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Browsing by Author "Ali, Wisam Hasan"

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    Master Thesis
    Efficient phase rotation techniques in PAPR reduction of OFDM symbols
    (Çankaya Üniversitesi, 2017) Ali, Wisam Hasan; 01. Çankaya Üniversitesi
    Orthogonal frequency division multiplexing (OFDM) is an efficient digital multi-carrier wireless communication method that offers high-speed data rate, high spectral capability, and robustness to multipath fading. In spite of their enormous features, OFDM systems have high peak to average power ratios (PAPRs) which create serious problems for their use in practical communication systems. In this thesis we inspect multiple signaling PAPR reduction methods for OFDM communication systems. Multiple signaling PAPR reduction techniques include the partial transmit sequence (PTS), the tone injection (TI) and the tone reservation (TR) which has two implementation algorithms; the clipping based (TR-C) and the Kernel-based (TR-K) methods. We also tried a new PAPR reduction approach. The new method is based on the rotation of the information symbols before inverse fast Fourier transform (IFFT) processing. Via computer simulations, we compared the performances of classical multiple signaling and new optimum phase rotation tone PAPR reduction methods to each other.