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Robust timing synchronization for full duplex communications : Design and implementation

Chung, Min Keun LU ; Liu, Liang LU ; Edfors, Ove LU ; Kim, Dong Ku and Chae, Chan Byoung (2018) 5th IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 2018-January. p.883-887
Abstract

This paper presents a robust timing synchronization method for full duplex orthogonal frequency division multiplexing (OFDM) systems based on Long Term Evolution (LTE). The proposed method contains two essential steps: 1) time alignment between the desired signal and self-interference 2) normalized synchronization peak (NSP) index switching. The time alignment is to make the difference in arrival times of the desired signal and the self-interference signal within cyclic prefix (CP) duration of an OFDM symbol, exploiting a time advance, thereby adopting low-complexity, frequency domain self-interference cancellation and decoding. In the second step, to improve the probability of successful time synchronization, a Zadoff-Chu sequence with... (More)

This paper presents a robust timing synchronization method for full duplex orthogonal frequency division multiplexing (OFDM) systems based on Long Term Evolution (LTE). The proposed method contains two essential steps: 1) time alignment between the desired signal and self-interference 2) normalized synchronization peak (NSP) index switching. The time alignment is to make the difference in arrival times of the desired signal and the self-interference signal within cyclic prefix (CP) duration of an OFDM symbol, exploiting a time advance, thereby adopting low-complexity, frequency domain self-interference cancellation and decoding. In the second step, to improve the probability of successful time synchronization, a Zadoff-Chu sequence with a different root index is used for the primary synchronization signal at each node. To validate the proposed method with experimental evidence, we implement a full duplex physical layer (PHY) on an FPGA-based software-defined radio (SDR) platform. It is shown that our full duplex OFDM synchronizer is flexible and robust, in a real-world wireless channel, compared to existing synchronization method.

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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Full duplex communications, software-defined radio implementation, timing synchronization
host publication
2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings
volume
2018-January
pages
5 pages
publisher
Institute of Electrical and Electronics Engineers Inc.
conference name
5th IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017
conference location
Montreal, Canada
conference dates
2017-11-14 - 2017-11-16
external identifiers
  • scopus:85048040640
ISBN
9781509059904
DOI
10.1109/GlobalSIP.2017.8309087
language
English
LU publication?
yes
id
b9380cba-c22f-4015-ac92-983a44cb3140
date added to LUP
2018-06-20 13:59:12
date last changed
2019-02-20 11:20:30
@inproceedings{b9380cba-c22f-4015-ac92-983a44cb3140,
  abstract     = {<p>This paper presents a robust timing synchronization method for full duplex orthogonal frequency division multiplexing (OFDM) systems based on Long Term Evolution (LTE). The proposed method contains two essential steps: 1) time alignment between the desired signal and self-interference 2) normalized synchronization peak (NSP) index switching. The time alignment is to make the difference in arrival times of the desired signal and the self-interference signal within cyclic prefix (CP) duration of an OFDM symbol, exploiting a time advance, thereby adopting low-complexity, frequency domain self-interference cancellation and decoding. In the second step, to improve the probability of successful time synchronization, a Zadoff-Chu sequence with a different root index is used for the primary synchronization signal at each node. To validate the proposed method with experimental evidence, we implement a full duplex physical layer (PHY) on an FPGA-based software-defined radio (SDR) platform. It is shown that our full duplex OFDM synchronizer is flexible and robust, in a real-world wireless channel, compared to existing synchronization method.</p>},
  author       = {Chung, Min Keun and Liu, Liang and Edfors, Ove and Kim, Dong Ku and Chae, Chan Byoung},
  isbn         = {9781509059904},
  keyword      = {Full duplex communications,software-defined radio implementation,timing synchronization},
  language     = {eng},
  location     = {Montreal, Canada},
  month        = {03},
  pages        = {883--887},
  publisher    = {Institute of Electrical and Electronics Engineers Inc.},
  title        = {Robust timing synchronization for full duplex communications : Design and implementation},
  url          = {http://dx.doi.org/10.1109/GlobalSIP.2017.8309087},
  volume       = {2018-January},
  year         = {2018},
}