Browsing by Subject "Wireless devices"

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    Ultra-wideband range estimation: Theoretical limits and practical algorithms
    (IEEE, 2008-09) Güvenç, İ.; Gezici, Sinan; Şahinoğlu, Z.
    The high time resolution of ultra-wideband (UWB) signals enables wireless devices to perform accurate range estimation. In order to realize UWB systems with accurate ranging capabilities, both theoretical limits on range estimation and practical algorithms that approach those limits should be investigated. This paper provides a survey of various UWB ranging algorithms and discusses their performance and complexity tradeoffs. In addition, theoretical limits on range estimation are discussed in terms of Cramer-Rao and Ziv-Zakai lower bounds. Index Terms- Ultra-wideband (UWB), time-of-arrival (TOA) estimation, ranging, Cramer-Rao lower bound (CRLB), Ziv-Zakai lower bound (ZZLB). ©2008 IEEE.
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    Wireless ATA: A new data
    (2005) Özler, Serdar; Körpeoğlu, İbrahim
    This paper introduces a new data transport architecture and protocol for storage that is implemented on wireless devices and that can be accessed through a short-range wireless access technology such as Bluetooth or 802.11. We call the protocol WATA (Wireless ATA), as its architecture is similar to current ATA and ATA-based technologies. In this paper, we give basic technical details of the protocol and discuss its main advantages and disadvantages over the current protocols, and talk about our decisions to implement a prototype system to see an actual implementation of the architecture.