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| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |  | Mathews, V. John; Schlegel, Christian | A blind adaptive projection receiver for CDMA systems | Abstract - This paper presents a blind and adaptive CDMA receiver that does not require knowledge of the spreading codes associated with users other than the ones of interest. Receivers for synchronous as well as asynchronous transmission by multiple users with error control coding are develope... | 1998 | |
| 2 |  | Stevens, Kenneth | A mathematical approach to a low power FFT architecture | Architecture and circuit design are the two most effective means of reducing power in CMOS VLSI. Mathematical manipulations have been applied to create a power efficient architecture of an FFT. This architecture has been implemented in asynchronous circuit technology that achieves significant powe... | 1998 | |
| 3 |  | Stevens, Kenneth | A single chip low power asynchronous implementation of an FFT algorithm for space applications | A fully asynchronous _x000C_fixed point FFT processor is introduced for low power space applications. The architecture is based on an algorithm developed by Suter and Stevens specifi_x000C_cally for a low power implementation. The novelty of this architecture lies in its high localization of compo... | 1998 | |
| 4 |  | Mathews, V. John | Adaptive parallel-cascade truncated volterra filters | Abstract-This paper studies adaptive truncated Volterra filters employing parallel-cascade structures. Parallel-cascade realizations implement higher order Volterra systems a s a parallel connection of multiplicative combinations of lower order truncated Volterra systems. A normalized LMS adaptive f... | 1998 | |
| 5 |  | Mathews, V. John | Adaptive, quadratic preprocessing of document images for binarization | Abstract-This paper presents an adaptive algorithm for preprocessing document images prior to binarization in character recognition problems. Our method is similar in its approach to the blind adaptive equalization of binary communication channels. The adaptive filter utilizes a quadratic system mod... | 1998 | |
| 6 |  | Mathews, V. John | An analytical model of the perceptual threshold function for multichannel image compression | ABSTRACT The human observer is often the final judge of the quality of compressed images. One way to design a compression system that attempts to reduce or eliminate subjective distortions in the coded images is to incorporate a perceptual threshold function model into the compression system. The... | 1998 | |
| 7 |  | Stevens, Kenneth; Myers, Chris J. | Average-case optimized technology mapping of one-hot domino circuits | This paper presents a technology mapping technique for optimizing the average-case delay of asynchronous combinational circuits implemented using domino logic and one-hot encoded outputs. The technique minimizes the critical path for common input patterns at the possible expense of making less commo... | 1998 | |
| 8 | | Myers, Chris J.; Stevens, Kenneth | Average-case optimized technology mapping of one-hot domino circuits* | This paper presents a technology mapping technique for optimizing the average-case delay of asynchronous combinational circuits implemented using domino logic and one-hot encoded outputs. The technique minimizes the critical path for common input patterns at the possible expense of making less commo... | 1998 | |
| 9 |  | Myers, Chris J. | Covering conditions and algorithms for the synthesis of speed-independent circuits | Abstract-This paper presents theory and algorithms for the synthesis of standard C-implementations of speed-independent circuits. These implementations are block-level circuits which may consist of atomic gates to perform complex functions in order to ensure hazard freedom. First, we present Boolean... | 1998 | |
| 10 |  | Furse, Cynthia M. | Faster than fourier -- ultra-efficient time-to-frequency domain conversions for FDTD | Two highly efficient methods of computing magnitude and phase from time-domain data are demonstrated. These methods, based on solution of linear equations, are found to be equally accurate and more efficient than Fourier transform methods (DIT and FFT) for limited numbers of Frequencies. These metho... | Finite-difference time-domain method; FDTD; Fourier transform methods; Sine wave magnitude; Sine wave phase | 1998 |
| 11 |  | Stringfellow, Gerald B. | Influence of tellurium doping on step bunching of GaAs (001) vicinal surfaces grown by organometallic vapor phase epitaxy | Atomic force microscopy has been used to investigate the influence of controlled tellurium Te incorporation on the step structure of GaAs grown by organometallic vapor phase epitaxy on vicinal 001 surfaces. Te doping, using the precursor diethyltelluride, is found to markedly decrease the surface r... | Epitaxial growth; Misorientation; Organometallic vapor phase epitaxy | 1998 |
| 12 |  | Mathews, V. John | Parallel-cascade realizations and approximations of truncated volterra systems | Abstract- This correspondence introduces parallel-cascade realizations of truncated Volterra systems with an arbitrary but finite order of nonlinearity. Parallel-cascade realizations implement higher order Volterra systems using parallel and multiplicative combinations of lower order Volterra system... | 1998 | |
| 13 |  | Stringfellow, Gerald B. | Step structure and ordering in GaInP | Presents information from an experiment on the step structure and ordering in GalnP. Information on the step spacing and degree of order in the epitaxial layers; Details on the experiment; Results from the experiment. | Physics; Ordering; Steps | 1998 |
| 14 |  | Stringfellow, Gerald B. | Step structure and ordering in Te-doped GaInP | The step structure and CuPt ordering in GaInP layers grown by organometallic vapor phase epitaxy on singular GaAs substrates have been investigated as a function of Te (DETe) doping using atomic force microscopy, and electrical and optical properties measurements. The degree of order decreases for T... | Surfaces; Te doping; Bandgap energy | 1998 |
| 15 |  | Harrison, Reid R. | Analog VLSI model of the fly elementary motion detector | Flies are capable of rapidly detecting and integrating visual motion information in behaviorly-relevant ways. The first stage of visual motion processing in flies is a retinotopic array of functional units known as elementary motion detectors (EMDs). Several decades ago, Reichardt and colleagues de... | 1998-01-01 | |
| 16 |  | Furse, Cynthia M.; Lazzi, Gianluca; Gandhi, Om P. | Comparison of FDTD computed and measured radiation patterns of commercial mobile telephones in presence of the human head | In this letter, finite-difference time-domain (FDTD) computed radiation patterns of mobile telephones are carefully compared with those measured in our laboratory. The question on the capability of the FDTD method to correctly predict the radiated electromagnetic fields of today's structurally comp... | FDTD; Finite-difference time-domain; Mobile antennas | 1998-01-01 |
| 17 |  | Furse, Cynthia M.; Gandhi, Om P. | Computations of SAR distributions or two anatomically based models of the human head using CAD files of commercial telephones and the parallelized FDTD code | A method for importing data from computer-aided design (CAD) files for a mobile telephone into finite-difference time-domain (FDTD) simulation software is described. Although the FDTD method is well suited for the bio-electromagnetic simulations and has become the method of choice for most research... | Specific absorption rates; SAR; CAD files; FDTD; Finite-difference time-domain | 1998-01-01 |
| 18 |  | Mathews, V. John | Perceptually lossless image compression | This paper presents an algorithm for perceptually lossless image compression. A compressed image is said to be perceptually lossless for a specified viewing distance if the reconstructed image and the original image appear identical to human observers when viewed from the specified distance. Our app... | 1998-01-01 | |
| 19 |  | Stringfellow, Gerald B.; Inglefield, Colin E.; Taylor, P. Craig | Quantum wells due to ordering in GaInP | CuPt ordering results in a reduction of the band-gap energy of GaInP. Thus, heterostructures and quantum wells can be produced by simply varying the order parameter, without changing the solid composition. Changes in the order parameter can be induced by changes in growth conditions. The disorder... | Band-gap energy; Growth temperature; Quantum wells | 1998-12-28 |
| 20 |  | Stringfellow, Gerald B. | Surface photoabsorption transients and ordering in GaInP | Heterostructures and quantum wells can be produced in GaInP without changing the solid composition by simply varying the order parameter. Since CuPt ordering reduces the band-gap energy, changes in the order parameter induced by changes in growth conditions result in heterostructures with band-ga... | Order parameters; Quantum wells; P-dimers | 1998-03-15 |
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