Title:Anti-Collision Technique of SAW ID Tags at Unknown Temperature using Integer ProgrammingAuthor(s):Maria Anneliese Brandl, Stefan Schuster, Stefan Scheiblhofer, Andreas StelzerAbstract:Based on a synchronous separation method, a new identification algorithm for separating multiple asynchronous surface acoustic wave identification tags at variable unknown temperature is presented. For identification of the codes, the estimation of the reflector delays (round-trip delay-times RTDTs) is necessary. Reading out multiple tags simultaneously, these impulse response patterns superpose and the assignment between reflectors and tags is lost. Furthermore, the answer and as a consequence, the RTDTs of the tags are scaled, thus stretched or compressed due to external effects, e.g., temperature. The radial tag position results in a shift of the impulse response and is handled as an offset. These parameters are usually unknown. In this paper, a novel technique is introduced, which estimates the offsets, scalings, and codes.Booktitle:Proc. IEEE International Ultrasonics Symposium 2009ISBN:978-1-4244-4389-5ISSN:1948-5719Page Reference:page 698 - 701, 4 page(s)Publishing:9/2009Series:Proc. of the IEEE International Ultrasonics Symposium (IUS), 2009