Now showing items 26-45 of 252

  • Best effort query answering for mediators with union views 

    Papri, Rowshon Jahan (Wichita State University, 2011-07)
    Consider an SQL query that involves joins of several relations, optionally followed by selections and/or projections. It can be represented by a conjunctive datalog query Q without negation or arithmetic subgoals. We ...
  • Blind carrier frequency offset estimation for multicarrier systems 

    Qasaymeh, Mahmoud Mohammad (Wichita State University, 2009-05)
    A Multicarrier Communication (MCM) system such as an Orthogonal Frequency Division Multiplexing OFDM or Discrete Multi Tone (DMT) system has been shown to be an effective technique to combat multipath fading in wireless ...
  • Blind detection for two-hop relay network without direct link 

    Hodges, Shane Michael (Wichita State University, 2010-12)
    In practice, channel coefficient information may not be available. Hence, a blind detection may be necessary. In addition, the direct link from a source to a destination may not be available. Therefore, information may ...
  • Blind detection with unique identification in two-way relay channels 

    Li, Lun (Wichita State University, 2011-12)
    This thesis considers a two-way relay system whereby two nodes exchange information via a relay node. Amplify-and-forward (AF) is applied as a relaying strategy.The channel information is not available at both receivers. ...
  • Blind relay network with viterbi detection 

    Feng, Shuang (Wichita State University, 2010-12)
    This thesis compared the performance of a blind relay communication system with that of a non-blind relay communication system. For a blind system, a differential space-time block code (DSTBC) or a blind Viterbi detection ...
  • A bridge from stability to robust performance design of PID controllers in the frequency domain 

    Emami, Tooran (Wichita State University, 2009-12)
    A graphical technique for finding proportional integral derivative (PID) controllers that stabilize a given single-input-single-output (SISO) linear time-invariant (LTI) system of any order system with time-delay has ...
  • Capacity analysis and data concentration for smart grid communication networks at the power distribution level 

    Karimi, Babak (Wichita State University, 2014-12)
    The "smart grid" generally refers to a class of digital technology that allows for two-way communication between the electric power utility and its customers, as well as sensing along the transmission and distribution ...
  • Capacity of a modulo-sum simple relay network 

    Sagar, Youvaraj T. (Wichita State University, 2009-12)
    This thesis proposes the capacity of a modulo-sum simple relay network. In previous work related to relay channels, capacity was characterized in the case where noise was transmitted to the relay, and the closed-form ...
  • Channel statistics-dependent frequency hopping 

    Hannon, Matthew (Wichita State University, 2015-12)
    This paper studies a channel statistics-dependent, novel, frequency-hopping (FH) pattern generation scheme. Most existing FH patterns are determined by two encryption keys: one for FH in the frequency domain, and the other ...
  • Cluster-based energy-efficient MAC protocol for wireless sensor networks 

    Marrapu, Nikhil (Wichita State University, 2010-12)
    TheWireless Sensor Networks (WSNs) employs thousands of small sensors that communicate between themselves in a distributed manner using Medium Access Control (MAC) protocols. The energy required for wireless sensors is ...
  • Compact antennas for mimo communications 

    Jayasooriya, Chandana K. K. (Wichita State University, 2013-08)
    The newest cellular communication standard, 4G-LTE (Long Term Evolution) provides an all internet protocol (IP)-based solutions to the high data rate required of mobile communication applications. It offers 100 Mbit/s and ...
  • Compact multi-user wideband MIMO system using multiple-mode antennas 

    Mukherjee, Amitav (2007-05)
    A complete multiple-input multiple-output (MIMO) communication system with orthogonal frequency-division multiplexing (OFDM) based on multiple excitation modes for a single circular micro strip antenna is introduced. ...
  • Comparison study for multi-user MIMO channel estimation techniques 

    Khasawneh, Mohammad Naser Fawwaz (Wichita State University, 2009-08)
    Channel estimation problem is a crucial state of the art research topic that has been addressed in the literature for the past decade. The importance of such research area emerged from the fact that telecommunication ...
  • Comprehension of amplify-and-forward relay networks 

    Lee, Kanghee (Wichita State University, 2014-05)
    This dissertation comprehensively studies diverse cooperative and noncooperative amplify-and-forward (AF) multiple-input multiple-output (MIMO) wireless relay networks. Various gain matrices and vectors, such as relay ...
  • Computing ranked selection indexes for linear preference queries 

    Francis, Preeti (Wichita State University, 2015-12)
    The significant increase in data storage and its consumption in today's world brings the focus on efficient query processing. It is general practice to query several data sources for k data entities based on a ranking of ...
  • Connection probability in reference point group mobility model 

    Kaur, Ramneet (2006-12)
    In ad hoc wireless mobile networks, the mobility of wireless nodes plays a significant role in evaluating the network’s performance. As the nodes are mobile there is a frequent transition between the connections of nodes ...
  • Context-aware access control: An alternate privacy protection mechanism for online social networks 

    Maiti, Anindya (Wichita State University, 2014-07)
    The increasing popularity of online social networks (OSNs) is spawning new security and privacy concerns. Currently, a majority of OSNs offer very naive access control mechanisms that are primarily based on static access ...
  • Control of cable networks 

    Gao, Haihong (Wichita State University, 2012-12)
    A major issue for contemporary cable networks under flat pricing is that heavy users can cause severe network congestion and light users subsidize heavy users. This problem is exaggerated when network participants do not ...
  • Control-oriented modeling of ionic polymer-metal composite enabled hydrogen gas production 

    Nagpure, Tushar (Wichita State University, 2015-12)
    Hydrogen gas has been pointed out as a promising fuel with green and minimum emission for energy storage applications. Standard resources to extract hydrogen gas such as gasoline, propane and diesel are vulnerable to ...
  • Controller design of decentralized singularly perturbed systems 

    Danthuluri, Satya Vineela (Wichita State University, 2010-12)
    In this thesis, the performance of a decentralized system was analyzed based upon the design of the controller, either a reduced-order model or a full-order model. The singular perturbation technique was used to obtain the ...