Communications and Networking. 13th EAI International Conference, ChinaCom 2018, Chengdu, China, October 23-25, 2018, Proceedings

Research Article

A Joint Frequency Offset Estimation Method Based on CP and CRS

  • @INPROCEEDINGS{10.1007/978-3-030-06161-6_46,
        author={Xiaoling Hu and Zhizhong Zhang and Yajing Zhang},
        title={A Joint Frequency Offset Estimation Method Based on CP and CRS},
        proceedings={Communications and Networking. 13th EAI International Conference, ChinaCom 2018, Chengdu, China, October 23-25, 2018, Proceedings},
        proceedings_a={CHINACOM},
        year={2019},
        month={1},
        keywords={CP CRS Combination FFO},
        doi={10.1007/978-3-030-06161-6_46}
    }
    
  • Xiaoling Hu
    Zhizhong Zhang
    Yajing Zhang
    Year: 2019
    A Joint Frequency Offset Estimation Method Based on CP and CRS
    CHINACOM
    Springer
    DOI: 10.1007/978-3-030-06161-6_46
Xiaoling Hu1,*, Zhizhong Zhang1, Yajing Zhang1
  • 1: Chongqing University of Posts and Telecommunications
*Contact email: hu-xiaoling@foxmail.com

Abstract

In order to solve the problem that Fraction Frequency Offset (FFO) estimation algorithm has the problem of low estimation precision, small range and high occupancy rate of spectrum resource, this paper proposed a FFO estimation method based on the combination of Cyclic Prefix (CP) and Cell-specific reference signals (CRS). First, judging the range of the true frequency offset value according to the results of the frequency offset estimation algorithm based on CP. Then the possible true frequency offset value obtained by adding value calculated by frequency offset estimation algorithm based on CRS and the possible rotation value of 2000 nHz. Finally, comparison the results of the frequency offset estimation algorithm based on CP and the possible true frequency offset, the minimum deviation is its true. The accuracy is the same as that frequency offset estimation algorithm that based on CRS. The range is the same as frequency offset estimation algorithm based on CP, which is . The principle of the algorithm is simple and does not occupy additional bandwidth resources.