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FFT-Based Channel Estimation Scheme in LTE-A Downlink System

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Abstract

In this paper, we propose a channel estimation scheme for a long term evolution-advanced (LTE-A) downlink system. The proposed scheme uses the fast Fourier transform (FFT) interpolation scheme for the user moving at a high speed. The FFT interpolation scheme converts the channel frequency response obtained from the least square or minimum mean square error channel estimation scheme to a time-domain channel impulse response by using the inverse FFT (IFFT). After windowing the channel response in the time domain, the channel frequency response can be obtained using the FFT. We performed a system-level simulation based on the 20 MHz bandwidth of the 3rd Generation Partnership Project LTE-A downlink system. Simulation results show that the proposed channel estimation scheme can improve the signal-to-noise-plus-interference ratio, as well as the throughput and spectral efficiency, of a conventional system.

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Acknowledgements

This work was supported by the ICT R&D program of MSIP/IITP. [14-000-04-001, Development of 5G Mobile Communication Technologies for Hyper-connected Smart Services]. This work was supported by the Human Resource Training Program for Regional Innovation and Creativity through the Ministry of Education and National Research Foundation of Korea (NRF-2014H1C1A1066568).

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Authors and Affiliations

  1. Dept. of Electronics and Computer Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju, 500-757, Republic of Korea

    Sangmi Moon, Hun Choe, Myeonghun Chu, Dae Jin Kim & Intae Hwang

  2. Dept. of Information and Communications Engineering, Myongji University, San 38-2 Namdong, Cheoingu, Yongin, Gyeonggi-Do, 449-728, Republic of Korea

    Cheolwoo You

  3. School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR, 97331-3211, USA

    Huaping Liu

  4. Dept.of Electronics Engineering, Ewha Womans University, 11-1 Daehyundong, Seodaemungu, Seoul, 120-750, Republic of Korea

    Jeong-Ho Kim

  5. Communications and Internet Research Laboratory, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon, 305-700, Republic of Korea

    Jihyung Kim

Authors
  1. Sangmi Moon
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  2. Hun Choe
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  3. Myeonghun Chu
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  4. Cheolwoo You
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  5. Huaping Liu
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  6. Jeong-Ho Kim
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  7. Jihyung Kim
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  8. Dae Jin Kim
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  9. Intae Hwang
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Correspondence to Intae Hwang.

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Moon, S., Choe, H., Chu, M. et al. FFT-Based Channel Estimation Scheme in LTE-A Downlink System. Wireless Pers Commun 96, 5911–5929 (2017). https://doi.org/10.1007/s11277-017-4454-2

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  • DOI: https://doi.org/10.1007/s11277-017-4454-2

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