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Robust timing synchronization for full duplex communications : Design and implementation

Chung, Min Keun LU ; Liu, Liang LU orcid ; Edfors, Ove LU orcid ; 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
; ; ; and
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
IEEE - 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
2023-09-08 03:19:13
@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}},
  booktitle    = {{2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings}},
  isbn         = {{9781509059904}},
  keywords     = {{Full duplex communications; software-defined radio implementation; timing synchronization}},
  language     = {{eng}},
  month        = {{03}},
  pages        = {{883--887}},
  publisher    = {{IEEE - 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}},
  doi          = {{10.1109/GlobalSIP.2017.8309087}},
  volume       = {{2018-January}},
  year         = {{2018}},
}