Communication sans fil
Définition(s)
Définitions générales
| La transmission sans fil, désignation plus générale de la télégraphie sans fil, souvent abrégée par le sigle TSF, est un mode de communication à distance utilisant des ondes électromagnétiques modulées comme vecteur.Le sigle « TSF » date des débuts des transmissions radio ; il est complètement tombé en désuétude mais a longtemps été utilisé pour désigner : Les systèmes de téléphone et télégraphe sans fil ; Les émetteurs, les récepteurs ainsi que les programmes qui permettaient de recevoir les émissions diffusées par les ondes radio.Elle a été initialement assemblée et exploitée par Marconi, sur la base de travaux effectués par divers scientifiques : les ondes électromagnétiques ont d'abord été mises en évidence par Hertz après avoir été prédites par Maxwell ; Branly a découvert le principe de la radioconduction et conçu le radioconducteur à limaille, Popov l'antenne, Braun l'adaptation de l'impédance de l'antenne et les circuits sélectifs.La TSF a d'abord équipé des navires. |
Source : http://fr.dbpedia.org/resource/Transmission_sans_fil
Termes associés (Wikipedia)
| Wireless communication is the transfer of information or power between two or more points that are not connected by an electrical conductor. The most common wireless technologies use radio. With radio waves distances can be short, such as a few meters for television or as far as thousands or even millions of kilometers for deep-space radio communications. It encompasses various types of fixed, mobile, and portable applications, including two-way radios, cellular telephones, personal digital assistants (PDAs), and wireless networking. Other examples of applications of radio wireless technology include GPS units, garage door openers, wireless computer mice, keyboards and headsets, headphones, radio receivers, satellite television, broadcast television and cordless telephones. Somewhat less common methods of achieving wireless communications include the use of other electromagnetic wireless technologies, such as light, magnetic, or electric fields or the use of sound. The term wireless has been used twice in communications history, with slightly different meaning. It was initially used from about 1890 for the first radio transmitting and receiving technology, as in wireless telegraphy, until the new word radio replaced it around 1920. The term was revived in the 1980s and 1990s mainly to distinguish digital devices that communicate without wires, such as the examples listed in the previous paragraph, from those that require wires or cables. This is its primary usage in the 2000s. LTE, LTE-Advanced, Wi-Fi and Bluetooth are common modern wireless technologies used in the 2000s. Wireless operations permit services, such as long-range communications, that are impossible or impractical to implement with the use of wires. The term is commonly used in the telecommunications industry to refer to telecommunications systems (e.g. radio transmitters and receivers, remote controls, etc.) which use some form of energy (e.g. radio waves, acoustic energy,) to transfer information without the use of wires. Information is transferred in this manner over both short and long distances. |
Source : http://dbpedia.org/resource/Wireless
External references (Wikipedia)
| Reference |
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Sources
Wikidata : Q249
DBpedia FR : Transmission_sans_fil
DBpedia EN : Wireless
Autres langues (Wikipedia)
اتصال لاسلكي (arwiki)
Naqilsiz rabitə (azwiki)
Безжична комуникация (bgwiki)
वायरलेस (bhwiki)
Sense fil (cawiki)
Bezdrátová komunikace (cswiki)
Trådløs kommunikation (dawiki)
Kabellose Übertragungsverfahren (dewiki)
Ασύρματος (elwiki)
Wireless (enwiki)
Comunicación inalámbrica (eswiki)
مخابرات بیسیم (fawiki)
Langaton tekniikka (fiwiki)
Transmission sans fil (frwiki)
Sen fíos (glwiki)
תקשורת אלחוטית (hewiki)
बेतार (hiwiki)
Nirkabel (idwiki)
Þráðlaus samskipti (iswiki)
Wireless (itwiki)
無線通信 (jawiki)
უსადენო ტექნოლოგიები (kawiki)
ತಂತಿರಹಿತ (knwiki)
무선 통신 (kowiki)
Bezvadu sakari (lvwiki)
Antso (mgwiki)
Nirkabel (minwiki)
Безжична комуникација (mkwiki)
Утасгүй технологи (mnwiki)
बिनतारी (mrwiki)
Wayarles (mswiki)
Quemunicaçon sin filo (mwlwiki)
ကြိုးမဲ့ဆက်သွယ်ရေး (mywiki)
Comunicações sem fio (ptwiki)
Беспроводные технологии (ruwiki)
Wireless (simplewiki)
Bezdrôtová komunikácia (skwiki)
Brezžični prenos podatkov (slwiki)
Komunikimi pa tela (sqwiki)
கம்பியற்ற தகவல்தொடர்பு (tawiki)
การสื่อสารไร้สาย (thwiki)
Wireless (tlwiki)
Kablosuz iletişim (trwiki)
Бездротові технології (ukwiki)
لاسلکی (urwiki)
Wireless (vecwiki)
无线通讯 (wuuwiki)
ურსინე ტექნოლოგიეფი (xmfwiki)
無線通訊 (zhwiki)
