OFDM for Wireless Multimedia Communications
OFDM for Wireless Multimedia Communications
An overview of peak-to-average power ratio reduction techniques for multicarrier transmission
IEEE Wireless Communications
SLM and PTS peak-power reduction of OFDM signals without side information
IEEE Transactions on Wireless Communications
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Orthogonal frequency division multiplexing (OFDM) modulation using orthogonal subcarriers reduces the delay spread by increasing robustness to multipath fading and can use overlapped bandwidth due to orthogonality on frequency domain. Thus, OFDM has been adopted for high speed data transmission of multimedia traffic. However, OFDM also has a drawback of a high peak-to average-power-ratio (PAPR). This high PAPR takes place due to parallel processing of a number of data at once using a fast Fourier transform (FFT) processor. Due to this high PAPR amplifier usually does not act in dynamic range. In this paper, we propose an algorithm that can reduce PAPR using selective mapping (SLM) in impulsive noise channel. In order to utilize SLM technique, side information needs to be transmitted for demodulation while degrading transmission efficiency. We propose and analyze scaled SLM technique which removes necessity of the side information.