985 resultados para Differential Pulse Code Modulation


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Magdeburg, Univ., Fak. für Naturwiss., Diss., 2011

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Magdeburg, Univ., Fak. für Wirtschaftswiss., Diss., 2012

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Magdeburg, Univ., Fak. für Naturwiss., Diss., 2012

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Magdeburg, Univ., Fak. für Naturwiss., Diss., 2013

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Magdeburg, Univ., Fak. für Informatik, Diss., 2013

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In this paper the construction of Reed-Solomon RS(255,239) codeword is described and the process of coding and decoding a message is simulated and verified. RS(255,239), or its shortened version RS(224,208) is used as a coding technique in Low-Power Single Carrier (LPSC) physical layer, as described in IEEE 802.11ad standard. The encoder takes 239 8-bit information symbols, adds 16 parity symbols and constructs 255-byte codeword to be transmitted through wireless communication channel. RS(255,239) codeword is defined over Galois Field GF and is used for correcting upto 8 symbol errors. RS(255,239) code construction is fully implemented and Simulink test project is constructed for testing and analyzing purposes.

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v.9:no.1(1930)

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Magdeburg, Univ., Fak. für Naturwiss., Diss., 2014

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Magdeburg, Univ., Fak. für Naturwiss., Diss., 2015

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Magdeburg, Univ., Med. Fak., Habil.-Schr., 2014

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This study investigates the Drosophilidae species associated to fruiting bodies of fungi in forested and anthropized environments of the Atlantic Rain Forest Biome, in south and southeastern Brazil. We collected samples of imagoes flying over and emerging from fruiting bodies of species of five fungi families, in six collection sites. We obtained 18 samples, from which emerged 910 drosophilids of 31 species from the genera Drosophila Fallen, 1823, Hirtodrosophila Duda, 1923, Leucophenga Mik, 1886, Mycodrosophila Oldenberg, 1914, Scaptomyza Hardy, 1849, Zaprionus Coquillett, 1901 and Zygothrica Wiedemann, 1830. The Drosophila species collected on fungi, as well as Zaprionus indianus Gupta, 1970, had previously been recorded colonizing fruits, demonstrating their versatility in resource use. Most of these species belong to the immigrans-tripunctata radiation of Drosophila. Our records expands the mycophagous habit (feeding or breeding on fungi) to almost all species groups of this radiation in the Neotropical region, even those supposed to be exclusively frugivorous. Assemblages associated to fungi of forested areas were more heterogeneous in terms of species composition, while those associated to fungi of anthropized areas were more homogeneous. The drosophilids from anthropized areas were also more versatile in resource use.

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Some existence results are obtained for periodic solutions of nonautonomous second-order differential inclusions systems with p-Laplacian