Indian Journal of Science and Technology
Year: 2016, Volume: 9, Issue: Special Issue 1, Pages: 1-5
K. Shri Ramtej* and S. Anuradha
Department of Electronics and Communication Engineering, National Institute of Technology, Warangal - 506004, Telangana, India; [email protected]
*Author for correspondence
Department of Electronics and Communication Engineering
Objectives: This paper proposes logarithmic companding technique to improve PAPR and BER performance of conventional Single Carrier Frequency Division Multiple Access (SC-FDMA) system. Methods/Analysis: The lower signal envelope fluctuations in SC-FDMA signal results in low peak to average power ratio, in contrast to that of OFDMA. But still, there is a need to minimize PAPR in SC-FDMA systems. Although there are many techniques to minimize PAPR in SC-FDMA systems they are highly complex or need side information to be transmitted. This paper proposes a companding technique based on a logarithmic function which provides better PAPR reduction when compared to µ law companding. Findings: Simulation results demonstrate that proposed method provides better PAPR and BER performance when compared to conventional SC- FDMA system and µ law companding.
Keywords: Companding, LTE, PAPR Reduction, SC-FDMA
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