Results 91 to 100 of about 1,790,403 (266)
Sensors, 2018 In this paper, we propose a covert underwater acoustic communication method that is robust to fading using a chirp signal combined with a frequency-hopping spread spectrum scheme.
Geunhyeok Lee +4 more
doaj +1 more source
Integrated Photonic Modulator Circuit With Programmable Intensity and Phase Modulation Response
Laser &Photonics Reviews, EarlyView.A platform‐agnostic programmable modulation circuit is introduced to enable tunable and universal optimization of integrated photonic modulators. By flexibly controlling carrier amplitude and phase, the approach adapts to diverse device characteristics without structural redesign.
Hong Deng +3 more
wiley +1 more source
Comb‐Driven Coherent Optical Transmitter for Scalable DWDM Interconnects
Laser &Photonics Reviews, EarlyView.A comb‐driven coherent optical transmitter on a Si/SiN platform enables scalable DWDM interconnects by integrating ultra‐compact microring‐assisted modulators and interleavers. High‐baud coherent signaling achieves 400 Gb/s per wavelength and >$>$1 Tb/s multi‐channel transmission, with projected >$>$10 Tb/s per fiber, offering a path toward energy ...
Alireza Geravand +11 more
wiley +1 more source
Analyse des signaux multicomposante à modulation de fréquence linéaire par la transformation de Teager-Huang-Hough [PDF]
, 2014 A novel detection approach of linear FM (LFM) signals, with single or multiple components, in the time-frequency plane of Teager-Huang (TH) transform is presented.
BOUDRAA, Abdelouahab +4 more
core +1 more source
Laser &Photonics Reviews, EarlyView.Optical limiting in a nanomaterial‐polymer saturable absorber is harnessed as a functional intracavity degree of freedom, where pump‐controlled photothermal loss continuously reshapes the gain spectrum of rare‐earth ions, enabling non‐mechanical spectral engineering in an ultrafast fiber laser.
Maolin Dai +4 more
wiley +1 more source
ON THE APPLICABILITY OF THE PHASE SCANNING METHOD IN ANTENNA ARRAYS OF CHIRP PULSE RADARS
Radio Physics and Radio Astronomy, 2019 Purpose: Investigation of the space-and-time structure of the output signal of the antenna array (AA) of a chirp pulse radar in dependence on the frequency deviation range of the probe signal and analysis of the applicability condition for the phase ...
V. G. Galushko, D. M. Vavriv
doaj +1 more source
Efficient algorithm for estimating the parameters of a chirp signal
Journal of Multivariate Analysis, 2012 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ananya Lahiri, Debasis Kundu, Amit Mitra
openaire +3 more sources
Parallel Multi‐Target Detection for Quantum LiDAR
Laser &Photonics Reviews, EarlyView.Parallel multi‐target detection is achieved in quantum LiDAR with a single‐pixel quantum readout. Direction and distance information are extracted together, allowing multiple objects to be distinguished under noisy low‐light conditions and pointing to a new strategy for scan‐free quantum remote sensing.
Junyeop Kim +4 more
wiley +1 more source
, 2012 This thesis investigates all-optical signal processing using cascaded quadratic nonlinearities in periodically poled lithium niobate (PPLN) waveguides for telecommunication applications.
Liu, Sheng
core +1 more source
Time-frequency representation of multicomponent chirp signals
Signal Processing, 1997 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ma, Ning +3 more
openaire +3 more sources