Now showing items 629-648 of 1107

    • Multitier Wireless Systems 

      Aazhang, Behnaam; Cavallaro, Joseph R. (2000-05-01)
      Next-generation computing systems will be highly integrated using wireless networking. The Rice Everywhere NEtwork (RENE) project is exploring the integration of WCDMA cellular systems, high speed wireless LANs, and home ...
    • Multiuser Channel Estimation and Tracking for Long Code CDMA Systems 

      Bhashyam, Srikrishna; Aazhang, Behnaam (2002-01-15)
      Channel estimation techniques for code-division multiple access (CDMA) systems need to combat multiple access interference (MAI) effectively. Most existing estimation techniques are designed for CDMA systems with short ...
    • Multiuser Channel Estimation for Long Code CDMA Systems 

      Bhashyam, Srikrishna; Aazhang, Behnaam (2000-09-20)
      Channel estimation techniques for code-division multiple access (CDMA) systems need to combat multiple access interference (MAI) effectively. Most existing estimation techniques are designed for CDMA systems with short ...
    • Multiuser detection in fast-fading multipath environments 

      Sayeed, Akbar M.; Sendonaris, Andrew; Aazhang, Behnaam (1998-12-20)
      We propose a new framework for multiuser detection in fast-fading channels that are encountered in many mobile communication scenarios. Existing multiuser RAKE receivers, developed to combat multipath fading and multiuser ...
    • Multiuser detection in fast-fading multipath environments 

      Sayeed, Akbar M.; Aazhang, Behnaam (2001-10-20)
      We propose a new framework for multiuser detection in fast-fading channels that are encountered in many mobile communication scenarios. Existing multiuser RAKE receivers, developed to combat multipath fading and multiuser ...
    • Multiuser detectors for fast-fading multipath channels 

      Sayeed, Akbar M.; Sendonaris, Andrew; Aazhang, Behnaam (1997-10-20)
      We propose a new framework for multiuser detection in fast fading channels that are encountered in many mobile communication scenarios. The detectors proposed in this paper employ a novel multiuser receiver structure based ...
    • Multiuser Information Processing in Wireless Communication 

      Das, Suman (2000-09-20)
      Wireless channel is not very conducive towards error-free raw data transmission. On the other hand the tremendous growth in wireless services has made the channel bandwidth a scarce resource and effective utilization of ...
    • A multiuser receiver for code division multiple access communications over multipath channels 

      Fawer, Urs; Aazhang, Behnaam (1995-02-20)
      A multiuser communication system is considered where K users share a channel with multipath propagation by using code division for multiple access. Data modulation is carried out by binary phase shift keying and direct ...
    • Multiuser receivers for code-division multiple-access systems with trellis-based modulation 

      Fawer, Urs; Aazhang, Behnaam (1996-10-20)
      A code-division multiple-access (CDMA) communication system is studied where a trellis-based scheme is used for data encoding and modulation. The signature sequences (spreading codes), which are assigned to the direct-sequence ...
    • Myoelectric Teleoperation of a Complex Robotic Hand 

      Farry, Kristin A; Walker, Ian D; Baraniuk, Richard G. (1996-10-01)
      Teleoperation continues to be a primary control mode in robotics applications, particularly for robots with complex hands. This paper details a novel method of teleoperation of complex anthropomorphic robotic hands: ...
    • Nanoparticles Heat through Light Localization 

      Hogan, Nathaniel J.; Urban, Alexander S.; Ayala-Orozco, Ciceron; Pimpinelli, Alberto; Nordlander, Peter; Halas, Naomi J. (2014)
      Aqueous solutions containing light-absorbing nanoparticles have recently been shown to produce steam at high efficiencies upon solar illumination, even when the temperature of the bulk fluid volume remains far below its ...
    • Nanostructure investigations of nonlinear differential conductance in NdNiO3 thin films 

      Hardy, Will J.; Ji, Heng; Mikheev, Evgeny; Stemmer, Susanne; Natelson, Douglas (2014)
      Transport measurements on thin films of NdNiO3 reveal a crossover to a regime of pronounced nonlinear conduction below the well-known metal-insulator transition temperature. The evolution of the transport properties at ...
    • Nanowire electrodes for high-density stimulation and measurement of neural circuits 

      Robinson, Jacob T.; Jorgolli, Marsela; Park, Hongkun (2013-03-12)
      Brain-machine interfaces (BMIs) that can precisely monitor and control neural activity will likely require new hardware with improved resolution and specificity. New nanofabricated electrodes with feature sizes and densities ...
    • Near Best Tree Approximation 

      Baraniuk, Richard G.; DeVore, Ronald A.; Kyriazis, George; Yu, Xiang Ming (2002-01-15)
      Tree approximation is a form of nonlinear wavelet approximation that appears naturally in applications such as image compression and entropy encoding. The distinction between tree approximation and the more familiar ...
    • Near-Far Resistant Code Synchronization For CDMA systems - An Implementation Perspective 

      Haller, Bruno; Cavallaro, Joseph R.; Aazhang, Behnaam (1996-04-20)
      In this paper we evaluate and compare several algorithms based on eigenanalysis techniques for near-far resistant code acquisition and tracking, i.e., delay estimation in multiuser CDMA communication systems under different ...
    • Network and User Driven Alpha-Beta Onâ Off Source Model for Network Traffic 

      Sarvotham, Shriram; Riedi, Rudolf H.; Baraniuk, Richard G. (2005-06-01)
      We shed light on the effect of network resources and user behavior on network traffic through a physically motivated model. The classical onâ off model successfully captures the long-range, second-order correlations of ...
    • Network Channel Estimation in Cooperative Wireless Networks 

      Khoshnevis, Ahmad; Sabharwal, Ashutosh (2003-05-20)
      In distributed wireless networks, where nodes actively participate in helping communication for other nodes, they are typically unaware of their neighourhood and hence have to "estimate" it before sending any useful data. ...
    • Network Loss Inference Using Unicast End-to-End Measurement 

      Coates, Mark J.; Nowak, Robert David (2000-09-20)
      The fundamental objective of this work is to determine the extent to which unicast, end-to-end network measurement is capable of determining internal network losses. The major contributions of this paper are two-fold: we ...
    • Network Traffic Modeling using a Multifractal Wavelet Model 

      Riedi, Rudolf H.; Ribeiro, Vinay Joseph; Crouse, Matthew; Baraniuk, Richard G. (2000-07-01)
      In this paper, we develop a simple and powerful multiscale model for syntheizing nonFaussian, long-range dependent (LRD) network traffic. Although wavelets effectively decorrelate LRD data, wavelet-based models have generally ...
    • Network Traffic Modeling using a Multifractal Wavelet Model 

      Riedi, Rudolf H.; Crouse, Matthew; Ribeiro, Vinay Joseph; Baraniuk, Richard G. (1999-02-01)
      In this paper, we describe a new multiscale model for characterizing positive-valued and long-range dependent data. The model uses the Haar wavelet transform and puts a constraint on the wavelet coefficients to guarantee ...