Abstract
Orthogonal Frequency-Division Multiple Access (OFDMA) and Single Carrier Frequency-Division Multiple Access (SC-FDMA) schemes are major part of Long Term Evolution (LTE). OFDM is more widely used technique due to its robustness against frequency selective fading channels. However, it suffers from a high Peak-to-Average Power Ratio (PAPR). In this paper, Discrete Fourier Transform (DFT) spreading technique has been proposed to improve the performance of OFDMA system by reduction of PAPR. OFDMA and SC-FDMA system has been investigated using different modulation schemes on the basis of PAPR and Bit Error Rate (BER). The results of proposed system show satisfactory improvement in system performance over OFDMA.
Published Version
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