Results 21 to 30 of about 3,274,533 (303)
Coherent scatterers detection in glacier environments by means of TerraSAR-X images [PDF]
, 2010 This paper investigates the detection of Coherent Scatterers (CSs) in Ice and Glacier terrain by means of Ter-raSAR-X images in the test case of the Helheim Glacier in Greenland.
Papathanassiou, Konstantinos P. +2 more
core +1 more source
IEEE Photonics Journal, 2017 We demonstrate an ultra-dense wavelength-division-multiplexing (UDWDM) passive optical network (PON) in a spatial-division-multiplexing system utilizing our home-made seven-core multicore fiber (MCF) with a self-homodyne coherent detection (SHCD) scheme.
Chunxiao Xiong +9 more
doaj +1 more source
Advanced DSP for Coherent Optical Fiber Communication
Applied Sciences, 2019 In this paper, we provide an overview of recent progress on advanced digital signal processing (DSP) techniques for high-capacity long-haul coherent optical fiber transmission systems.
Jian Zhao, Yaping Liu, Tianhua Xu
doaj +1 more source
A New Coherent Similarity Measure for Temporal Multichannel Scene Characterization [PDF]
, 2012 International audienceThis paper proposes a new method for a measure of coherent similarity between temporal multichannel synthetic aperture radar (SAR) images and its implementation to change detection application.
Ferro-Famil, Laurent +3 more
core +1 more source
Journal of Marine Science and Engineering, 2023 Detection of underwater coherent interference is necessary as its presence affects the estimation of the desired target. In this work, a method based on high-order particle velocity gradient polarization characteristics is proposed to distinguish the ...
Di Wu, Lanyue Zhang, Jia Wang, Xueru Hu
doaj +1 more source
A self-coherent receiver for detection of
PolMUX coherent signals
Optics Express, 2012 A self-coherent receiver capable of demultiplexing PolMUX-signals without an external polarization controller is presented. Training sequences are introduced to estimate the polarization rotation, and a decision feedback recursive algorithm mitigates the random walk of the recovered field.
Li, Jingshi +10 more
openaire +4 more sources
High sensitivity optical coherence detector optimization [PDF]
, 2001 An optimal optical filtering scheme for an optical coherence detection system gives very high detection sensitivities (-30dB) for a partially coherent source.
Coutinho, R.C. +7 more
core +1 more source
Multiple-Symbol Differential Sphere Detection Aided Differential Space-Time Block Codes Using QAM Constellations [PDF]
, 2011 We propose Multiple-Symbol Differential Detection (MSDD) aided Differential Space-Time Block Codes (DSTBCs) using QAM. Our solution eliminates the requirement of high-complexity MIMO channel estimation and its pilot overhead, while mitigating the ...
Wang, Li +3 more
core +2 more sources
Performance Analysis of Coherent and Noncoherent Modulation Under I/Q Imbalance Effects
IEEE Access, 2021 In this paper, we investigate the effects of in-phase/quadrature-phase imbalance (IQI) on the performance of different modulation schemes under multipath fading channels.
Bassant Selim +6 more
doaj +1 more source
Detection of coherence-disrupting and coherence-conferring alterations in text [PDF]
Memory & Cognition, 1985 In a study phase, subjects were presented with sentence pairs which were either coherent or anomalous. In a subsequent recognition test, each sentence pair was presented either in its original form or with one word changed. The changed word either disrupted the coherence of a previously coherent sentence pair or conferred coherence on a previously ...
J J, Bharucha, K L, Olney, P P, Schnurr
openaire +2 more sources