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Opis

This book tackles the issue of the rapid acquisition of spreading codes in Direct-Sequence/Spread-Spectrum systems. In particular, a new algorithm is proposed that exploits the experience of the iterative decoding of modern codes to detect these sequences. This new method is a Message-Passing-based algorithm. Specifically, instead of correlating the received signal with local replicas of the transmitted Linear-Feedback-Shift-Register sequence, an iterative Message-Passing (MP) algorithm is implemented to be run on a loopy graph. Thus, this work is an analysis of the detection technique based on MP algorithms to acquire m-Sequences and Gold codes. In detail, an unified treatment to design and implement a specific set of graphical models for these codes is reported. A theoretical study on the acquisition time performance and the comparison to the standard algorithms is done. A preliminary architectural design is also provided. Finally, the analysis is also enriched by comparing this new technique to the standard algorithms in terms of computational complexity and (missed/wrong/correct) acquisition probabilities as derived by simulations.

Szczegóły książki

Kategoria Książki po angielsku Technology, engineering, agriculture Electronics & communications engineering Electronics engineering

• Pełny tytuł: Rapid Acquisition in Direct-Sequence/Spread-Spectrum Systems
• Podtytuł: Iterative Message-Passing-Based Algorithms to Fast Acquire Spreading Sequences
• Autor: Fabio Principe
• Język: Angielski
• Oprawa: Miękka
• Liczba stron: 164
• EAN: 9783639191936
• ISBN: 3639191935
• ID: 06827297
• Wydawca: VDM Verlag
• Waga: 249 g
• Wymiary: 229 × 152 × 10 mm
• Data wydania: 26. August 2009

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