Now showing items 1252-1271 of 1736

    • Physical characterization of lithium niobate thin films on silicon substrates 

      Stone, Barbara Ann (1988)
      The structure and orientation of radio frequency sputtered lithium niobate (LiNbO$\sb3$) films on silicon substrates is determined using x-ray diffraction. The structure of the LiNbO$\sb3$ films is determined to be a strong ...
    • Physical Layer Algorithm and Hardware Verification of MIMO Relays Using Cooperative Partial Detection 

      Amiri, Kiarash; Wu, Michael; Duarte, Melissa; Cavallaro, Joseph R. (2010-03-01)
      Cooperative communication with multi-antenna relays can significantly increase the reliability and speed. However, cooperative MIMO detection would impose considerable complexity overhead onto the relay if a full ...
    • Physical layer algorithms with limited feedback: Power control and coding strategies 

      Khoshnevis, Ahmad (2007)
      The uncertainty in the received signal is the main limiting factor for the throughput of any communication system with limited resources. In this thesis we analyze the potential gain in throughput by managing channel ...
    • Picosecond Digital-to-Impulse (D2i) Radiators in Silicon 

      Assefzadeh, Mahdi (2014-11-24)
      Current techniques for terahertz (THz) time-domain spectroscopy (TDS) are based on femtosecond lasers and photoconductive antennas (PCAs). The PCA is the emitter and the detector of THz pulses and includes a THz antenna ...
    • Pipelining Multiple SVDs On A Single Processor Array 

      Kota, Kishore; Cavallaro, Joseph R. (1994-07-20)
      We present a new family of architectures for processor arrays to implement Jacobi SVD which allow systolic loading and unloading of input and result matrices. Unlike most of the previous SVD arrays in the literature, our ...
    • Placement-Related Problems in Shared Disk I/O 

      Sinclair, J.B.; Tang, J.; Varman, Peter J. (1996)
      In a shared-disk parallel I/O system, several processes may be accessing the disks concurrently. An important example is concurrent external merging arising in database management systems with multiple independent sort ...
    • Plasmonic Manipulation of Light for Sensing and Photovoltaic Applications 

      Sobhani Khakestar, Heidar (2012)
      Plasmonics is a successful new field of science and technology that exploits the exclusive optical properties of metallic nanostructures to manipulate and concentrate light at nano-meter length scales. When light hits the ...
    • Plasmonic nanostructures on silicon 

      Sundararajan, Sri Priya (2008)
      The intersection of silicon technology with the rapidly growing field of nanoplasmonics, provides a fertile ground for development of synergistic technologies. The optical and electrical properties of silicon are well ...
    • Plasmonic Polymers Unraveled Through Single Particle Spectroscopy 

      Slaughter, Liane S.; Wang, Lin-Yung; Willingham, Britain A.; Olson, Jana M.; Swanglap, Pattanawit; Dominguez-Medina, Sergio; Link, Stephan (8/13/2014)
      Plasmonic polymers are quasi one-dimensional assemblies of nanoparticles whose optical responses are governed by near-field coupling of localized surface plasmons. Through single particle extinction spectroscopy correlated ...
    • Platelets for Multiscale Analysis in Medical Imaging 

      Willett, Rebecca; Nowak, Robert David (2002-04-20)
      This paper describes the development and use of multiscale, platelet-based image reconstruction algorithms in medical imaging. Such algorithms are effective because platelets approximate images in certain (piecewise) ...
    • Platelets for Multiscale Analysis in Photon-Limited Imaging 

      Willett, Rebecca; Nowak, Robert David (2002-09-20)
      This paper proposes a new multiscale image decomposition based on platelets. Platelets are localized functions at various scales, locations, and orientations that produce piecewise linear image approximations. For smoothness ...
    • Platelets: A Multiscale Approach for Recovering Edges and Surfaces in Photon-Limited Medical Imaging 

      Willett, Rebecca; Nowak, Robert David (2003)
      This paper proposes a new multiscale image decomposition based on platelets. Platelets are localized functions at various scales, locations, and orientations that produce piecewise linear image approximations. Platelets ...
    • Polyimide-based field effect transistor structures 

      Steele, Jennifer Marie (1999)
      Because of the electrical insulating properties of polyimide, it is widely used in the packaging of semiconductor chips. However, it has been documented that the electrical resistivity can be decreased by several orders ...
    • Polynomial Root Finding 

      Lang, Markus; Frenzel, Bernhard-Christian (1994-10-01)
      Finding polynomial roots rapidly and accurately is an important problem in many areas of signal processing. We present a program which is superior in speed and accuracy to the best methods to our knowledge, i.e., Jenkins/Traub ...
    • Post-Compensation of RF Non-Linearity in Mobile OFDM Systems by Estimation of Memory-less Polynomial 

      Guo, Yuanbin; Cavallaro, Joseph R. (2002-05-01)
      The high peak-to-average-power-ratio (PAPR) of OFDM systems introduces inevitable non-linear distortion in the transmitter and causes both in-band distortion and out-of-band spectrum re-growth. In this paper we propose a ...
    • Power efficient broadcast scheduling with delay deadlines 

      Rajan, Dinesh; Sabharwal, Ashutosh; Aazhang, Behnaam (2004-10-01)
      In this paper, we present a framework for the design of minimal power schedulers that satisfy average packet delay bounds for multiple users in a Gaussian wireless broadcast channel. We completely characterize the achievable ...
    • Power efficient transmission policies for multimedia traffic over wireless channels 

      Rajan, Dinesh (2002-04-20)
      The current and future wireless systems need to support a multitude of services with a wide range of data rates and reliability requirements. The limited battery resource at a mobile terminal coupled with the hostile ...
    • Power efficient transmission policies for multimedia traffic over wireless channels 

      Rajan, Dinesh (2002)
      The current and future wireless systems need to support a multitude of services with a wide range of data rates and reliability requirements. The limited battery resource at a mobile terminal coupled with the hostile ...
    • Power Issues in Communication Systems 

      Ahmed, Nasir (2002-04-20)
      In this work, we are concerned with power efficient communication techniques for wireless mobile devices. In this direction the effects of nonlinear amplifiers in communications systems are first studied, as they tend to ...
    • Power issues in communication systems 

      Ahmed, Nasir (2002)
      In this work, we are concerned with power efficient communication techniques for wireless mobile devices. In this direction the effects of nonlinear amplifiers in communications systems are first studied, as they tend to ...