Publication
Systèmes de communications à Ultra Large Bande
Pierre-André Farine, Cyril Botteron, Christian Robert, Frédéric Chastellain, Uroschanit Yodprasit, Paul Saad
2007
Poster talk
2007
Poster talk
Abstract
Selon les normes de la FCC (Federal communications commision), un signal est considéré comme Ultra Large Bande (ULB) si la largeur de bande occupée est d’au moins 500 MHZ ou si la valeur de la bande relative est supérieure à 0.2. Par ailleurs, une communication à ULB est permise uniquement si les densités spectrales sont respectés durant l'émission.
Official source
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Ontological neighbourhood
Related concepts (6)
Emissions trading
Emissions trading is a market-based approach to controlling pollution by providing economic incentives for reducing the emissions of pollutants. The concept is also known as cap and trade (CAT) or emissions trading scheme (ETS). Carbon emission trading for and other greenhouse gases has been introduced in China, the European Union and other countries as a key tool for climate change mitigation. Other schemes include sulfur dioxide and other pollutants.
Greenhouse gas emissions
Greenhouse gas emissions (abbreviated as GHG emissions) from human activities strengthen the greenhouse effect, contributing to climate change. Carbon dioxide (), from burning fossil fuels such as coal, oil, and natural gas, is one of the most important factors in causing climate change. The largest emitters are China followed by the US, although the United States has higher emissions per capita. The main producers fueling the emissions globally are large oil and gas companies.
Emission intensity
Life-cycle greenhouse gas emissions of energy sources An emission intensity (also carbon intensity or C.I.) is the emission rate of a given pollutant relative to the intensity of a specific activity, or an industrial production process; for example grams of carbon dioxide released per megajoule of energy produced, or the ratio of greenhouse gas emissions produced to gross domestic product (GDP).
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