scholarly journals Signal-to-noise ratio in direct-detection mid-infrared Random-Modulation Continuous-Wave lidar in the presence of colored additive noise

2001 ◽  
Vol 9 (8) ◽  
pp. 389 ◽  
Author(s):  
Adam Rybaltowski ◽  
Allen Taflove
Keyword(s):  
Additive Noise ◽  
Continuous Wave ◽  
Direct Detection ◽  
Signal To Noise Ratio ◽  
Signal To Noise ◽  
Mid Infrared ◽  
Random Modulation ◽  
Noise Ratio

Internally Modulated Chirped Pulse Based Direct Detection Type φ-OTDR System with High Signal-to-Noise Ratio and Low Cost

2019 ◽  
Vol 46 (8) ◽  
pp. 0806003
Author(s):  
李鲁川 Luchuan Li ◽  
卢斌 Bin Lu ◽  
王校 Xiao Wang ◽  
梁嘉靖 Jiajing Liang ◽  
郑汉荣 Hanrong Zheng ◽  
...  
Keyword(s):  
Direct Detection ◽  
Signal To Noise Ratio ◽  
Low Cost ◽  
High Signal ◽  
Signal To Noise ◽  
Chirped Pulse ◽  
Noise Ratio

Telecom technology based continuous wave terahertz photomixing system with 105 decibel signal-to-noise ratio and 35 terahertz bandwidth

2013 ◽  
Vol 38 (20) ◽  
pp. 4197 ◽  
Author(s):  
Thorsten Göbel ◽  
Dennis Stanze ◽  
Björn Globisch ◽  
Roman J. B. Dietz ◽  
Helmut Roehle ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Signal To Noise Ratio ◽  
Signal To Noise ◽  
Noise Ratio

scholarly journals High Signal-to-Noise Ratio Mid-Infrared Quasar Spectral Templates

2013 ◽  
Vol 9 (S304) ◽  
pp. 315-318
Author(s):  
Allison R. Hill ◽  
S. C. Gallagher ◽  
R. P. Deo ◽  
E. Peeters ◽  
Gordon T. Richards
Keyword(s):  
Star Formation ◽  
Signal To Noise Ratio ◽  
Host Galaxy ◽  
High Signal ◽  
Host Galaxies ◽  
Signal To Noise ◽  
Mid Infrared ◽  
High Ionization ◽  
Noise Ratio ◽  
Luminous Objects

AbstractMid-infrared (MIR) quasar spectra exhibit a suite of emission features including high ionization coronal lines from the narrow line region (NLR) illuminated by the ionizing continuum, and hot dust features from grains, as well as polycyclic aromatic hydrocarbons (PAH) features from star formation in the host galaxy. Few features are detected in most spectra because of typically low signal-to-noise ratio (S/N) data. By generating spectral composites in three different luminosity bins from over 180 Spitzer Ifnfrared Spectrograph (IRS) observations, we boost the S/N and reveal important features in the complex spectra. We detect high-ionization, forbidden emission lines in all templates, PAH features in all but the most luminous objects, and broad silicate and graphite features in emission whose strength increases relative to the continuum with luminosity. We find that the intrinsic quasar spectrum for all luminosity templates is consistent, and the differences in the spectra can be explained by host galaxy contamination in the lower luminosity templates. We also posit that star formation may be active in most quasar host galaxies, but the spectral features of star formation are only detectable if the quasar is faint.

scholarly journals Theory and Measurement of Signal-to-Noise Ratio in Continuous-Wave Noise Radar

Sensors ◽  
2018 ◽  
Vol 18 (5) ◽  
pp. 1445 ◽  
Author(s):  
Bronisław Stec ◽  
Waldemar Susek
Keyword(s):  
Continuous Wave ◽  
Signal To Noise Ratio ◽  
Signal To Noise ◽  
Noise Radar ◽  
Noise Ratio

scholarly journals Silicon Photomultipliers Signal-to-Noise Ratio in the Continuous Wave Regime

2014 ◽  
Vol 20 (6) ◽  
pp. 284-290 ◽  
Author(s):  
Gabriele Adamo ◽  
Antonino Parisi ◽  
Salvatore Stivala ◽  
Alessandro Tomasino ◽  
Diego Agro ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Signal To Noise Ratio ◽  
Signal To Noise ◽  
Silicon Photomultipliers ◽  
Wave Regime ◽  
Noise Ratio
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