Practical Time Synchronization for OFDM Systems on Mobile Channel

被引：0

作者：

Hwang, Hyungu ^{[1
]}

Kim, Daeho ^{[1
]}

机构：

[1] Elect & Telecommun Res Inst, Mobile Telecommun Res Div, Taejon 305606, South Korea

来源：

2012 21ST INTERNATIONAL CONFERENCE ON COMPUTER COMMUNICATIONS AND NETWORKS (ICCCN) | 2012年

关键词：

DFT; multipath channel; OFDM; time tracking; time synchronization; FREQUENCY OFFSET;

D O I：

暂无

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

This paper presents practical time synchronization algorithm for mobile channel in wireless orthogonal frequency division multiplexing (OFDM) system such as 3G-LTE [1]. We first analyze the method of general time synchronization algorithm in OFDM systems. The analysis will show that the calculated time value for synchronization is unstable and inadequate. This instability of synchronization time value is generated by the variation of multipath channel in which max power path is changed with time. We show how proposed algorithm reduces the instability of synchronization time. Results of simulation show that proposed algorithm reduces the instability of synchronization time and improve time tracking performance considerably. Consequently demodulation performance is also enhanced and overall communication system can operate more efficiently. Because proposed timing synchronization algorithm decides synchronization time considering channel characteristics, controlled synchronization time is extremely stable. Especially, 16-QAM and 64-QAM modulation schemes for high data rate transmission is more sensitive to timing error, therefore proposed time synchronization algorithm supports to keep high data rate system performance stable.

引用

页数：5

共 50 条

[41] Time Synchronization Technique Hardware Implementation for OFDM Systems With Hermitian Symmetry for VLC Applications
Randy, Lozada D.
Sebastian, Betancourt P. Juan
Enrique, San Millan H.
IEEE ACCESS, 2023, 11 : 42222 - 42233
[42] Robust Synchronization Approach for MIMO-OFDM Systems with Space-Time Diversity
Nasraoui, Leila
Atallah, Leila Najjar
Siala, Mohamed
2015 IEEE 81ST VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING), 2015,
[43] A New Technique for Frame Synchronization of OFDM Systems
Pushpa, K.
Kishore, Ch. Nanda
Yoganandam, Y.
2009 ANNUAL IEEE INDIA CONFERENCE (INDICON 2009), 2009, : 47 - +
[44] A Robust Time-Frequency Synchronization Method for Underwater Acoustic OFDM Communication Systems
Yang, Chi
Wang, Lei
Peng, Cong
Zhang, Shuhao
Cui, Yonglin
Ma, Chaofei
IEEE ACCESS, 2024, 12 : 21908 - 21920
[45] Channel Estimation in Time and Frequency Domain in OFDM Systems
Taheri, Z.
Ardebilipour, M.
Mohammadi, M. A.
PROCEEDINGS OF THE 2009 INTERNATIONAL CONFERENCE ON WIRELESS NETWORKS AND INFORMATION SYSTEMS, 2009, : 209 - 212
[46] Overview on Synchronization in OFDM Systems
Parekha, Chandresh D.
Patel, Jayesh M.
2016 INTERNATIONAL CONFERENCE ON ADVANCES IN COMPUTING, COMMUNICATION AND AUTOMATION (ICACCA 2016), 2016, : 64 - 69
[47] ML MIMO-OFDM time synchronization/channel estimation for unknown frequency selective fading channels
Saemi, Amir
Meghdadi, Vahid
Cances, Jean-Pierre
Zahabi, M. Reza
Dumas, Jean-Michel
PROCEEDINGS ELMAR-2006, 2006, : 255 - +
[48] A combined channel estimation in time-frequency domain for OFDM system in mobile channel
Wang, DS
Zhu, GX
Hu, ZP
PIMRC 2003: 14TH IEEE 2003 INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS PROCEEDINGS, VOLS 1-3 2003, 2003, : 940 - 944
[49] An efficient carrier frequency synchronization algorithm combined with channel estimation in OFDM systems
Peng, Duan
Yin, Changchuan
Luo, Tao
Liu, Danpu
Yue, Guangxin
Global Mobile Congress 2005, 2005, : 309 - 314
[50] Channel length assisted symbol synchronization for OFDM systems in multipath fading channels
Chin, Wen-Long
EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING, 2011, : 1 - 11

← 1 2 3 4 5 →