Robust timing synchronization for full duplex communications: Design and implementation

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

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.

Details

Authors
Organisations
External organisations
  • Yonsei University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Telecommunications

Keywords

  • Full duplex communications, software-defined radio implementation, timing synchronization
Original languageEnglish
Title of host publication2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages883-887
Number of pages5
Volume2018-January
ISBN (Electronic)9781509059904
Publication statusPublished - 2018 Mar 7
Publication categoryResearch
Peer-reviewedYes
Event5th IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Montreal, Canada
Duration: 2017 Nov 142017 Nov 16

Conference

Conference5th IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017
CountryCanada
CityMontreal
Period2017/11/142017/11/16