关键词：无线环境；RFID标签；定位系统；3D定位
摘 要：We propose a novel and inexpensive infrastructure for precise localization in non-line-of-sight wireless environments using RFID tags. The proposed system utilizes specialized tags that we term as supertags. Each supertag is an array of individual single antenna RFID tags closely spaced so as to emulate a “virtual” antenna array. Multiple such supertags are installed in a 3D environment where we are interested in localizing mobile agents equipped with an RFID reader.