Method for the Real-Time Localization of Passive Saw-Based RFID Systems Around Corners

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Executive Summary

Recently, there has been significant interest within the Radio Frequency IDentification (RFID) field for localization initiatives using passive or battery-less systems. Previously, much work has been reported using active or battery powered systems to enable localization of a tag or object in space. However, there has been a negligible amount of discoveries in the passive RFID realm regarding Real-Time Localization Systems (RTLS) due in part to the inability of passive tags to self-determine location. This lack of resource has been previously blamed on the power hungry architecture of localization techniques, and on the inability of Asynchronous Silicon Integrated Chips (ASIC) to allow Time-Of-Flight (TOF) information.

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