NDLI: A Channel Estimation Method Based on Sample-Shift of Time-Domain Signal for OFDM Systems

Content Provider	IEEE Xplore Digital Library
Author	Mingqi Li Lin Tang Xiaodong Zhang Honglin Hu Haifeng Wang
Copyright Year	2007
Description	Author affiliation: Shanghai Res. Center for Wireless Commun. (Mingqi Li; Lin Tang; Xiaodong Zhang; Honglin Hu)
Abstract	A channel estimation method based on sample-shift of time-domain signal is proposed for OFDM systems. Through artificial cyclic sample-shift of time-domain signal, the equivalent coherent bandwidth of OFDM systems can be broadened. Hence, the channel estimation errors, caused by the simple linear interpolation in frequency-domain, can be reduced due to the increase of correlation between neighboring pilot sub-carriers. The theoretical analysis and simulation results show that equivalent channel coherent bandwidth can be broadened effectively and the channel estimation performance can be improved by sample-shift significantly, especially over high SNR range. When the value of cyclic sample-shift is given as the sampling-interval normalized RMS of channel, the near optimal performance can be achieved.
Starting Page	1430
Ending Page	1434
File Size	268756
Page Count	5
File Format	PDF
ISBN	1424402662
ISSN	15502252
DOI	10.1109/VETECS.2007.299
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-04-22
Publisher Place	Ireland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Channel estimation Time domain analysis OFDM Interpolation Bandwidth Frequency domain analysis Discrete Fourier transforms Lagrangian functions Discrete cosine transforms Frequency estimation
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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