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Orthogonal Frequency Division Multiplexing (OFDM) signals have a problem with high Peak-to-Average Power Ratio (PAPR). A distortion-less SeLective Mapping (SLM) has been proposed to reduce the PAPR, but a high computational complexity prohibits its application to OFDM with a large number of subcarriers. Recently, OFDM combined with Time Division Multiplexing (OFDM/TDM) using Minimum Mean Square Error Frequency-Domain Equalization (MMSE-FDE) was proposed to improve the transmission performance of conventional OFDM in terms of the Bit Error Rate (BER) and the PAPR. The PAPR problem, however, cannot be completely eliminated.
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