SHERP

Preamble-Assisted Channel Estimation in OFDM-based Wireless Systems

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Authors
Kim, Cheong-Hwan; Ban, Dae-Seung; Lee, Yong-Hwan
Issue Date
2009-01-18
Publisher
Institute of Electrical and Electronics Engineers
Citation
RWS '09. IEEE Radio and Wireless Symposium, pp. 409-412, 2009.
Keywords
preamblechannel estimationOFDM
Abstract
Accurate channel state information (CSI) is
indispensable for the use of channel-adaptive transmission
techniques, but it may not easily be achievable near the cell
boundary in cellular environments. This paper considers the
improvement of CSI estimation accuracy in OFDM-based
wireless packet transmission systems by exploiting the
preamble signal as well as the pilot signal. The CSIs
respectively estimated from the received preamble and pilot
signal are combined according to the channel correlation
between the preamble and the pilot signaling. The combining
weight is analytically determined to minimize the mean
squared error. When multiple antennas are employed for
interference cancellation, the CSI of interference channels
can also be estimated in a similar manner. The proposed
scheme is applied to the mobile-WiMAX system to verify the
effectiveness. Simulation results show that the proposed
scheme is quite effective near the cell boundary.
Language
English
URI
http://www.ist-isis.org/index/other-meetings/ieee-rws-2009.html

http://hdl.handle.net/10371/7535
DOI
https://doi.org/10.1109/RWS.2009.4957369
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Others_전기·정보공학부
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