Now showing items 291-310 of 1159

    • Efficient VLSI architectures for multiuser channel estimation in wireless base-station receivers 

      Rajagopal, Sridhar; Bhashyam, Srikrishna; Cavallaro, Joseph R.; Aazhang, Behnaam (2002-06-20)
      This paper presents a reduced-complexity, fixed-point algorithm and efficient real-time VLSI architectures for multiuser channel estimation, one of the core baseband processing operations in wireless base-station receivers ...
    • Efficient VLSI Architectures for Recursive Vandermonde QR Decomposition in Broadband OFDM Pre-distortion 

      Guo, Yuanbin (2005-03-01)
      The Vandermonde system is used in OFDM predistortion to enhance the power efficiency dramatically. In this paper, we study efficient FPGA architectures of a recursive algorithm for the Cholesky and QR factorization of ...
    • Electrically tunable hot-silicon terahertz attenuator 

      Wang, Minjie; Vajtai, Robert; Ajayan, Pulickel M.; Kono, Junichiro (2014)
      We have developed a continuously tunable, broadband terahertz attenuator with a transmission tuning range greater than 103. Attenuation tuning is achieved electrically, by simply changing the DC voltage applied to a heating ...
    • Elimination of Metastatic Melanoma Using Gold Nanoshell-Enabled Photothermal Therapy and Adoptive T Cell Transfer 

      Bear, Adham S.; Kennedy, Laura C.; Young, Joseph K.; Perna, Serena K.; Almeida, Joao Paulo Mattos; Lin, Adam Y.; Eckels, Phillip C.; Drezek, Rebekah A.; Foster, Aaron E. (2013)
      Ablative treatments such as photothermal therapy (PTT) are attractive anticancer strategies because they debulk accessible tumor sites while simultaneously priming antitumor immune responses. However, the immune response ...
    • EM-Based Multiuser Detection in Fast Fading Multipath Environments 

      Borran, Mohammad Jaber; Aazhang, Behnaam (2002-08-01)
      We address the problem of multiuser detection in fast fading multipath environments for DS-CDMA systems. In fast fading scenarios, temporal variations of the channel cause significant performance degradation even with the ...
    • The Embedded Triangles Algorithm for Distributed Estimation in Sensor Networks 

      Delouille, Veronique; Neelamani, Ramesh; Chandrasekaran, Venkat; Baraniuk, Richard G. (2003-09-01)
      We propose a new iterative distributed estimation algorithm for Gaussian hidden Markov graphical models with loops. We decompose a loopy graph into a number of linked <i>embedded triangles</i> and then apply a parallel ...
    • Empirical Mode Decomposition Based Frequency Attributes 

      Magrin-Chagnolleau, Ivan; Baraniuk, Richard G. (1999-11-01)
      This paper describes a new technique, called <i>Empirical Mode Decomposition</i> (EMD), which allows the decomposition of one-dimensional signals into intrinsic oscillatory modes. Each component, called <i>Intrinsic Mode ...
    • Enhanced Microlithography Using Combined Phase Shifting and Off-axis Illumination 

      Erdelyi, Miklos; Bor, Zsolt; Cavallaro, Joseph R.; Szabo, Gabor; Wilson, William L.; Sengupta, Chaitali; Smayling, Michael C.; Tittel, Frank K. (1995-12-01)
      Off-axis illumination is a promising optical microlithography technique which can be used to improve the image quality of line-space patterns. With this method the image is produced by the zero and first order diffracted ...
    • Enhanced noise at high bias in atomic-scale Au break junctions 

      Chen, Ruoyu; Wheeler, Patrick J.; Di Ventra, M.; Natelson,D. (2014)
      Heating in nanoscale systems driven out of equilibrium is of fundamental importance, has ramifications for technological applications, and is a challenge to characterize experimentally. Prior experiments using nanoscale ...
    • Enhanced Power Efficiency of Mobile OFDM Radio using Pre-distortion and Post-compensation 

      Guo, Yuanbin; Cavallaro, Joseph R. (2002-09-20)
      High power efficiency is an important requirement in cellular transmitter radios. OFDM systems require very linear transmission because of high peak-to-average power-ratio (PAPR). However, linear power amplifiers (PA) have ...
    • Enhanced Pseudo Power Signatures for Nonstationary Signal Classification: The Projector Approach 

      Venkatachalam, Vidya; Aravena, Jorge.L. (1999-05-01)
      The classification of nonstationary signals of unknown duration is of great importance in areas like oil exploration, moving target detection, and pattern recognition. In an earlier work, we provided a solution to this ...
    • Enhanced signatures for event classification: The projector approach 

      Venkatachalam, Vidya; Aravena, Jorge.L. (1998-10-01)
      The classification of nonstationary signals of unknown duration is of great importance in areas like oil exploration, moving target detection, and pattern recognition. In an earlier work, we provided a solution to this ...
    • Enhanced VLSI Manufacturability Using an Integrated CAD Framework 

      Fossati, Humberto M.; Tittel, Frank K.; Wilson, William L.; Cavallaro, Joseph R. (1994-01-01)
      Continued improvements in VLSI performance, circuit density and production costs are possible, in part, do to significant advances in lithography. As feature sizes get smaller, design houses are faced with either improving ...
    • Enhancement of Decompressed Images at Low Bit Rates 

      Gopinath, Ramesh A.; Lang, Markus; Guo, Haitao; Odegard, Jan E. (1994-07-20)
      Transform coding at low bit rates introduces artifacts associated with the basis functions of the transform. For example, decompressed images based on the DCT (discrete cosine transform)- like JPEG<sup>16</sup> - exhibit ...
    • Enhancement of the Electron Spin Resonance of Single-Walled Carbon Nanotubes by Oxygen Removal 

      Rice, William D.; Weber, Ralph T.; Leonard, Ashley D.; Tour, James M.; Nikolaev, Pavel; Arepalli, Sivaram; Berka, Vladimir; Tsai, Ah-Lim; Kono, Junichiro (2012)
      We have observed a nearly 4-fold increase in the electron spin resonance (ESR) signal from an ensemble of single-walled carbon nanotubes (SWCNTs) due to oxygen desorption. By performing temperature-dependent ESR spectroscopy ...
    • Enhancement of the Electron Spin Resonance of Single-Walled Carbon Nanotubes by Oxygen Removal 

      Rice, William D.; Weber, Ralph T.; Leonard, Ashley D.; Tour, James M.; Nikolaev, Pavel; Arepalli, Sivaram; Berka, Vladimir; Tsai, Ah-Lim; Kono, Junichiro (2012)
      We have observed a nearly 4-fold increase in the electron spin resonance (ESR) signal from an ensemble of single-walled carbon nanotubes (SWCNTs) due to oxygen desorption. By performing temperature-dependent ESR spectroscopy ...
    • Equivalence of Generalized Joint Signal Representations of Arbitrary Variables 

      Sayeed, Akbar M.; Jones, Douglas L. (1996-12-20)
      Joint signal representations (JSRs) of arbitrary variables generalize time-frequency representations (TFRs) to a much broader class of nonstationary signal characteristics. Two main distributional approaches to JSRs of ...
    • The Equivalent Circuit Concept: The Current-Source Equivalent 

      Johnson, Don (2003-05-20)
      The equivalent circuit concept derives from the Superposition Principle and Ohm's Law. Two forms of the equivalent circuit, the Thevenin equivalent and the Norton equivalent, distill any linear circuit into a source and ...
    • Estimation-Quantization Geometry Coding Using Normal Meshes 

      Lavu, Sridhar; Choi, Hyeokho; Baraniuk, Richard G. (2003-03-01)
      We propose a new algorithm for compressing three-dimensional triangular mesh data used for representing surfaces. We apply the Estimation-Quantization (EQ) algorithm originally designed for still image compression to the ...
    • Evaluating the reliability of prototype degradable systems 

      Leuschen, Martin L.; Walker, Ian D.; Cavallaro, Joseph R. (2001-04-01)
      The technique introduced in this paper is a new technique for analyzing fault tolerant designs under considerable uncertainty, such as seen in unique or few-of-a-kind devices in poorly known environments or pre-prototype ...