6th International ICST Conference on Communications and Networking in China

Research Article

A Low-Complexity CFO Compensation Scheme for Uplink Interleaved OFDMA

  • @INPROCEEDINGS{10.1109/ChinaCom.2011.6158140,
        author={Jia Yang and Gang Wu and Xu He and Yue Xiao and Shaoqian Li},
        title={A Low-Complexity CFO Compensation Scheme for Uplink Interleaved OFDMA},
        proceedings={6th International ICST Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2012},
        month={3},
        keywords={carrier frequency offset (cfo) correction low-complexity uplink orthogonal frequency division multiple access (ofdma)},
        doi={10.1109/ChinaCom.2011.6158140}
    }
    
  • Jia Yang
    Gang Wu
    Xu He
    Yue Xiao
    Shaoqian Li
    Year: 2012
    A Low-Complexity CFO Compensation Scheme for Uplink Interleaved OFDMA
    CHINACOM
    IEEE
    DOI: 10.1109/ChinaCom.2011.6158140
Jia Yang1, Gang Wu1, Xu He1, Yue Xiao1, Shaoqian Li1,*
  • 1: University of Electronic Science and Technology of China
*Contact email: xun.luo.uestc@gmail.com

Abstract

In this paper, a improved low-complexity scheme is presented to compensate the multiple carrier frequency offsets (CFOs) in the uplink of interleaved orthogonal frequency division multiple access (OFDMA) systems. Based on the assumption that multiple CFOs is modeled as Gaussian variables [11][12], all the users are divided into two different sets, defined as large CFO users set (LCUS) and small CFO users set (SCUS) in the proposed scheme. Then, a joint CFO compensation algorithm for both LCUS and SCUS is proposed to make a better tradeoff between computational complexity and system performance. Simulation results show that the proposed scheme achieves a comparable system performance in terms of bit error rate compared to Zero-forcing (ZF) scheme and parallel interference cancellation (PIC) scheme whereas its computational complexity is much lower than the two conventional schemes.