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

Title
FFT-Based Channel Estimation Scheme in LTE-A Downlink System
Authors
Moon S.Choe H.Chu M.You C.Liu H.Kim J.-H.Kim J.Kim D.J.Hwang I.
Ewha Authors
김정호
SCOPUS Author ID
김정호scopus
Issue Date
2017
Journal Title
Wireless Personal Communications
ISSN
0929-6212JCR Link
Citation
vol. 96, no. 4, pp. 5911 - 5929
Keywords
Channel estimationDownlink systemFFT interpolationLTE-ASystem level simulation
Publisher
Springer New York LLC
Indexed
SCIE; SCOPUS WOS scopus
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. © 2017, Springer Science+Business Media New York.
DOI
10.1007/s11277-017-4454-2
Appears in Collections:
엘텍공과대학 > 전자공학과 > Journal papers
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