Browsing Electrical and Computer Engineering by Title
Now showing items 651-670 of 1761
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Graphene Ambipolar Multiplier Phase Detector
(2011-10)We report the experimental demonstration of a multiplier phase detector implemented with a single top-gated graphene transistor. Ambipolar current conduction in graphene transistors enables simplification of the design ... -
Graphene Photonic Devices for Terahertz and Mid-Infrared
(2013-11-08)Graphene and other strictly two-dimensional materials are the rising stars on the horizon of material science, condensed matter physics and engineering. The richness of optical and electronic properties of graphene attract ... -
Half-Duplex Estimate-and-Forward Relaying: Bounds and Code Design
(2006-07-01)We propose a coding scheme for half-duplex estimate-and-forward relaying. Our first contribution is to present an achievable rate for the estimate-and-forward protocol. We also derive the achievable rate for the special ... -
Half-Duplex Estimate-and-Forward Relaying:Bounds and Code Design
(2006-01-01)We propose a coding scheme for half-duplex estimate-and-forward relaying. Our first contribution is to present an achievable rate for the estimate-and-forward protocol. We also derive the achievable rate for the special ... -
Handset Algorithms & Architectures for Blind Channel Estimation & Detection
(2000-05-20)Multiple access is an important consideration in the design and implementation of wireless communications systems. Code division multiple access (CDMA) is one method for providing multiple access in a wireless system. In ... -
Handset Detector Architectures for DS-CDMA Wireless Systems
(2002-05-20)This paper investigates detector architectures for wireless handsets employing DS-CDMA. The code-matched filter (MF) and minimum output energy (MOE) detectors are analyzed with respect to fixed-point arithmetic behavior. ... -
Hardware design issues for a mobile unit for next generation CDMA systems
(1998-07-20)This paper addresses hardware design issues of a mobile receiver for future generation direct sequence CDMA wireless communication systems. In the design of a mobile unit, fixed-point hardware is an attractive alternative ... -
A Hardware Testbed for the Implementation and Evaluation of MIMO Algorithms
(2003-10-20)As the demand for higher performance wireless communications continues to grow, novel algorithms have been developed which provide increased performance and efficiency. One such class of algorithms involves the use of ... -
Hardware/Software Co-design Methodology and DSP/FPGA Partitioning: A Case Study for Meeting Real-Time Processing Deadlines in 3.5G Mobile Receivers
(2006-08-01)This paper presents a DSP/FPGA hardware/software partitioning methodology for signal processing workloads. The example workload is the channel equalization and user-detection in HSDPA wireless standard for 3.5G mobile ... -
Hermitian Optimization and Scalable VLSI Architecture for Circulant Approximated MIMO Equalizer in CDMA Downlink
(2005-09-01)In this paper, we propose a parallel and pipelined VLSI architecture for a circulant approximated equalizer for the MIMOCDMA systems. The FFT-based tap solver reduces the Direct-Matrix-Inverse of the size (NF x NF) to the ... -
Hidden Markov Models for Wavelet-based Signal Processing
(1996-11-01)Current wavelet-based statistical signal and image processing techniques such as shrinkage and filtering treat the wavelet coefficients as though they were statistically independent. This assumption is unrealistic; considering ... -
Hidden Markov Tree Modeling of Complex Wavelet Transforms
(2000-06-01)Multiresolution signal and image models such as the hidden Markov tree aim to capture the statistical structure of smooth and singular (edgy) regions. Unfortunately, models based on the orthogonal wavelet transform suffer ... -
Hidden Markov Tree Models for Complex Wavelet Transforms
(2002-05-01)Multiresolution models such as the hidden Markov tree (HMT) aim to capture the statistical structure of signals and images by leveraging two key wavelet transform properties: wavelet coefficients representing smooth/singular ... -
A Hierarchical and Multiscale Analysis of E-Business Workloads
(2002-01-15)Understanding the nature and characteristics of E-business workloads is a crucial step to improve the quality of service offered to customers in electronic business environments. Using a multi-layer hierarchical model, ... -
Hierarchical robot path planning using a distributed blackboard
(1990)Hierarchical path planning techniques for Intelligent Autonomous Mobile Robots (IAMRs) attempt to subdivide the overall task of path planning into several layers. This subdivision is made more difficult by the physical ... -
A Hierarchical Wavelet-Based Framework for Pattern Analysis and Synthesis
(2000-04-20)Despite their success in other areas of statsitical signal processing, current wavelet-based image models are inadequate for modeling patterns in images, due to the presence of unknown transformations inherent in most ... -
Hierarchical Wavelet-Based Image Model for Pattern Analysis and Synthesis
(2000-07-20)Despite their success in other areas of statistical signal processing, current wavelet-based image models are inadequate for modeling patterns in images, due to the presence of unknown transformations (e.g., translation, ... -
High Chromaticity Aluminum Plasmonic Pixels for Active Liquid Crystal Displays
(2016)Chromatic devices such as flat panel displays could, in principle, be substantially improved by incorporating aluminum plasmonic nanostructures instead of conventional chromophores that are susceptible to photobleaching. ...
