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| Titre : | Study and performance analysis of OFDM system by sequence-based PAPR reduction | | Type de document : | theses et memoires | | Auteurs : | Zineddine Hameg, Auteur ; Abderaouf Merabtene, Auteur ; Nadhir Djeffal, Directeur de thèse | | Editeur : | Tizi-Ouzou : UMMTO F.G.E.I | | Année de publication : | 2024 | | Importance : | 71 p. | | Présentation : | ill. | | Format : | PDF | | Note générale : | Bibliogr. | | Langues : | Anglais | | Mots-clés : | OFDM Peak-to-Average Power Ratio Zadoff-Chu sequences Precoding Postcoding Wireless communication BER ZCT. | | Résumé : | Orthogonal Frequency Division Multiplexing (OFDM) is a cornerstone modulation technique in modern wireless communication systems due to its high spectral efficiency and robustness to multipath fading. However, its main drawback, high Peak-to-Average Power Ratio (PAPR), limits power amplifier efficiency and compromises signal integrity. Addressing this issue is critical for improving energy performance in power-constrained environments such as mobile and satellite communication systems. This thesis investigates a low-complexity, sequence-based solution to mitigate the PAPR problem in OFDM.
The core objective is to enhance OFDM performance by integrating Zadoff-Chu (ZC) sequences through matrix-based precoding and postcoding techniques. The approach is evaluated through comprehensive MATLAB simulations across different modulation orders. Results show that Zadoff-Chu Transform (ZCT) matrices significantly reduce PAPR, up to 2.8 dB for low-order modulations, without affecting Bit Error Rate (BER) or spectral integrity. These findings demonstrate the practical feasibility of sequence-enhanced OFDM systems and suggest promising directions for future waveform design. The study contributes to the development of energy-efficient wireless communication, laying the groundwork for further innovations in signal processing and system optimization. | | Diplôme : | Master | | Permalink : | ./index.php?lvl=notice_display&id=38088 |
Study and performance analysis of OFDM system by sequence-based PAPR reduction [theses et memoires] / Zineddine Hameg, Auteur ; Abderaouf Merabtene, Auteur ; Nadhir Djeffal, Directeur de thèse . - Tizi-Ouzou (Tizi-Ouzou) : UMMTO F.G.E.I, 2024 . - 71 p. : ill. ; PDF. Bibliogr. Langues : Anglais | Mots-clés : | OFDM Peak-to-Average Power Ratio Zadoff-Chu sequences Precoding Postcoding Wireless communication BER ZCT. | | Résumé : | Orthogonal Frequency Division Multiplexing (OFDM) is a cornerstone modulation technique in modern wireless communication systems due to its high spectral efficiency and robustness to multipath fading. However, its main drawback, high Peak-to-Average Power Ratio (PAPR), limits power amplifier efficiency and compromises signal integrity. Addressing this issue is critical for improving energy performance in power-constrained environments such as mobile and satellite communication systems. This thesis investigates a low-complexity, sequence-based solution to mitigate the PAPR problem in OFDM.
The core objective is to enhance OFDM performance by integrating Zadoff-Chu (ZC) sequences through matrix-based precoding and postcoding techniques. The approach is evaluated through comprehensive MATLAB simulations across different modulation orders. Results show that Zadoff-Chu Transform (ZCT) matrices significantly reduce PAPR, up to 2.8 dB for low-order modulations, without affecting Bit Error Rate (BER) or spectral integrity. These findings demonstrate the practical feasibility of sequence-enhanced OFDM systems and suggest promising directions for future waveform design. The study contributes to the development of energy-efficient wireless communication, laying the groundwork for further innovations in signal processing and system optimization. | | Diplôme : | Master | | Permalink : | ./index.php?lvl=notice_display&id=38088 |
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