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Etude et conception d'architectures haut-débit pour la modulation et la démodulation numériques

Abstract : The aim of his thesis is to adapt the modulation and demodulation techniques used in modern data transmission protocols so that they could be used in a purely digital environment. The main issues are important modifications that must be incorporated to the design methodology and the methods of implementing algorithms in hardware. This is because the analogue to digital conversion usually imposes several constraints that worsen performance of the resulting system. In this work are proposed new algorithms that allow to avoid using feedback loops that usually appear in purely analogue architectures, and which are not suitable for digital implementations. The detailed architectures for a phase and amplitude modulator and for the corresponding demodulator are presented and implemented on FPGA. These new digital circuits significantly outperform their existing digital counterparts which could be obtained by simple analogue to digital conversion. They also show good scalability. In particular, the parallel structure of these architectures enables to achieve high-throughput, whereas their modular design allows to reuse some blocks directly in a complete network processor
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Gérald Arnould. Etude et conception d'architectures haut-débit pour la modulation et la démodulation numériques. Autre. Université Paul Verlaine - Metz, 2006. Français. ⟨NNT : 2006METZ032S⟩. ⟨tel-01752369⟩



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