NDLI: Optimal pilot design for MIMO-OFDM system channel estimation in time domain

Content Provider	IEEE Xplore Digital Library
Author	Han Wang JinKuan Wang
Copyright Year	2007
Description	Author affiliation: Northeastern Univ., Shenyang (Han Wang; JinKuan Wang)
Abstract	In this paper, we propose a least squares (LS) channel estimation scheme in time domain for MIMO-OFDM systems based on pilot tones. The basic idea is that time-domain signals generated by pilots of transmitter and receiver are used to estimate the time-domain channel responses. Optimal pilot sequences (OPS) with regard to (w.r.t) the mean square error (MSE) of LS channel estimation are also presented; It is shown that the OPS are equipowered, equispaced, and position orthogonal. The maximum guard bandwidth (MGB) w.r.t MSE is introduced, as virtual subcarriers are not used for transmission. If the guard bandwidth of MIMO-OFDM system is less than or equal to the MGB, the OPS can be avoided from the guard band by adjusting initial position of OPS. Through simulations, it is shown that the OPS derived in this paper outperform conventional OPS in terms of MGB and MSE.
Starting Page	307
Ending Page	312
File Size	463088
Page Count	6
File Format	PDF
ISBN	9781424410736
DOI	10.1109/IWSDA.2007.4408386
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-23
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Subcarriers Guard band OFDM Time domain analysis LS channel estimation Least squares approximation Design engineering Transmitters Maximum guard band(MGB) Channel estimation Receiving antennas Bandwidth Mean square error methods MIMO Optimal pilot sequences(OPS)
Content Type	Text
Resource Type	Article

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