A flexible and reconfigurable signal processing ASIC architecture has been developed, simulated and synthesized. The proposed architecture can be used to realize any one of several functional blocks needed for the physical layer implementation of high speed data communication systems operating at symbol rates over 60 Msamples/sec. In fact, multiple instances of a chip based on this architecture...

Compression of higher-order solitons in nonlinear optical loop mirrors (NOLMs) constructed from dispersion decreasing fibers (DDFs) is investigated numerically. Results show that when compared to a soliton-effect pulse compressor in which only a piece of DDF is used, a NOLM constructed from a DDF not only suppresses pulse pedestals but also significantly reduces frequency chirps of the compress...

In this paper, a novel design approach for a phase to sinusoid amplitude converter (PSAC) has been investigated. Two segments have been used to approximate the first sine quadrant. A first linear segment is used to fit the region near the zero point, while a second fourth-order parabolic segment is used to approximate the rest of the sine curve. The phase sample, where the polynomial changed, w...

This article includes the description of data information from an idea generation task (alternate uses task, (Guilford, 1967) [1]) and a letter-by-letter reading task under two background brightness conditions with healthy adults as well as a baseline measurement and questionnaire data (SIPI (Huba et al., 1981) [2]; DDFS (Singer and Antrobus, 1972) [3], 1963; RIBS (Runco et al., 2001) [4]). Dat...

There are studies indicate that audible sound wave could have effects on propagation growth through catalyzing hearing sense organs, which would bring a series of physiological and biological chemistry reaction. The soundpressure level and frequency are important factors in propagation growth. In this study, an experimental system of audio generator was developed for investigating sound wave ef...

We introduce deep-field metacalibration, a new technique that reduces the pixel noise in metacalibration estimators of weak lensing shear signals by using deeper imaging survey for calibration. In standard when estimating object's response, extra is added to correct effect shearing image, increasing uncertainty on estimates ~ 20%. Our leverages separate, calculate calibrations with less degrada...

An evaluation of the chandy-misra-bryant algorithm for digital logic simulation. 26] Christian Sporrer and Herbert Bauer. Corolla partitioning for distributed logic simulation of vlsi-circuits. 19 Figure 14 summarizes the best speedups obtained using the conservative and optimistic protocols. Both the protocols yield relatively good speedups for the combinational circuits. The main reason for t...

Direct digital frequency synthesizer based on accumulators and phase registers, normally use fixed period clock signals. This results in synthesized signals having instantaneously varying time period. A technique of time period modification of the clock signal is proposed here to synthesized fixed period signal. The proposed technique is verified via simulation and hardware experiment. INTRODUC...

High Performance Continuous-time Filters for Information Transfer Systems. (August 2003) Ahmed Nader Mohieldin, B.Sc., Cairo University, Egypt; M.Sc., Cairo University, Egypt; Chairs of Advisory Committee: Dr. Edgar Sánchez-Sinencio Vast attention has been paid to active continuous-time filters over the years. The changes in technology have required new approaches. Thus as cheap, readily availa...

Frequency synthesizers find use in all high frequency applications such as communications, radar, digital communications, electronic imaging and spectroscopy [1]. There are three main techniques commonly used 1) PLL synthesizers based on a feedback mechanism to lock to a reference frequency. The popularity of the PLL is due to their extended tracking range and low cost. 2) Direct analog frequen...