Results 61 to 70 of about 1,790,403 (266)
Chirp-Compensated DBR Lasers for TWDM-PON Applications
IEEE Photonics Journal, 2015 We propose a novel chirp compensation scheme for directly modulated three-section distributed Bragg reflector (3s-DBR) lasers in applications of the time- and wavelength-division multiplexed passive optical network systems.
Hang Zhao +5 more
doaj +1 more source
Advanced Electronic Materials, EarlyView.The impact of Cu microstructure on the thermomechanical residual stress of TSVs with a diameter of 3 μm$\umu{\rm m}$ is investigated by comparing Raman stress imaging and EBSD grain characterization. By correlating Raman‐imaged TSV stress with Cu grain structure, direct experimental evidence is provided to highlight the direct correlation between ...
Shuhang Lyu, Thomas Beechem, Tiwei Wei
wiley +1 more source
A TOPSAR Processing Algorithm Based on Extended Chirp Scaling: Evaluation with TerraSAR-X Data [PDF]
, 2008 This paper presents an efficient phase preserving processor for the TOPS (Terrain Observation by Progressive Scans) imaging mode. TOPS has been proposed as a new wide swath imaging mode, which solves the problems of scalloping and azimuth-varying ...
Meta, Adriano +5 more
core
Australian Journal of Social Issues, EarlyView.ABSTRACT Social inequity is increasing in Australia, often manifesting in entrenched locational disadvantage that requires place‐based responses grounded in local strengths, knowledge and participation. While community music programmes have demonstrated a range of positive social outcomes, their potential contribution to place‐based efforts addressing ...
Brydie‐Leigh Bartleet +6 more
wiley +1 more source
Optimal Particle Filters for Tracking a Time- Varying Harmonic or Chirp Signal
, 2008 We consider the problem of tracking the time-varying (TV) parameters of a harmonic or chirp signal using particle filtering (PF) tools. Similar to previous PF approaches to TV spectral analysis, we assume that the model parameters (complex amplitude ...
Swami, Ananthram, +2 more
core +1 more source
PhotonicsThis paper proposes a distributed vibration sensing system based on dual-chirped pulses and weak fiber Bragg gratings. Compared with conventional dual-pulse heterodyne detection techniques, the proposed approach utilizes the time-frequency ...
Huanyu Pu +3 more
doaj +1 more source
Archaeological Prospection, EarlyView.ABSTRACT This document is a report on the field application of non‐invasive geophysical and robotic prospecting methods at the submerged Neolithic site of La Marmotta (Lake Bracciano, Italy), within the LAHKE (LAke Heritage Knowledge and Exploration) project; the study focuses on the practical validation, adaptation and transfer of existing ...
dell' Erba Ramiro +4 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.A unimolecular polyampholytic graft copolymer matrix provides a protective confinement for an electrostatically embedded tetrapyridophenazine‐bridged heterodinuclear Ru‐Pt hydrogen evolving photocatalyst. The matrix slows the degradation kinetics of the catalyst and at the same time does not hinder its repair by ammonium persulfate.
Yurii Utievskyi +10 more
wiley +1 more source
Chirp parameter estimation from a sample covariance matrix
, 2001 This paper considers the problem of estimating the bandwidth and the center frequency of a linear chirp signal. The nonstationarity property of chirp signals implies that the signal has high rank and reduces the applicability of subspace-based algorithms
Volcker, B., Ottersten, Björn,
core +1 more source
International Journal of Circuit Theory and Applications, EarlyView.A co‐designed implicit‐reset phase‐frequency detector (PFD) and nonlinear amplifier‐assisted charge pump (CP) achieve dead zone‐free operation from 10 MHz to 4.7 GHz with < 0.5% current mismatch without calibration, enabling −80 dBc of reference spur and 0.50 ps of RMS jitter in a 180 nm of CMOS PLL.
A. Ghaemnia +3 more
wiley +1 more source