| Volumes Volume 7 Contents of Current Session |
www.adv-radio-sci.net/7/55/2009/
doi:10.5194/ars-7-55-2009
© Author(s) 2009. This work is distributed
under the Creative Commons Attribution 3.0 License.
Cooperative multi-user detection and ranging based on pseudo-random codes
Fachgebiet Höchstfrequenztechnik, Technische Universität München, Munich, Germany
Abstract. We present an improved approach for a Round Trip Time of Flight distance measurement system. The system is intended for the usage in a cooperative localisation system for automotive applications. Therefore, it is designed to address a large number of communication partners per measurement cycle. By using coded signals in a time divison multiple access order, we can detect a large number of pedestrian sensors with just one car sensor. We achieve this by using very short transmit bursts in combination with a real time correlation algorithm. Futhermore, the correlation approach offers real time data, concerning the time of arrival, that can serve as a trigger impulse for other comunication systems. The distance accuracy of the correlation result was further increased by adding a fourier interpolation filter. The system performance was checked with a prototype at 2.4 GHz. We reached a distance measurement accuracy of 12 cm at a range up to 450 m.
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Citation: Morhart, C. and Biebl, E. M.: Cooperative multi-user detection and ranging based on pseudo-random codes, Adv. Radio Sci., 7, 55-59, doi:10.5194/ars-7-55-2009, 2009. Bibtex EndNote Reference Manager XML
