Rate-Compatible SFBC-OFDM under Rapidly Time-Varying Channels

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An inter-carrier interference (ICI) occurs in an orthogonal frequency division multiplexing (OFDM) system when a channel is rapidly time-varying. The proposed scheme employs a polynomial cancellation code (PCC) to suppress this ICI, and uses a linear complex field (LCF) code as a transmit-diversity technique to make the transmission rate compatible up n(T) / (n(T) + 1), where n(T) is the number of transmit antennas used. The conventional orthogonal code (OC), such as the Alamouti code, with accompanying PCC cannot achieve this rate. Both analysis and simulation results verify that the proposed scheme can achieve higher channel capacity as well as lower bit error rate (BER) than the other schemes in rapidly time-varying channels, even with a linear receiver and inaccurate channel estimation.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2011-08
Language
English
Article Type
Article
Keywords

MIMO-OFDM; INTERCARRIER INTERFERENCE; SYSTEMS; DESIGN; CODES

Citation

IEEE TRANSACTIONS ON COMMUNICATIONS, v.59, no.8, pp.2070 - 2077

ISSN
0090-6778
URI
http://hdl.handle.net/10203/99948
Appears in Collection
EE-Journal Papers(저널논문)
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