NDLI: A New Iterative Doppler-Assisted Channel Estimation Joint With Parallel ICI Cancellation for High-Mobility MIMO-OFDM Systems

Content Provider	IEEE Xplore Digital Library
Author	Aboutorab, N. Hardjawana, W. Vucetic, B.
Copyright Year	1967
Abstract	In this paper, we propose an iterative channel estimation and intercarrier interference (ICI) cancellation method for highly mobile users in long-term evolution (LTE) systems. The proposed scheme estimates the wireless channel by using pilot symbols, estimates of the data symbols, and Doppler spread information at the receiver. The wireless channel is expressed by weighted time-domain channel interpolation, where the interpolation weights are designed based on the Doppler spread and time-domain channel correlations. The channel estimates are obtained by employing a least-square (LS) method. A simplified parallel interference cancellation (PIC) scheme coupled with decision statistical combining (DSC) is used to cancel the ICI and to improve data symbol detection. These data symbols are then utilized to further refine the channel estimation iteratively. The simulation results show that the performance degradation of the proposed iterative channel estimation and ICI cancellation scheme in a high-mobility environment (e.g., normalized Doppler spread of 0.1), compared with the performance of a system when users are static and perfect channel state information (CSI) is available at the receiver, is minimal.
Sponsorship	IEEE Vehicular Technology Society
Starting Page	1577
Ending Page	1589
Page Count	13
File Size	1787764
File Format	PDF
ISSN	00189545
Volume Number	61
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-05-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Channel estimation Time domain analysis OFDM Interpolation Doppler effect Receivers Correlation parallel interference cancellation (PIC) decision statistical combining (DSC) Doppler spread high mobility intercarrier interference (ICI) cancellation iterative receiver multiple-input–multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM)
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Automotive Engineering Computer Networks and Communications Electrical and Electronic Engineering Aerospace Engineering

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