Facilitating an Active Transmit-only RFID System Through Receiver-based Processing

— Many asset tracking applications demand long-lived, low-cost, and continuous monitoring of a large number of items, which has posed a significant challenge to today’s RFID design. In order to satisfy these requirements, we propose to adopt transmit-only tags without a receiver, which can offer both low power and low cost. In spite of their great potential, such a platform faces many challenges since it cannot sense the channel, causing the collisions among tag transmissions to be high. It is thus crucial to employ effective multi-user detection schemes at the tag reader to extract valid information from collided signals. Traditional detection schemes, such as successive cancelation, cannot be directly applied to the targeted system. Firstly, due to the simplicity of receiver-less transmit-only tags, there is no mechanism for feedback to the tags that is traditionally needed for accurate multi-user detection. More importantly, these schemes impose serious processing and memory re...

• Type: Conference
• Year: 2007
• Where: SECON
• Authors: Yu Zhang, Gautam D. Bhanage, Wade Trappe, Yanyong Zhang, Richard Howard
• Keywords: Detection Schemes, Multi-user Detection, SECON 2007, Transmit-only Tags