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FFT-based Channel Estimation Scheme in LTE-A Downlink System
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 Title & Authors
FFT-based Channel Estimation Scheme in LTE-A Downlink System
Moon, Sangmi; Chu, Myeonghun; Kim, Hanjong; Kim, Daejin; Hwang, Intae;
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In this paper, we propose the channel estimation scheme for 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 least square (LS) or minimum mean square error (MMSE) channel estimation scheme to time domain channel impulse response by taking the inverse FFT (IFFT). After windowing the channel response in the time domain, we can obtain the channel frequency response by taking the FFT. We perform the system level simulation based on 20MHz bandwidth of 3GPP LTE-A downlink system. Simulation results show that the proposed channel estimation scheme can improve signal-to-noise-plus-interference ratio (SINR), throughput, and spectral efficiency of conventional system.
Channel Estimation;Downlink System;FFT Interpolation;LTE-A;System Level Simulation;
 Cited by
3GPP, TS 36.211, "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation," V11.4.0, Sept. 2013.

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3GPP TR 36.814, Further advancements for E-UTRA physical layer aspects (Release 9), V9.0.0 (2010-03)