Robust Time Synchronization Algorithm for IEEE 802.11ac WLAN Systems
Summary :
In this letter, a robust time synchronization algorithm is proposed for MIMO-OFDM based WLAN systems. IEEE 802.11ac MIMO-OFDM WLAN standard specifies that the preamble with cyclic shift diversity (CSD) scheme is used for time and frequency synchronization. However, since the CSD scheme introduces multiple cross-correlation peaks at the receiver, serious performance degradation appears if the conventional cross-correlation based algorithm is applied. In the proposed algorithm, the time synchronization error due to multiple peaks is compensated by adding the cross-correlation value to its reverse cyclic-shifted version. Simulation results show that the proposed algorithm achieves an SNR gain of 1.5 to 4.5dB for the synchronization failure rate of 10-2 compared with the existing algorithms.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E98-A No.1 pp.441-444
- Publication Date
- 2015/01/01
- Publicized
- Online ISSN
- 1745-1337
- DOI
- 10.1587/transfun.E98.A.441
- Type of Manuscript
- LETTER
- Category
- Communication Theory and Signals
Authors
Soohyun JANG
Korea Aerospace University
Jaeyoung ROH
Korea Aerospace University
Seongjoo LEE
Sejong University
Yunho JUNG
Korea Aerospace University
Keyword
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Soohyun JANG, Jaeyoung ROH, Seongjoo LEE, Yunho JUNG, "Robust Time Synchronization Algorithm for IEEE 802.11ac WLAN Systems" in IEICE TRANSACTIONS on Fundamentals,
vol. E98-A, no. 1, pp. 441-444, January 2015, doi: 10.1587/transfun.E98.A.441.
Abstract: In this letter, a robust time synchronization algorithm is proposed for MIMO-OFDM based WLAN systems. IEEE 802.11ac MIMO-OFDM WLAN standard specifies that the preamble with cyclic shift diversity (CSD) scheme is used for time and frequency synchronization. However, since the CSD scheme introduces multiple cross-correlation peaks at the receiver, serious performance degradation appears if the conventional cross-correlation based algorithm is applied. In the proposed algorithm, the time synchronization error due to multiple peaks is compensated by adding the cross-correlation value to its reverse cyclic-shifted version. Simulation results show that the proposed algorithm achieves an SNR gain of 1.5 to 4.5dB for the synchronization failure rate of 10-2 compared with the existing algorithms.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E98.A.441/_p
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@ARTICLE{e98-a_1_441,
author={Soohyun JANG, Jaeyoung ROH, Seongjoo LEE, Yunho JUNG, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Robust Time Synchronization Algorithm for IEEE 802.11ac WLAN Systems},
year={2015},
volume={E98-A},
number={1},
pages={441-444},
abstract={In this letter, a robust time synchronization algorithm is proposed for MIMO-OFDM based WLAN systems. IEEE 802.11ac MIMO-OFDM WLAN standard specifies that the preamble with cyclic shift diversity (CSD) scheme is used for time and frequency synchronization. However, since the CSD scheme introduces multiple cross-correlation peaks at the receiver, serious performance degradation appears if the conventional cross-correlation based algorithm is applied. In the proposed algorithm, the time synchronization error due to multiple peaks is compensated by adding the cross-correlation value to its reverse cyclic-shifted version. Simulation results show that the proposed algorithm achieves an SNR gain of 1.5 to 4.5dB for the synchronization failure rate of 10-2 compared with the existing algorithms.},
keywords={},
doi={10.1587/transfun.E98.A.441},
ISSN={1745-1337},
month={January},}
Copy
TY - JOUR
TI - Robust Time Synchronization Algorithm for IEEE 802.11ac WLAN Systems
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 441
EP - 444
AU - Soohyun JANG
AU - Jaeyoung ROH
AU - Seongjoo LEE
AU - Yunho JUNG
PY - 2015
DO - 10.1587/transfun.E98.A.441
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E98-A
IS - 1
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - January 2015
AB - In this letter, a robust time synchronization algorithm is proposed for MIMO-OFDM based WLAN systems. IEEE 802.11ac MIMO-OFDM WLAN standard specifies that the preamble with cyclic shift diversity (CSD) scheme is used for time and frequency synchronization. However, since the CSD scheme introduces multiple cross-correlation peaks at the receiver, serious performance degradation appears if the conventional cross-correlation based algorithm is applied. In the proposed algorithm, the time synchronization error due to multiple peaks is compensated by adding the cross-correlation value to its reverse cyclic-shifted version. Simulation results show that the proposed algorithm achieves an SNR gain of 1.5 to 4.5dB for the synchronization failure rate of 10-2 compared with the existing algorithms.
ER -
English
