A delayed space-frequency cyclic group code is proposed in this paper, which applies a new bandwidth and power-efficient space-frequency processing on the orthogonal-frequency-division-multiplexing (OFDM) system. The delayed orthogonality with respect to frequency tones among different transmitter antennas guarantees to exploit the full spatial and frequency diversity of the frequency-selective multi-input multi-output (MIMO) channel. In contrast with the schemes which combine the single-antenna error correcting code with delayed transmitter diversity in multi-antenna OFDM systems, this space-frequency code has a robust performance in flat-fading channel.
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