Now showing items 331-350 of 1136

    • Fast, Exact Synthesis of Gaussian and nonGaussian Long-Range-Dependent Processes 

      Baraniuk, Richard; Crouse, Matthew (2009-04-15)
      1/f noise and statistically self-similar random processes such as fractional Brownian motion (fBm) and fractional Gaussian noise (fGn) are fundamental models for a host of real-world phenomena, from network traffic to ...
    • Fast, Exact Synthesis of Gaussian and nonGaussian Long-Range-Dependent Processes 

      Crouse, Matthew; Baraniuk, Richard G. (1999-01-15)
      1/<i>f</i> noise and statistically self-similar processes such as fractional Brownian motion (fBm) are vital for modeling numerous real-world phenomena, from network traffic to DNA to the stock market. Although several ...
    • Faster Sequential Universal Coding via Block Partitioning 

      Baron, Dror; Baraniuk, Richard G. (2006-04-01)
      Rissanen provided a sequential universal coding algorithm based on a block partitioning scheme, where the source model is estimated at the beginning of each block. This approach asymptotically approaches the entropy at the ...
    • Fault Detection and Fault Tolerance in Robotics 

      Visinsky, Monica L.; Walker, Ian D.; Cavallaro, Joseph R. (1991-07-01)
      Robots are used in inaccessible or hazardous environments in order to alleviate some of the time, cost and risk involved in preparing men to endure these conditions. In order to perform their expected tasks, the robots ...
    • Fault Detection and Fault Tolerance Methods for Robotics 

      Visinsky, Monica L. (1991-12-20)
      Fault tolerance is increasingly important in modern autonomous or industrial robots. The ability to detect and tolerate failures allows robots to effectively cope with internal failures and continue performing designated ...
    • Fault Residual Generation via Nonlinear Analytical Redundancy 

      Leuschen, Martin L.; Walker, Ian D.; Cavallaro, Joseph R. (2005-05-01)
      Fault detection is critical in many applications, and analytical redundancy (AR) has been the key underlying tool for many approaches to fault detection. However, the conventional AR approach is formally limited to linear ...
    • Fault Tolerant Algorithms and Architectures for Robotics 

      Hamilton, D. L.; Visinsky, Monica L.; Bennett, J. K.; Cavallaro, Joseph R.; Walker, Ian D. (1994-04-01)
      As robot tasks in space, nuclear, and medical environments become more widespread, the issues of reliability and safety for robots are becoming more critical. Attempts to address these issues have resulted in a a recent ...
    • Fault-Tolerant VLSI Processor Array for the SVD 

      Cavallaro, Joseph R.; Near, Christopher D.; Uyar, M. Umit (1989-10-01)
      Dynamic reconfiguration techniques are presented for a two-dimensional systolic array for the SVD of a matrix. Extra computation time is not required, since idle time inherent in the array is exploited. The scheme does not ...
    • Feature Extraction Techniques for Classification and Identification of Spectral Signatures 

      de Figueiredo, Rui J.P. (1976-04-20)
      Some of the results obtained at Rice University on the extraction of features from spectral signatures for the purpose of classifying and identifying these signatures are described.
    • Feedback gain in Multiple Antenna Systems 

      Bhashyam, Srikrishna; Sabharwal, Ashutosh; Aazhang, Behnaam (2002-05-20)
      Multiple antenna transmission and reception have been shown to significantly increase the achievable data rates of wireless systems. However, most of the existing analysis assumes perfect or no channel information at the ...
    • Fermi-edge superfluorescence from a quantum-degenerate electron-hole gas 

      Kim, Ji-Hee; Noe, G. Timothy II; McGill, Stephen A.; Wang, Yongrui; Wojcik, Aleksander K.; Belyanin, Alexey A.; Kono, Junichiro (2013)
      Nonequilibrium can be a source of order. This rather counterintuitive statement has been proven to be true through a variety of fluctuation-driven, self-organization behaviors exhibited by out-of-equilibrium, many-body ...
    • FFT-Accelerated Iterative MIMO Chip Equalizer Architecture For CDMA Downlink 

      Guo, Yuanbin; McCain, Dennis; Cavallaro, Joseph R. (2005-03-01)
      In this paper, we present a novel FFT-accelerated iterative Linear MMSE chip equalizer in the MIMO CDMA downlink receiver. The reversed form time-domain matrix multiplication in the Conjugate Gradient iteration is accelerated ...
    • Finite Backlog Effects on Downlink Scheduling 

      Ahmed, Nasir; Khojastepour, Mohammad; Sabharwal, Ashutosh; Aazhang, Behnaam (2003-11-20)
      In a multi-user downlink system, the use of channel estimates in the scheduling process can significantly improve the spectral efficiency. Recent work has shown that from a sum rate capacity standpoint, and assuming infinite ...
    • Finite Memory-length Linear Multiuser detection for Asyncchronous Communications 

      Juntti, Markku J.; Aazhang, Behnaam (1997-05-20)
      Decorrelating, linear, minimum mean-squared error (LMMSE), and noise-whitening multiuser detectors for code-division multiple-access systems (CDMA) are ideally infinite memory-length (referred to as IIR) detectors. To ...
    • Finite memory-length linear multiuser detection for asynchronous CDMA communications 

      Juntti, Markku J.; Aazhang, Behnaam (1997-10-20)
      Decorrelating, linear, minimum mean-squared error (LMMSE), and noise-whitening multiuser detectors for code-division multiple-access systems (CDMA) are ideally infinite memory-length (referred to as IIR) detectors. To ...
    • Finite Rate Feedback Design for Multiple Transmit Antennas 

      Mukkavilli, Krishna Kiran; Sabharwal, Ashutosh; Aazhang, Behnaam (2002-10-20)
      Many practical systems employ a feedback channel to convey the channel state information to the transmitter.The capacity of the feedback channels is usually limited to a few bits per frame. We design feedback based ...
    • Fixed Point Error Analysis Of Multiuser Detection and Synchronization Algorithms For CDMA Communication Systems 

      Sengupta, Chaitali; Das, Suman; Cavallaro, Joseph R.; Aazhang, Behnaam (1998-04-20)
      Conventional correlation based single-user techniques for Direct Sequence Code Division Multiple Access (DS-CDMA) wireless communication systems are susceptible to performance degradation due to interference from other ...
    • Flex-Sphere: An FPGA Configurable Sort-Free Sphere Detector For Multi-user MIMO Wireless Systems 

      Amiri, Kiarash; Dick, Chris; Rao, Raghu; Cavallaro, Joseph R. (2008-10-01)
      Spatial division multiplexing (SDM) in MIMO technology significantly increases the spectral efficiency, and hence capacity, of a wireless communication system: it is a core component of the next generation wireless systems, ...
    • A Flexible and Efficient Application Programming Interface (API) for a Customizable Proxy Cache 

      Pai, Vivek S.; Cox, Alan; Pai, Vijay S.; Zwaenepoel, Willy (2003-03-20)
      This paper describes the design, implementation, and performance of a simple yet powerful Application Programming Interface (API) for providing extended services in a proxy cache. This API facilitates the development of ...
    • A Flexible LDPC/Turbo Decoder Architecture 

      Sun, Yang; Cavallaro, Joseph R. (2011-07-01)
      Low-density parity-check (LDPC) codes and convolutional Turbo codes are two of the most powerful error correcting codes that are widely used in modern communication systems. In a multi-mode baseband receiver, both LDPC ...