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PAPR Reduction in OFDM Using DCT Precoded SLM Technique

Ram Pratap Singh, Ankit Kumar

Abstract


Orthogonal frequency division multiplexing (OFDM) is a particular form of multi-carrier modulation. OFDM is a combination of modulation and multiplexing which is robust against the multipath effect, intersymbol interference and high spectral efficiency. However, peak-to-average power ratio (PAPR) is a major drawback in the system since this leads to the distortion problem in the linear devices such as the power amplifier (PA). Thus, the PAs require a back-off which is almost equal to the PAPR for distortion-less transmission. Due to this, amplifier efficiency decreases. Hence, the main focus of this paper is to reduce the PAPR. One of the available PAPR solutions is selective mapping technique (SLM). In this technique, the efficiency does not depend on the number of carriers. This paper investigates the effectiveness of the SLM technique by focusing on the performance of PAPR with the DCT precoded SLM technique.

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References


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DOI: https://doi.org/10.37628/jdcas.v4i1.759

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