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Design and optimization of a CDMA-based multi-reader passive UHF RFID system for dense scenarios

Zhang, Zhi LU ; Lu, Zhonghai; Chen, Qiang and Yan, Xiaolang (2012) In IEICE Transactions on Communications E95-B(01). p.206-216
Abstract
In dense passive radio frequency identification (RFID) systems, code division multiple access (CDMA) techniques can be used to alleviate severe collisions and thus enhance the system performance. However, conventional CDMA techniques are challenging to implement, especially for passive tags due to cost and power constraints. In this paper, we design a CDMA-based multi-reader passive ultra high frequency (UHF) RFID system in which a reader detects only the strongest tag signal and a tag uses Gold codes only on the preamble and the data bits of RN16 without increasing its clock frequency. We present a new communication procedure based on dynamic framed slotted ALOHA (DFSA). In order to optimize the system, we theoretically analyze the system... (More)
In dense passive radio frequency identification (RFID) systems, code division multiple access (CDMA) techniques can be used to alleviate severe collisions and thus enhance the system performance. However, conventional CDMA techniques are challenging to implement, especially for passive tags due to cost and power constraints. In this paper, we design a CDMA-based multi-reader passive ultra high frequency (UHF) RFID system in which a reader detects only the strongest tag signal and a tag uses Gold codes only on the preamble and the data bits of RN16 without increasing its clock frequency. We present a new communication procedure based on dynamic framed slotted ALOHA (DFSA). In order to optimize the system, we theoretically analyze the system performance in terms of slot capacity and identification rate, and formally show how the code length and the number of readers affect the identification rate. Furthermore, we propose an effective method for tag estimation and frame size adjustment, and validate it via simulations. Through an example, we demonstrate how the analysis-based technique can be used to optimize the system configurations with respect to the number of readers and the number and length of Gold codes. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
IEICE Transactions on Communications
volume
E95-B
issue
01
pages
206 - 216
publisher
IEICE
external identifiers
  • scopus:84855306035
ISSN
1745-1345
language
English
LU publication?
no
id
108e772b-2fae-4b98-8e73-e0e9a20df227 (old id 5147412)
date added to LUP
2015-03-03 15:21:05
date last changed
2017-01-01 07:43:22
@article{108e772b-2fae-4b98-8e73-e0e9a20df227,
  abstract     = {In dense passive radio frequency identification (RFID) systems, code division multiple access (CDMA) techniques can be used to alleviate severe collisions and thus enhance the system performance. However, conventional CDMA techniques are challenging to implement, especially for passive tags due to cost and power constraints. In this paper, we design a CDMA-based multi-reader passive ultra high frequency (UHF) RFID system in which a reader detects only the strongest tag signal and a tag uses Gold codes only on the preamble and the data bits of RN16 without increasing its clock frequency. We present a new communication procedure based on dynamic framed slotted ALOHA (DFSA). In order to optimize the system, we theoretically analyze the system performance in terms of slot capacity and identification rate, and formally show how the code length and the number of readers affect the identification rate. Furthermore, we propose an effective method for tag estimation and frame size adjustment, and validate it via simulations. Through an example, we demonstrate how the analysis-based technique can be used to optimize the system configurations with respect to the number of readers and the number and length of Gold codes.},
  author       = {Zhang, Zhi and Lu, Zhonghai and Chen, Qiang and Yan, Xiaolang},
  issn         = {1745-1345},
  language     = {eng},
  number       = {01},
  pages        = {206--216},
  publisher    = {IEICE},
  series       = {IEICE Transactions on Communications},
  title        = {Design and optimization of a CDMA-based multi-reader passive UHF RFID system for dense scenarios},
  volume       = {E95-B},
  year         = {2012},
}