utilizing physical layer information to improve rfid tag
utilizing physical layer information to improve rfid tag
utilizing physical layer information to improve rfid tag
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LIST OF FIGURES<br />
Figure Page<br />
2.1 RFID system setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5<br />
2.2 Alien Squiggle Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7<br />
2.3 Avery Dennison Bow-Tie Tag . . . . . . . . . . . . . . . . . . . . . . 7<br />
3.1 Slot count (Q) selection algorithm [1] . . . . . . . . . . . . . . . . . . 10<br />
3.2 Inven<strong>to</strong>ry sequence [1] . . . . . . . . . . . . . . . . . . . . . . . . . . 10<br />
3.3 Tag <strong>to</strong> reader data encoding [1] . . . . . . . . . . . . . . . . . . . . . 11<br />
4.1 Two functioned estimation algorithm [2] . . . . . . . . . . . . . . . . 14<br />
5.1 Passive <strong>tag</strong> structure . . . . . . . . . . . . . . . . . . . . . . . . . . . 17<br />
5.2 RCS states in <strong>tag</strong> waveform . . . . . . . . . . . . . . . . . . . . . . . 18<br />
5.3 Conventional radio receiver . . . . . . . . . . . . . . . . . . . . . . . . 18<br />
5.4 Software defined radio . . . . . . . . . . . . . . . . . . . . . . . . . . . 19<br />
5.5 Digital down converter . . . . . . . . . . . . . . . . . . . . . . . . . . 19<br />
5.6 RN16 waveform of <strong>tag</strong> . . . . . . . . . . . . . . . . . . . . . . . . . . 20<br />
5.7 I-Q plot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21<br />
5.8 2 <strong>tag</strong> collision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21<br />
6.1 RN16 signal I-Q plot . . . . . . . . . . . . . . . . . . . . . . . . . . . 23<br />
6.2 3 <strong>tag</strong> collision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24<br />
6.3 4 <strong>tag</strong> collision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25<br />
6.4 Overlapping RCS states . . . . . . . . . . . . . . . . . . . . . . . . . . 26<br />
6.5 Collision detection accuracy . . . . . . . . . . . . . . . . . . . . . . . 26<br />
6.6 Performance comparison for the 4 algorithms . . . . . . . . . . . . . . 29<br />
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