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Code division multiple access/pulse position modulation ultra‐wideband radio frequency identification for Internet of Things: concept and analysis
Author(s) -
Zhang Zhi,
Lu Zhonghai,
Chen Qiang,
Yan Xiaolang,
Zheng Li-Rong
Publication year - 2012
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.2312
Subject(s) - computer science , throughput , pulse position modulation , ultra wideband , radio frequency identification , asynchronous communication , code (set theory) , computer network , real time computing , electronic engineering , wireless , telecommunications , pulse (music) , pulse amplitude modulation , detector , computer security , set (abstract data type) , programming language , engineering
SUMMARY Radio frequency identification (RFID) is a compelling technology for Internet of Things (IoT). Ultra‐wideband (UWB) technology is one promising wireless technique for future RFID, especially for high‐throughput sensing applications. On‐off keying UWB RFID system provides high pulse rate but suffers severe collisions that limit the system throughput. This paper proposes to utilize low pulse rate code division multiple access/pulse position modulation UWB in the tag‐to‐reader link to provide multiple tag access capability and build a high‐throughput RFID system for IoT. We analyze asynchronous matched filter receiver and decorrelating receiver for multi‐tag detection and design an effective medium access control scheme to optimize the network throughput. We propose an effective dynamic frame size adjustment algorithm on the basis of theoretical analysis and determine the preferable length of Gold codes. With a similar data rate, the throughput of the proposed system using the decorrelating receiver is 8.6 times higher than that of the electronic product code class 1 generation 2 system. Only using 1/10 pulse rate and 1/15 data rate, the proposed system outperforms the on‐off keying UWB RFID system 1.4 times in terms of throughput. Copyright © 2012 John Wiley & Sons, Ltd.