Effects of Different modulation schemes in PAPR reduction of SC-FDMA System for Uplink Communication
|Prittu Ann Thomas1, Prof M.Mathurakani2
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This paper presents the work done on different modulation schemes for Single carrier frequency division multiple access (SC-FDMA).SC-FDMA has turned out to be a suitable solution for high data rate uplink communication systems. It has become the choice for uplink transmission in Long Term Evolution (LTE).OFDM was an excellent choice for a multipath fading channel. But it suffers from the major limitation of Peak to average power ratio problem. PAPR is highly detrimental to battery powered devices like mobile phones. SC-FDMA can overcome the PAPR limitation of OFDMA signals. In this paper we are finding out the best modulation scheme for PAPR reduction in SC-FDMA. Here we are using QPSK, QAM and CPM modulations for studying PAPR reduction. SC-FDMA uses 2 schemes for sub-carrier mapping. They are Interleaved (IFDMA) and localized (LFDMA) mapping. In this paper we are comparing PAPR of IFDMA, LFDMA and OFDMA. Similarly BER performance of the system will also be studied. The effect of pulse shaping on the signal will also be analyzed in the paper.