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There has been greatly increasing interest in Orthogonal Frequency Division Multiplexing (OFDM) for broadband wireless transmission due to its robustness against multipath fading. However, OFDM signals have high Peak-to Average Power Ratio (PAPR), and thus, a power amplifier must be operated with a large Input power BackOff (IBO). Recently, OFDM combined with Time Division Multiplexing (OFDM/TDM) using Minimum Mean Square Error Frequency Domain Equalization (MMSE-FDE) has been presented to reduce the PAPR, while improving the Bit Error Rate (BER) performance of conventional OFDM. In this paper, by extensive computer simulation, the authors present a comprehensive performance comparison of OFDM-based schemes in a nonlinear and frequency selective fading channel.
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