Wireless Internet. 6th International ICST Conference, WICON 2011, Xi’an, China, October 19-21, 2011, Revised Selected Papers

Research Article

Study on Frequency Synchronization in 3GPP LTE System for FDD and TDD Modes

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  • @INPROCEEDINGS{10.1007/978-3-642-30493-4_19,
        author={Meilin Wang and Xin Qi and Limin Xiao and Min Huang and Ming Zhao},
        title={Study on Frequency Synchronization in 3GPP LTE System for FDD and TDD Modes},
        proceedings={Wireless Internet. 6th International ICST Conference, WICON 2011, Xi’an, China, October 19-21, 2011, Revised Selected Papers},
        proceedings_a={WICON},
        year={2012},
        month={10},
        keywords={3GPP LTE cell search dual-cell frequency synchronization},
        doi={10.1007/978-3-642-30493-4_19}
    }
    
  • Meilin Wang
    Xin Qi
    Limin Xiao
    Min Huang
    Ming Zhao
    Year: 2012
    Study on Frequency Synchronization in 3GPP LTE System for FDD and TDD Modes
    WICON
    Springer
    DOI: 10.1007/978-3-642-30493-4_19
Meilin Wang1,*, Xin Qi1, Limin Xiao1, Min Huang1, Ming Zhao1
  • 1: Tsinghua University
*Contact email: meilinwang@126.com

Abstract

In this paper, we propose a novel frequency synchronization method in 3GPP long term evolution (LTE) system downlink for both frequency division duplex (FDD) and time division duplex (TDD) modes. The proposed method includes coarse frequency offset estimation (FOE) using primary synchronization signal (PSS) based correlation in time domain, and fine FOE using phase difference between PSS and secondary synchronization signal (SSS) in frequency domain. Traditionally, cyclic prefix (CP) based method is widely used for fine FOE which is however sensitive to the time synchronization error and multi-path fading channel environment. The proposed fine FOE shows an apparent advantage in both FDD and TDD modes compared with CP based method. In addition, both theoretical analysis and simulation results show that the proposed fine FOE in TDD mode outperforms that in FDD mode under the same system assumptions. The simulations are done under a dual-cell scenario where there is co-frequency interference from the adjacent cell.