Wireless systems often implement one or more types of diversity in order to achieve reliable communication. Different types of diversity techniques such as temporal, frequency, code, and spatial have been developed in the literature. In addition to the destructive multipath nature of wireless channels, frequency selective channels pose InterSymbol Interference (ISI) while offering frequency diversity for successfully designed systems. Orthogonal Frequency Division Multiplexing (OFDM) has been shown to combat ISI extremely well by converting the frequency selective channel into parallel flat fading channels. On the other hand, Bit Interleaved Coded Modulation (BICM) was shown to have high performance for flat fading Rayleigh channels. Combination of BICM and OFDM was shown to exploit the diversity that is inherited within the frequency selective fading channels.
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