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Home / Archives / Volume-4 / Issue-3 / Article-8

Volume - 4 | Issue - 3 | september 2022

PAPR Reduction of OFDM with DFT Spreading Method
Chandanala Sravanya  , Pasupuleti Sairam, Barupatla Srinika
Pages: 201-214
Cite this article
Sravanya, C., Sairam, P. & Srinika, B. (2022). PAPR Reduction of OFDM with DFT Spreading Method. Journal of Trends in Computer Science and Smart Technology, 4(3), 201-214. doi:10.36548/jtcsst.2022.3.008
Published
10 October, 2022
Abstract

Future communication systems will demand the transmission of huge amounts of data, therefore will require a highly linear power amplifier. The Orthogonal Frequency Division Multiplexing (OFDM) technique is widely used in multimedia services for providing high data rates and providing high Quality of Service. The transmitter power amplifier's range of operation in a communication system is linear. Signal distortion happens when the input signal's amplitude exceeds the linear range of the transmitter power amplifier. Therefore, the transmitter's input signal has to have a low peak to average power ratio (PAPR). The OFDM system has been recognized as the high rate wireless radio channel transmission. Therefore, it will also be highly beneficial for the high-speed communication system. However, due to the extremely high PAPR issue, using the OFDM system in a communication system is not simple. It results in extremely low power efficiency. Therefore, it is crucial to lower the PAPR in the OFDM system in order to employ it in the communication system. By using a discrete Fourier matrix, the Discrete Fourier Transform spreading strategy may significantly lower the PAPR of an OFDM signal. This paper describes the PAPR reduction approach in OFDM signals and examines the effectiveness of OFDM.

Keywords

DFT Spread OFDM PAPR PSD BER SNR cyclic prefix (CP)

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