Performance of scaled SLM for PAPR reduction of OFDM signal in PLC channels

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 m...

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Bibliographic Details
Published in2009 IEEE International Symposium on Power Line Communications and Its Applications pp. 166 - 170
Main Authors Jae Sun Lee, Hui-Myoung Oh, Ji-Tae Kim, Jin Young Kim
Format Conference Proceeding
LanguageEnglish
Japanese
Published IEEE 01.03.2009
Subjects
Bandwidth
Data communication
Delay
Fading
Frequency domain analysis
Multimedia systems
OFDM
OFDM modulation
PAPR
Peak to average power ratio
PLC
Programmable control
Robustness
SLM
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Summary: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 such as HomePlug A/V and Mobile WiMax. However, OFDM also has a drawback of a high PAPR (peak-to-average-power-ratio). 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 power line communication (PLC) 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.
ISBN:1424437903
9781424437900
DOI:10.1109/ISPLC.2009.4913423