Abstract
Future broadband wireless systems will provide extreme high data rate and better performance over time-selective and frequency-selective channel. To support this high speed data transmission and high performance, two powerful technologies, namely, multiple-input multiple-output (MIMO) antennas and orthogonal frequency division multiplexing (OFDM) modulation are combined together. The first one which is MIMO technology provides transmission of different information simultaneously over wireless channel through multiple antennas, thereby boosting the system throughput. The second one that is OFDM system divides the transmitted information bits into many different sub-blocks and sends them over a large number of closely spaced different sub-channels. Therefore, MIMO-OFDM has the potential to achieve more reliable performance at higher data rate since MIMO can boost the capacity and the diversity and OFDM can mitigate the detrimental effects due to multipath fading. In this chapter, an overview of space-time (ST), space frequency (SF), and space-time-frequency (STF) as well as a systematic design of high rate full diversity SF and STF coding for multiuser MIMO-OFDM is reported full diversity of SF code design criteria is derived.
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