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2008

Four Transmit Diversity Schemes for Coded OFDM Systems with Four Transmit Antennas

8 years 4 months ago
Four Transmit Diversity Schemes for Coded OFDM Systems with Four Transmit Antennas
We compare four open-loop transmit diversity schemes in a coded Orthogonal Frequency Division Multiplexing (OFDM) system with four transmit antennas, namely cyclic shift diversity (CSD), Space-Time Block Code (STBC, Alamouti code is used) with CSD, Quasi-Orthogonal STBC (QO-STBC) and Minimum-Decoding-Complexity QOSTBC (MDC-QOSTBC). We show that in a coded system with low code rate, a scheme with spatial transmit diversity of second order can achieve similar performance to that with spatial transmit diversity of fourth order due to the additional diversity provided by the phase shift diversity with channel coding. In addition, we also compare the decoding complexity and other features of the above four mentioned schemes, such as the requirement for the training signals, hybrid automatic retransmission request (HARQ), etc. The discussions in this paper can be readily applied to many modern wireless communication systems, such as mobile systems beyond 3G, IEEE 802.11 wireless LAN, or IEEE...
Chau Yuen, Yan Wu, Sumei Sun
Added 13 Dec 2010
Updated 13 Dec 2010
Type Journal
Year 2008
Where JCM
Authors Chau Yuen, Yan Wu, Sumei Sun
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