Robust timing synchronization for full duplex communications: Design and implementation

Min Keun Chung; Liang Liu; Ove Edfors; Dong Ku Kim; Chan Byoung Chae

doi:10.1109/GlobalSIP.2017.8309087

Robust timing synchronization for full duplex communications: Design and implementation

Min Keun Chung, Liang Liu, Ove Edfors, Dong Ku Kim, Chan Byoung Chae

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

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 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.

Original language	English
Title of host publication	2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	883-887
Number of pages	5
ISBN (Electronic)	9781509059904
DOIs	https://doi.org/10.1109/GlobalSIP.2017.8309087
Publication status	Published - 2018 Mar 7
Event	5th IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Montreal, Canada Duration: 2017 Nov 14 → 2017 Nov 16

Publication series

Name	2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings
Volume	2018-January

Other

Other	5th IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017
Country/Territory	Canada
City	Montreal
Period	17/11/14 → 17/11/16

Bibliographical note

Funding Information:
V. CONCLUSIONS We presented a new timing synchronization method for full-duplex communication systems, using the desired and self-interference signals of each user. As proof-of-concept, by implementing the proposed method on our full-duplex SISO/MIMO link prototype, we experimentally verified that the NSP index switching achieved high probability of timing synchronization success. We believe our initial test results provide worthwhile insights for the development of a more viable full-duplex radio. ACKNOWLEDGMENT This work was supported by Institute for Information & Communications Technology Promotion(IITP) grant funded by the Korea government(MSIT) (2015-0-00300, Multiple Access Technique with Ultra-Low Latency and High Efficiency for Tactile Internet Services in IoT Environments).

Publisher Copyright:
© 2017 IEEE.

All Science Journal Classification (ASJC) codes

Information Systems
Signal Processing

Access to Document

10.1109/GlobalSIP.2017.8309087

Cite this

Chung, M. K., Liu, L., Edfors, O., Kim, D. K., & Chae, C. B. (2018). Robust timing synchronization for full duplex communications: Design and implementation. In 2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings (pp. 883-887). (2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings; Vol. 2018-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/GlobalSIP.2017.8309087

Chung, Min Keun ; Liu, Liang ; Edfors, Ove et al. / Robust timing synchronization for full duplex communications : Design and implementation. 2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. pp. 883-887 (2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings).

@inproceedings{e9bf718c8124412bab320d4c8e9f82ca,

title = "Robust timing synchronization for full duplex communications: Design and implementation",

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 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.",

author = "Chung, {Min Keun} and Liang Liu and Ove Edfors and Kim, {Dong Ku} and Chae, {Chan Byoung}",

note = "Funding Information: V. CONCLUSIONS We presented a new timing synchronization method for full-duplex communication systems, using the desired and self-interference signals of each user. As proof-of-concept, by implementing the proposed method on our full-duplex SISO/MIMO link prototype, we experimentally verified that the NSP index switching achieved high probability of timing synchronization success. We believe our initial test results provide worthwhile insights for the development of a more viable full-duplex radio. ACKNOWLEDGMENT This work was supported by Institute for Information & Communications Technology Promotion(IITP) grant funded by the Korea government(MSIT) (2015-0-00300, Multiple Access Technique with Ultra-Low Latency and High Efficiency for Tactile Internet Services in IoT Environments). Publisher Copyright: {\textcopyright} 2017 IEEE.; 5th IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 ; Conference date: 14-11-2017 Through 16-11-2017",

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doi = "10.1109/GlobalSIP.2017.8309087",

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Chung, MK, Liu, L, Edfors, O, Kim, DK & Chae, CB 2018, Robust timing synchronization for full duplex communications: Design and implementation. in 2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings. 2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings, vol. 2018-January, Institute of Electrical and Electronics Engineers Inc., pp. 883-887, 5th IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017, Montreal, Canada, 17/11/14. https://doi.org/10.1109/GlobalSIP.2017.8309087

Robust timing synchronization for full duplex communications: Design and implementation. / Chung, Min Keun; Liu, Liang; Edfors, Ove et al.
2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. p. 883-887 (2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings; Vol. 2018-January).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Chung, Min Keun

AU - Liu, Liang

AU - Edfors, Ove

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AU - Chae, Chan Byoung

N1 - Funding Information: V. CONCLUSIONS We presented a new timing synchronization method for full-duplex communication systems, using the desired and self-interference signals of each user. As proof-of-concept, by implementing the proposed method on our full-duplex SISO/MIMO link prototype, we experimentally verified that the NSP index switching achieved high probability of timing synchronization success. We believe our initial test results provide worthwhile insights for the development of a more viable full-duplex radio. ACKNOWLEDGMENT This work was supported by Institute for Information & Communications Technology Promotion(IITP) grant funded by the Korea government(MSIT) (2015-0-00300, Multiple Access Technique with Ultra-Low Latency and High Efficiency for Tactile Internet Services in IoT Environments). Publisher Copyright: © 2017 IEEE.

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N2 - 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.

AB - 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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Chung MK, Liu L, Edfors O, Kim DK , Chae CB. Robust timing synchronization for full duplex communications: Design and implementation. In 2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2018. p. 883-887. (2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings). doi: 10.1109/GlobalSIP.2017.8309087

Robust timing synchronization for full duplex communications: Design and implementation

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