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Orthogonal Frequency Division Multiplexing (OFDM) has been widely adopted in many applications and standards for a number of benefits including high efficiency and immunity against the frequency-selective channel. Power loading, which is a technique that allocates different amount of power for each subcarrier, further enhances the system performance by maximizing mutual information, reducing Bit Error...
Optimizing the indices and values of free subcarriers (FSs) can significantly reduce the peak-to-average power ratio (PAR) of orthogonal frequency division multiplexing (OFDM) signals. In this paper, a numerical method is proposed to analyze the average PAR reduction performance of the FS optimization method. Different PAR reduction performance is revealed for different FS index assignments and the...
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