1st International ICST Conference on Communications and Networking in China

Research Article

An Improved Music Algorithm for Carrier Frequency Offset Estimator in the Uplink of IFDMA System

  • @INPROCEEDINGS{10.1109/CHINACOM.2006.344910,
        author={Yirong Wang and Wenbo Wang},
        title={An Improved Music Algorithm for Carrier Frequency Offset Estimator in the Uplink of IFDMA System},
        proceedings={1st International ICST Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2007},
        month={4},
        keywords={},
        doi={10.1109/CHINACOM.2006.344910}
    }
    
  • Yirong Wang
    Wenbo Wang
    Year: 2007
    An Improved Music Algorithm for Carrier Frequency Offset Estimator in the Uplink of IFDMA System
    CHINACOM
    IEEE
    DOI: 10.1109/CHINACOM.2006.344910
Yirong Wang1, Wenbo Wang1
  • 1: Beijing University of Posts and Telecomms., Beijing, 100876

Abstract

The carrier frequency offsets (CFOs) in the uplink of interleaved frequency division multiple access (IFDMA) system destroy the orthogonality between users, resulting in severe multiple access interference (MAI). An improved MUSIC (multiple signal classification) algorithm is proposed to estimate CFO in this paper. In contrast to conventional MUSIC schemes which require multi-dimensional search over the parameter space, a signal structure based deterministic estimation algorithm with MUSIC is proposed for estimating the CFOs of all users simultaneously in the uplink of IFDMA system, using only one IFDMA block. Diversity schemes are also presented to improve the estimation performance. The algorithm is attractive owing to the low computational complexity and exhibiting effectiveness in frequency selective channels. The performance of the proposed scheme is confirmed by computer simulations.