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Symmetric quadrature rules for simplexes based on sphere close packed lattice arrangements
Quadrature Integration Symmetric Triangle
2015/7/3
There have been significant efforts to identify high-order quadrature rules on d-simplex and d-hypercube geometries as evidenced by the surveys in [1–5]. On thed-hypercube, it is well-known that optim...
Bit-error Rate Performance of Nyquist Wavelength-Division Multiplexed Quadrature Phase-Shift Keying Optical Signals
Coherent communications Multiplexing Optical communications
2015/5/20
We measure bit-error rates of polarization-multiplexed Nyquist-WDM QPSK signals,which have rectangular spectral shapes and channel spacing equal to the symbol rate. The spectral efficiency of 4 bit/s/...
Filtering Tolerance of 108-Gb/s PolMux Quadrature Duobinary Signal on 25-GHz Grid
Filtering Tolerance PolMux Quadrature Duobinary Signa
2015/5/20
We demonstrate the error-free transmission of 108-Gb/s PolMux quadrature duobinary signal in a 25-GHz spaced WDM system and investigate its tolerance to narrow optical filtering.
Critical flow speeds of pipes conveying fluid using the generalized differential quadrature method
GDQ method stability flutter
2010/9/26
The aim of this study is to clarify the discrepancy regarding the critical flow speed of straight pipes conveying fluids that appears to be present in the literature by using the Generalized Different...
Quadrature Duobinary Modulation for 100G Transmission Beyond the Nyquist Limit
Fiber optics communications Coherent communications
2015/6/8
Quadrature duobinary (QDB) modulation with coherent detection is proposed for 112-Gb/s transmission systems. With proper system design for maximum spectral efficiency, we show that dual polarization Q...
Current-Mode Third-Order Quadrature Oscillator Using CDTAs
Current-Mode Third-Order Quadrature Oscillator CDTAs
2010/12/3
This paper describes a current-mode third-order quadrature oscillator based on current differencing transconductance amplifiers (CDTAs). Outputs of two current-mode sinusoids with 90° phase difference...
Electronically Tunable Dual-Input Integrator Employing a Single CDBA and a Multiplier: Voltage Controlled Quadrature Oscillator Design
Dual-Input Integrator a Single CDBA a Multiplier Quadrature Oscillator Design
2010/12/3
A new dual-input differential input active integrator using a current differencing buffered amplifier (CDBA) is proposed. A multiplier element is appropriately used in the circuit whose control voltag...
High Spectral Efficiency Phase and Quadrature Amplitude Modulation for Optical Fiber Transmission–Configurations, Trends, and Reach
High Spectral Efficiency Phase Quadrature Amplitude Modulation Optical Fiber Transmission–Configurations
2015/7/16
Catering to the current interest in high-order modulation formats, this paper discusses possible transmitter configurations and receiver concepts. Moreover, the major trends in system performance are ...
DDCC-Based Quadrature Oscillator with Grounded Capacitors and Resistors
DDCC-Based Quadrature Oscillator Grounded Capacitors and Resistors
2010/12/3
A new voltage-mode quadrature oscillator using two differential difference current conveyors (DDCCs), two grounded capacitors, and three grounded resistors is presented. The proposed oscillator provid...
CDBA-Based Universal Biquad Filter and Quadrature Oscillator
CDBA-Based Universal Biquad Filter Quadrature Oscillator
2010/12/6
The voltage-mode universal biquadratic filter and sinusoidal quadrature oscillator based on the use of current differencing buffered amplifiers (CDBAs) as active components have been proposed in this ...
Characterization of Programmable Phase Modulator with Polarization Quadrature Interferometer
PPM MCAO PAL_SLM
2011/4/20
The purpose of this master project is to characterize the Programmable Phase Modulator (PPM) made by Hamamatsu Photonics and use it as a deformable mirror to test the principles of Multi-Conjugate Ada...
Polarization Quadrature Interferometer
Mach-Zehnder interferometer setup spatial resolution of the detector LLNL PPM
2011/4/20
This memo describes a Mach-Zehnder interferometer setup that will measure the phase of an optic to the spatial resolution of the detector, using a polarization based quadrature detection technique. Th...
Electronically Tunable Quadrature Oscillator Using Translinear Conveyors and Grounded Capacitors
Translinear-C oscillators Current-controlled conveyors
2010/12/7
A new electronically tunable current-mode sinusoidal oscillator with three quadrature outputs is presented. The proposed circuit employs three translinear conveyors and two grounded capacitors to real...
A Tunable Quadrature Oscillator with Only Transconductance Elements and Grounded Capacitors
Active networks Transconductance element gm-C oscillators
2010/12/7
A novel quadrature oscillator is realised with only transconductance elements (TEs) and grounded capacitors. The realised quadrature oscillator uses only two inverting and two non-inverting transcondu...
Dual reciprocity BEM applied to transient elastodynamic problems with differential quadrature method in time
Elastodynamics Dual reciprocity BEM Differential quadrature method Time-stepping integration Lyapunov matrix equation
2010/10/22
This paper is concerned with numerical analysis of the transient elastodynamic problems by the dual reciprocity BEM (DRBEM) in space combined with the di€erential quadrature method (DQM) in time....