This article describes an adaptive synthesis technique based on frequency (phase) modulation of arbitrary input signals. The background and motivation for the development of the technique, as well as related work, are discussed. A detailed description of delay line-based phase modulation of sinusoidal and complex signals is provided. The basic design of an implementation of the technique is pre...

We describe many issues with TCP over satellite performance in relation to two scenarios: hybrid and backbone. We examine what e ect having a backbone of 255ms (satellite link) has as opposed to having just a 70ms delay. We explore, through simulation, the e ect of Tahoe, Reno and SACK TCP on this performance, in the context not just of droptail queueing but also varying settings of the paramet...

This paper discusses the digital implementation of a simple moving target indicator (MTI) using LabVIEW. A single delay line canceller is chosen for study due to its simplicity in both concept and implementation. A modification is made to facilitate implementation in a common embedded systems environment, and an example LabVIEW program is developed for demonstration.

Miniature slow light devices based on the recently developed Surface Nanoscale Axial Photonics (SNAP) technological platform is reviewed. The theory and experimental demonstration of the SNAP bottle resonator dispersionless delay line and dispersion compensator are presented. Keywords— Nanophotonics, microresonators, microfibres

A model neuron with delay line feedback connections can learn a time series generated by another neuron. In the case that both neurons have identical transfer functions, a model neuron (student) is capable of reproducing the instruction sequence generated by another neuron (teacher), but the parameters are not uniquely determined by learning a quasi-periodic time series. A student that has comp...

A structural study has been performed on the polar ZnO(0001̄)-(1×1) surface using ab initio calculations and low-energy electron diffraction (LEED). The experiment was performed with a delay line detector LEED system to minimize electron damage of the surface. The top O-Zn interlayer spacing was found to be 0.51 ± 0.04 Å, a 16% ± 6% contraction from the bulk spacing. The second and third interla...

M U LT I P L E TI M E-S CA L ES Jui-Kuo Juan, John G. Harris and Jose C. Principe Computational Neuro-Engineering Laboratory University of Florida 453 NEB Bldg, Gainesville, FL 32611 Email: [email protected] ' introduce a new generalized feed-forward structure 1 hat provides for multiple time scales. The gamma, Laguerre and other locally recurrent feed-forward structures perform poorly in cas...

We present the enabling concept and technology for a dual spacecraft formation-flying optical interferometer, to be launched into a deep space orbit as Space Technology 3. The combiner spacecraft makes use of a nested cat’s eye delay line configuration that minimizes wavefront distortion and stores 20 m of optical pathlength in a package of ∼ 1.5 m length. A parabolic trajectory for the seconda...

An architecture for a time interpolation circuit with an rms error of 25 ps has been developed in a 0.7m CMOS technology. It is based on a delay locked loop (DLL) driven by a 160-MHz reference clock and a passive RC delay line controlled by an autocalibration circuit. Start-up calibration of the RC delay line is performed using code density tests (CDT). The very small temperature/voltage depend...

The problem of wide-angle astrometry via interferometry is to recover the two coordinates for each star from the observed delays. In the absence of atmospheric turbulence, the geometrical delay can be dened as: dG;ij(t) dj(t) di(t) = Bij(t) ŝ0 Cij . Here the geometrical delay is the di erence between the delay line lengths di and dj that is required to equalize the e ective optical paths from t...