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5.1 Software-De?¬?ned RFID Reader
Wireless communication is becoming softer and softer. This means that radios, terminals,
and networks are becoming recon?¬?gurable and programmable. Software and cognitive
radios are becoming one of the big trends in this ?¬?eld. Although these concepts have been
studied for decades, many challenges remain making this vision a reality. In this work we
study several aspects of a software-based RFID reader, including experimentation, implementation,
and theoretical work.
5.1.1 Introduction
RFID systems are demanding more data, faster logging, and higher interrogation rates, so
they require a powerful system that can manage information from a variety of sources,
store the data, and transmit it reliably and continuously for long periods of time to other
readers or a host PC. In addition, data logging is an extremely important part of RFID
because it is the best method for determining what happens during the tag interrogation
and for testing software strategies and protocol ef?¬?ciencies. In the near future, software
will do much more than running a fancy graphical user interface (GUI). More and more of
the functionality of traditional radio systems will be implemented in software.
5.1.2 Problem Statement
When one hears the litany of reliability and readability woes that plague RFID in the
supply chain arena, it is possible to wonder if anyone is making any progress.
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