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In this paper, we propose an adaptive transmission technique for MIMO-OFDM systems which selects one of space-time block coded OFDM (STBC-OFDM) and space-frequency block coded OFDM (SFBC-OFDM). STBC-OFDM and SFBC-OFDM undergo severe performance degradation in time-varying and frequency-selective channel, respectively. In the adaptive scheme, either STBC-OFDM or SFBC-OFDM is selected by using the proposed...
Space-time block coded orthogonal frequency division multiplexing (STBC-OFDM) from coordinate interleaved orthogonal design (CIOD) is considered to be an effective space- time code (STC) to achieve full-rate and full-diversity with a simple maximum-likelihood (SML) decoder. However, the SML decoder cannot prevent the performance degradation completely due to time-varying effects such as co-channel...
Space-time block code from coordinate interleaved orthogonal design (STBC-CIOD) is considered as an effective transmit diversity scheme for achieving full-rate and full-diversity with low decoding complexity. The simple maximum likelihood (SML) decoder for STBC-CIOD is known to be an optimal decoder in time-invariant channel. However, the performance of the SML decoder is inevitably degraded when...
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