 22, 27]. In some systems, the beacons even need accurately synchronized clocks [17] In order to avoid these problems, we developed a new localization approach based on cylindrical lateration, which does not have a wide baseline requirement. Another important overhead involved in setting up a ....
....and taxonomy of such location systems. These systems all involve gathering data by sensing realworld physical quantities. The data is in turn used to compute a location estimate. Common systems use diffuse infrared light [24, 25, 26] visible light [8, 9, 30] laser light [20, 21] ultrasound [11, 12, 14, 22, 23, 27], and radio waves [2, 3, 4, 17] Some systems have been specifically designed for use in multi hop wireless ad hoc and sensor networks [3, 4, 6, 10, 12, 23] and do not require any external hardware infrastructure besides the nodes of the network itself. Other systems rely on an external ....
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M. Hazas and A. Ward. A Novel Broadband Ultrasonic Location System. In Ubicomp 2002.
Location of Mobile Devices Using Networked Surfaces - Hoffmann, Scott (2002) (1 citation) (Correct)
....which are attached to devices or carried by users, measure the time of flight of the ultrasonic pulse to estimate the distance to the beacon. The system can estimate postitions to within two metres, and by using multiple receivers can determine orientation to an accuracy of 3 . The Dolphin system [9] is similar to the Active Bat system, but uses broadband ultrasonic transmissions. This allows it to achieve robustness in the presence of ultrasonic noise, and to allow multiple transmitters to send simultaneously, which are properties not shared by the two narrowband systems described above. The ....
Mike Hazas and Andy Ward. A novel broadband ultrasonic location system. In Proceedings of Ubicomp 2002.
Broadband Ultrasonic Location Systems for - Improved Indoor Positioning Self-citation (Hazas) (Correct)
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M. Hazas and A. Ward, "A Novel Broadband Ultrasonic Location System," Proc. UbiComp: Ubiquitous Computing, pp. 264-280, Sept. 2002.
A High-Performance Privacy-Oriented Location System - Hazas, Ward (2003) (1 citation) Self-citation (Hazas Ward) (Correct)
....system which utilizes broadband ultrasonic transmitters and receivers to avoid the above limitations. With a broadband ultrasonic channel, multiple access signals can be employed. Although we have previously described a broadband centralized system which has some similar attributes [3], the system presented in this paper has a fundamentally different operation, and affords new advantages for privacy oriented location awareness. 3. System principles In this section, we discuss the architecture, signaling scheme, and positioning algorithms of the proposed privacy oriented ....
....a simple installation involving only placement and surveying, but periodic battery replacement for the transmitter units will be needed. 4. Prototype implementation Prototype broadband ultrasonic transmitters and receivers, collectively referred to as Dolphin units, have been previously described [3]. The units employ piezopolymer film transducers to achieve much higher bandwidths than piezoceramic transducers. The above noise bandwidth of the ultrasonic channel between a Dolphin transmitter and receiver was shown to be about 75 kHz at one meter, although at room scale distances the ....
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M. Hazas and A. Ward. A novel broadband ultrasonic location system. In Proceedings of UbiComp 2002.
Location Privacy In Ubiquitous Computing - Beresford (2005) (2 citations) (Correct)
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Mike Hazas and Andy Ward. A novel broadband ultrasonic location system. In Proceedings of the Fourth International Conference on Ubiquitous Computing (UbiComp), volume 2498, pages 264--280. Springer-Verlag, September 2002. (Ref: p. 22.)
RF Free Ultrasonic Positioning - McCarthy, Muller (2003) (Correct)
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M. Hazas and A. Ward. A novel broadband ultrasonic location system. In G. Borriello and L. E. Holmquist, editors, UbiComp 2002.
Human Presence Detection by Smart Devices - Raducanu, Subramanian, Markopoulos (2004) (Correct)
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Hazas M., Ward A., "A Novel Broadband Ultrasonic Location System", Proceedings of Ubicomp2002, pp. 264-280, Sweden, 2002
Solar: Building a Context Fusion Network for Pervasive Computing - Chen (2004) (Correct)
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Mike Hazas and Andy Ward. A Novel Broadband Ultrasonic Location System. In Proceedings of the Fourth International Conference on Ubiquitous Computing, pages 264--280, Goteborg, Sweden, September-October 2002. Springer-Verlag.
Solar: Building a Context Fusion Network for Pervasive Computing - Chen (2004) (Correct)
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Mike Hazas and Andy Ward. A Novel Broadband Ultrasonic Location System. In Proceedings of the Fourth International Conference on Ubiquitous Computing, pages 264--280, Goteborg, Sweden, September-October 2002. Springer-Verlag.
The Lighthouse Location System for Smart Dust - Römer (2003) (1 citation) (Correct)
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M. Hazas and A. Ward. A Novel Broadband Ultrasonic Location System. In Ubicomp 2002.
Ultrasonic 3D Position Estimation Using a Single Base.. - Dijk, van Berkel.. (Correct)
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Hazas, M., Ward, A.: A Novel Broadband Ultrasonic Location System. In: Proc. Int. Conf. on Ubiquitous Computing. (2002) 264--280
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