Now showing items 503-522 of 1509

  • Fourier transform infrared spectroscopy of 6.1-Angstrom semiconductor quantum wells 

    Tang, Jun (2002)
    The 6.1-Angstrom (A) family of III-V semiconductors---InAs, GaSb, and AlSb and their alloys and heterostructures---has unique properties that may find application in next generation multi-functional semiconductor devices. ...
  • A Fourier-Prony Tauberian Approach to the Analysis of a Mixture of Delayed Signals 

    de Figueiredo, Rui J.P.; Hu, C.L. (1979-09-20)
    Let x and y be signals (i.e. real-valued functions of time) of finite duration and energy. In the present paper, we develop a frequency domain Prony approach for interpolating, or in general, approximating y(t) by ....
  • An FPGA Based Rapid Prototyping Platform for MIMO Systems 

    Murphy, Patrick; Lou, Feifei; Sabharwal, Ashutosh; Frantz, Patrick (2003-11-20)
    There exists a seemingly limitless demand for wireless communications systems capable of higher datarates with lower power consumption. While the demand for improvement in these systems seems limitless, the spectrum ...
  • An FPGA Implementation Of Alamouti's Transmit Diversity Technique 

    Murphy, Patrick; Frantz, Patrick; Dick, Chris (2003-10-01)
    This paper presents the FPGA implementation of a multiple antenna wireless communications system based on Alamouti's transmit diversity scheme. Alamouti's transmit diversty scheme is a space-time block code with support ...
  • FPGA Implementation of Dynamic Threshold Sphere Detection for MIMO Systems 

    Amiri, Kiarash; Cavallaro, Joseph R. (2006-11-01)
    In this paper, we consider the FPGA implementation of a modified sphere detection algorithm. We analyze breadth-first and depth-first search in sphere detection, and compare the relative performance and complexity. Based ...
  • FPGA Implementation of Matrix Inversion Using QRD-RLS Algorithm 

    Karkooti, Marjan; Cavallaro, Joseph R.; Dick, Chris (2005-11-01)
    This paper presents a novel architecture for matrix inversion by generalizing the QR decomposition-based recursive least square (RLS) algorithm. The use of Squared Givens rotations and a folded systolic array makes this ...
  • FPGA Implementation of Matrix Inversion Using QRD-RLS Algorithm 

    Karkooti, Marjan; Cavallaro, Joseph R.; Dick, Chris (2005-10-01)
    This paper presents a novel architecture for matrix inversion by generalizing the QR decomposition-based recursive least square (RLS) algorithm. The use of Squared Givens rotations and a folded systolic array makes this ...
  • FPGA in Wireless Communications Applications 

    Amiri, Kiarash; Duarte, Melissa; Cavallaro, Joseph R.; Dick, Chris; Rao, Raghu; Sabharwal, Ashutosh (2012-07-12)
    In the past decade we have witnessed explosive growth in the wireless communications industry with over 4 billion subscribers worldwide. While first and second generation systems focused on voice communications, third ...
  • FPGA Prototyping of A High Data Rate LTE Uplink Baseband Receiver 

    Wang, Guohui; Yin, Bei; Amiri, Kiarash; Sun, Yang; Wu, Michael; Cavallaro, Joseph R. (2009-11-01)
    The Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) standard is becoming the appropriate choice to pave the way for the next generation wireless and cellular standards. While the popular OFDM ...
  • An FPGA-based Daughtercard for TIs C6000 family of DSKs 

    Gadhiok, Manik; Hardy, Ricky; Murphy, Patrick; Frantz, Patrick; Choi, Hyeokho; Cavallaro, Joseph R. (2005-06-01)
    In this paper we present an FPGA-based daughtercard designed for TIs C6000 family of DSP Starter Kits (DSKs). The hardware, initially designed for a course project, provides a platform for studying heterogeneous systems ...
  • A FPGA­Based Experimental PHY for 802.11b WLAN 

    Lou, Feifei; Murphy, Patrick; Frantz, Patrick (2003-10-20)
    The swift proliferation of wireless data communication systems, and the ever-increasing demand for faster data rates requires that engineers be able to quickly design, implement and test new wireless algorithms for data ...
  • Fractional Brownian motion and data traffic modeling: The other end of the spectrum 

    Vehel, Jacques; Riedi, Rudolf H. (1997-01-20)
    We analyze the fractal behavior of the high frequency part of the Fourier spectrum of fBm using multifractal analysis and show that it is not consistent with what is measured on real traffic traces. We propose two extensions ...
  • Frequency Domain Synthesis of Multivariable Linear Regulators 

    Cheng, Lin-Fu; Pearson, J.B. (1977-04-20)
    This paper considers a general class of multivariable linear regulators and determines conditions under which there exist proper controllers such that output regulation is achieved with internal stability.
  • Frequency-Domain ICI Estimation, Shortening, and Cancellation in OFDM Receivers 

    Sestok, Charles K.; Radosavljevic, Predrag (2006-04-01)
    Orthogonal frequency division multiplexing (OFDM) communication systems encounter performance limitations due to time-varying channels common in wireless applications. The channel variations introduce inter-carrier ...
  • Full-Duplex Infrastructure Nodes: Achieving Long Range with Half-duplex Mobiles 

    Everett, Evan (2012-09-05)
    One of the primary sources of inefficiency in today's wireless networks is the half-duplex constraint - the assumption that nodes cannot transmit and receive simultaneously in the same band. The reason for this constraint ...
  • Full-duplex Wireless: Design, Implementation and Characterization 

    Duarte, Melissa (2012)
    One of the fundamental assumptions made in the design of wireless networks is that the wireless devices have to be half-duplex, i.e., they cannot simultaneously transmit and receive in the same frequency band. The key ...
  • Fundamental limits in spike sorting 

    Sheikh, Mona A. (2007)
    Spike sorting refers to the detection and classification of electric potentials (spikes) from multi-neuron recordings. It is a difficult but essential pre-processing step before neural data can be analyzed for information ...
  • Fundamental optical processes in armchair carbon nanotubes 

    Haroz, Erik H.; Duque, Juan G.; Tu, Xiaomin; Zheng, Ming; Walker, Angela R. Hight; Hauge, Robert H.; Doorn, Stephen K.; Kono, Junichiro (2013)
    Single-wall carbon nanotubes provide ideal model one-dimensional (1-D) condensed matter systems in which to address fundamental questions in many-body physics, while, at the same time, they are leading candidates for ...
  • A Further Investigation on AR-Vector Models for Text Independent Speaker Identification 

    Magrin-Chagnolleau, Ivan; Bimbot, Frederic (1996-01-01)
    In this paper, we investigate on the role of dynamic information on the performances of AR-vector models for speaker recognition. To this purpose, we design an experimental protocol that destroys the time structure of ...