NDLI: A DFT-based channel estimation scheme for IEEE 802.16e OFDMA systems

Content Provider	IEEE Xplore Digital Library
Author	Szu-Lin Su Yung-Chuan Lin Chieh-Chih Hsu Chuang, G.C.H.
Copyright Year	2010
Description	Author affiliation: SoC Technology Center, Industrial Technology Research Institute, Hsinchu, 310, Taiwan (Yung-Chuan Lin; Chuang, G.C.H.) \|\| Institute of Computer and Communication Engineering, Department of Electrical Engineering, National Cheng Kung University, Tainan City, Taiwan, R.O.C (Szu-Lin Su; Chieh-Chih Hsu)
Abstract	Recent years, Orthogonal Frequency Division Multiplexing (OFDM) has been widely applied to various digital communication systems. WiMAX (Worldwide Interoperability for Microwave Access) holds a combination of fixed and mobile broadband wireless access techniques. IEEE 802.16e is the specification designed for WiMAX system in application of mobile environments. In order to achieve robust performance, one of the most important steps is the channel estimation procedure based on limited number of pilot signals. Owing to the channel's time variant characteristic caused by user's mobility and irregular arrangement of pilot signals in 802.16e system, the exact channel estimation is more difficult to achieve for this system. In this paper, under the consideration of the effects of mobility and AWGN, we propose a DFT-Based OFDM channel estimation scheme for the WiMAX systems. Simulation results show that the proposed adaptive channel estimation scheme can keep good system performance.
Starting Page	775
Ending Page	779
File Size	5380856
Page Count	5
File Format	PDF
ISBN	9781424454273
ISSN	17389445
e-ISBN	9781424454280
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-02-07
Publisher Place	Korea (South)
Access Restriction	Subscribed
Rights Holder	Electronics and Telecommunications Research Institute
Subject Keyword	Channel estimation OFDM WiMAX Frequency estimation Robustness Digital communication AWGN Discrete Fourier transforms Frequency response Additive white noise virtual channel frequency response Worldwide Interoperability for Microwave Access (WiMAX) channel estimation DFT
Content Type	Text
Resource Type	Article

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