Now showing items 1-20 of 268

  • 802.11b Operating in a Mobile Channel: Performance and Challenges 

    Steger, Christopher; Radosavljevic, Predrag; Frantz, Patrick (2003-09-20)
    In the past, the worlds of wireless voice and data transmission have been largely disjoint. Voice traffic has been carried over circuit-switched cellular links, and data has been largely restricted to packet-switched ...
  • Adaptive Fault Detection and Tolerance for Robots 

    Visinsky, Monica L.; Cavallaro, Joseph R.; Walker, Ian D. (TSI Press, 1994-08-01)
    In existing robot fault detection schemes, sensed values of the joint status (position, velocity, etc.) are typically compared against expected or desired values, and if a given threshold is exceeded, a fault is inferred. ...
  • Advanced MIMO-CDMA Receiver for Interference Suppression: Algorithms, System-on-Chip Architectures and Design Methodology 

    Guo, Yuanbin (2005-05-01)
    MIMO (Multiple Input Multiple Output) technology is proposed in CDMA systems for much higher rate packet services. The receiver architecture is essential for the mobile devices to support high speed multimedia service. ...
  • Advanced Techniques for Next-Generation Wireless Systems 

    Sendonaris, Andrew (1999-08-20)
    In order to meet the demands of next-generation wireless systems, which will be required to support multirate multimedia at high data rates, it is necessary to employ advanced algorithms and techniques that enable the ...
  • Analysis of Robots for Hazardous Environments 

    Harpel, Barbara McLaughlin; Dugan, Joanne Bechta; Walker, Ian D.; Cavallaro, Joseph R. (IEEE, 1997-01-01)
    Reliability analysis of fault tolerant systems often ignores the small probability that a failure might not be detected or, if detected, may not be properly handled. The probability that the failure is detected and properly ...
  • Analyzing Dynamics and Stimulus Feature Dependence in the Information Processing of Crayfish Sustaining Fibers 

    Rozell, Chris (2002-04-20)
    The sustaining fiber (SF) stage of the crayfish visual system converts analog stimulus representations to spike train signals. A recent theory quantifies a system's information processing capabilities and relates to ...
  • Antenna Arrays for Wireless CDMA Communication Systems 

    Madyastha, Raghu (1997-05-20)
    The estimation of code delays along with amplitudes and phases of different users constitutes the first stage in the demodulation process in a CDMA communication system. The delay estimation stage is termed the acquisition ...
  • Application-Specific Accelerators for Communications 

    Sun, Yang; Amiri, Kiarash; Brogioli, Michael; Cavallaro, Joseph R. (Springer Science+Business Media, LLC, 2010-01-01)
    For computation-intensive digital signal processing algorithms, complexity is exceeding the processing capabilities of general-purpose digital signal processors (DSPs). In some of these applications, DSP hardware accelerators ...
  • Architecture and Algorithm for a Stochastic Soft-output MIMO Detector 

    Amiri, Kiarash; Radosavljevic, Predrag; Cavallaro, Joseph R. (IEEE, 2007-11-04)
    In this paper, we propose a novel architecture for a soft-output stochastic detector in multiple-input, multiple-output (MIMO) systems. The stochastic properties of this detector are studied and derived in this work, ...
  • Architecture and Algorithm for a Stochastic Soft-output MIMO Detector 

    Amiri, Kiarash; Radosavljevic, Predrag; Cavallaro, Joseph R. (IEEE, 2007-11-01)
    In this paper, we propose a novel architecture for a soft-output stochastic detector in multiple-input, multiple-output (MIMO) systems. The stochastic properties of this detector are studied and derived in this work, and ...
  • Architecture and Algorithms for Scalable Mobile QoS 

    Sadeghi, Bahareh (2000-04-20)
    We develop a simple analytical model to study the system and illustrate several key components of the approach. We formulate the problem of how to group the cells to form the virtual system as an optimization problem and ...
  • ARCHITECTURE DESIGN AND IMPLEMENTATION OF THE INCREASING RADIUS - LIST SPHERE DETECTOR ALGORITHM 

    Myllylä, Markus; Juntti, Markku; Cavallaro, Joseph R. (IEEE, 2009-04-01)
    A list sphere detector (LSD) is an enhancement of a sphere detector (SD) that can be used to approximate the optimal MAP detector. In this paper, we introduce a novel architecture for the increasing radius (IR)-LSD algorithm, ...
  • Architecture Design and Implementation of the Metric First List Sphere Detector Algorithm 

    Myllylä, Markus; Cavallaro, Joseph R.; Juntti, Markku (IEEE, 2011-05-01)
    Soft-output detection of a multiple-input–multiple-output (MIMO) signal pose a significant challenge in future wireless systems. In this paper, we introduce a soft-output modified metric first (MMF)-LSD algorithm for MIMO ...
  • Architectures for Cognitive Radio Testbeds and Demonstrators – An Overview 

    Gustafsson, Oscar; Amiri, Kiarash; Andersson, Dennis; Blad, Anton; Bonner, Christian; Cavallaro, Joseph R.; Declerck, Jeroen; Dejonghe, Antoine; Eliardsson, Patrik; Glasse, Miguel; Hayar, Aawatif; Hollevoet, Lieven; Hunter, Chris; Joshi, Madhura; Kaltenberger, Florian; Knopp, Raymond; Le, Khanh; Miljanic, Zoran; Murphy, Patrick; Naessens, Frederik; Nikaein, Navid; Nussbaum, Dominique; Pacalet, Renaud; Raghavan, Praveen; Sabharwal, Ashutosh; Sarode, Onkar; Spasojevic, Predrag; Sun, Yang; Tullberg, Hugo M.; Vander Aa, Tom; Van der Perre, Liesbet; Wetterwald, Michelle; Wu, Michael (IEEE, 2010-06-01)
    Wireless communication standards are developed at an ever-increasing rate of pace, and significant amounts of effort is put into research for new communication methods and concepts. On the physical layer, such topics include ...
  • Architectures for Heterogeneous Multi-Tier Networks 

    Cavallaro, Joseph R. (2002-01-15)
    Next-generation wireless computing platforms will contain flexible communications capabilites. At Rice University, the Rice Everywhere NEtwork (RENE) project is investigating a multi-standard, multi-tier integration of ...
  • Arithmetic Acceleration Techniques for Wireless Communication Receivers 

    Das, Suman; Rajagopal, Sridhar; Sengupta, Chaitali; Cavallaro, Joseph R. (1999-10-20)
    We develop techniques to accelerate the implementation of the next generation wireless communication algorithms in hardware. We discuss an implementation of a key computationally intensive baseband algorithm for joint ...
  • ASIC Implementation Comparison of SIC and LSD Receivers for MIMO-OFDM 

    Ketonen, Johanna; Myllylä, Markus; Juntti, Markku; Cavallaro, Joseph R. (IEEE, 2008-10-01)
    MIMO-OFDM receivers with horizontal encoding are considered in this paper. The successive interference cancellation (SIC) algorithm is compared to the K-best list sphere detector (LSD). A modification to the K-best LSD ...
  • Automated Evaluation of Critical Features in VLSI Layouts Based on Photolithographic Simulations 

    Cavallaro, Joseph R.; Sengupta, Chaitali; Tittel, Frank K.; Wilson, William L. Jr. (SME Press, 1996-01-01)
    This paper describes a CAD tool (An Integrated CAD Framework) which links VLSI layout editors to lithographic simulators and provides information on the simulated resolution of a feature to the circuit designer. The designer ...
  • Automated Evaluation of Critical Features in VLSI Layouts Based on Photolithographic Simulations 

    Sengupta, Chaitali; Cavallaro, Joseph R.; Wilson, William L.; Tittel, Frank K. (IEEE, 1997-11-01)
    In this paper, we address the problem of identifying and evaluating “critical features” in an integrated circuit (IC) layout. The “critical features” (e.g., nested elbows and open ends) are areas in the layout that are ...
  • Baseband Architecture Design for Future Wireless Base-Station Receivers 

    Rajagopal, Sridhar (2000-05-20)
    This thesis demonstrates designing efficient algorithms and architectures to meet the real-time requirements of future wireless base-station receivers. Next generation receivers require orders-of-magnitude performance ...