Results 71 to 80 of about 459,320 (213)
Improved weighted least-squares phase unwrapping method for interferometric SAR processing
The Journal of Engineering, 2019 Based on the study of existed least-squares and weighted least-squares phase unwrapping methods, an improved weighted least-squares algorithm based on unwrapping phase error compensation is proposed.
Yu Hui +5 more
doaj +1 more source
Model of flicker noise effects on phase noise in oscillators
, 2003 Phase noise models that describe the near-carrier spectrum in an accurate but insightful way are needed, to better optimize the oscillator design. In this paper we present a model to describe the effect of flicker noise sources on the phase noise of an ...
CENTURELLI, Francesco +3 more
core +1 more source
Detection of multiplicative noise in stationary random processes using second- and higher order statistics [PDF]
, 2000 This paper addresses the problem of detecting the presence of colored multiplicative noise, when the information process can be modeled as a parametric ARMA process.
Coulon, Martial +2 more
core +1 more source
Simplified Laser Frequency Noise Measurement Using the Delayed Self-Heterodyne Method
PhotonicsHere, we report on a simplified laser frequency noise measurement technique employing an acousto-optic modulator, a delay line, and a real-time oscilloscope. The technique is a slight modification of the typical delayed heterodyne method.
Seán P. Ó Dúill, Liam P. Barry
doaj +1 more source
Phase Noise Compensation for Nonlinearity-Tolerant Digital Subcarrier Systems With High-Order QAM
IEEE Photonics Journal, 2017 The fundamental penalty of subcarrier modulation (SCM) with independent subcarrier phase noise processing is estimated. It is shown that the fundamental signal-to-noise ratio (SNR) penalty related to poorer phase noise tolerance of decreased baudrate ...
M. P. Yankov, L. Barletta, D. Zibar
doaj +1 more source
IEEE Photonics Journal, 2018 We propose a simplified digital phase noise compensation technique for a Nyquist pulse-shaped digital subcarrier multiplexed (DSCM) coherent optical transmission system, employing an optical frequency comb based on Quantum dot passive mode-locked laser ...
Govind Vedala +2 more
doaj +1 more source
IEEE Photonics Journal, 2019 We experimentally investigate the noise properties of a homemade 586 MHz mode-locked laser (MLL). The variation of the timing jitter versus the harmonic order is measured, which is consistent with the theoretical analyses.
Jiazheng Song +6 more
doaj +1 more source
Noise performance of frequency modulation Kelvin force microscopy
Beilstein Journal of Nanotechnology, 2014 Noise performance of a phase-locked loop (PLL) based frequency modulation Kelvin force microscope (FM-KFM) is assessed. Noise propagation is modeled step by step throughout the setup using both exact closed loop noise gains and an approximation known as “
Heinrich Diesinger +2 more
doaj +1 more source
, 2011 Bang-bang phase-locked loops (BBPLLs) are inherently nonlinear systems due to the binary phase detector (BPD). While they are typically used for clock and data recovery, the ongoing trend toward digital loop implementations has resulted in several ...
Tertinek, Stefan +3 more
core +1 more source
IET Radar, Sonar & NavigationThe authors deal with the problem of the design and manufacture of a high‐resolution FMCW radar for drone detection and classification. The difficulties of the problem are discrete clutter reduction and spurious phase noise mitigation.
Tran Vu Hop +2 more
doaj +1 more source