| Publisher | National Institute of Information and Communications Technology | ||
|---|---|---|---|
| Format | 173.5KB PDF | Date added | 09 Aug 2005 |
| Topics | RFID, Mobile - Wireless Communications | ||
| Downloads | 12 | ||
This paper presents a design of N-ary Pulse Position Modulation active RFID system for monitoring of large number and high density objects. The transmission-only tags chirp burst frames in pure ALOHA manner. A burst frame consists of delimiter and at least two duplication blink units. The slot mapping and intervals between blink units are solely determined by the delimiter. The interrogator segments composite pulse streams as per delimiter and performs cross-correlation to extract overlapped blink units. Tags can be read in registration state or pattern matching state.
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