phase-shift keying carrier
51Null modem — Modem  Pour le MoDem, voir Mouvement démocrate (France). Le modem (mot valise, pour modulateur démodulateur), est un périphérique servant à communiquer avec des utilisateurs distants par l intermédiaire d une ligne téléphonique. Il permet… …
52Ultra-wideband — (aka UWB, ultra wide band, ultraband, etc.) is a radio technology that can be used at very low energy levels for short range high bandwidth communications by using a large portion of the radio spectrum. UWB has traditional applications in non… …
53Enhanced Data Rates for GSM Evolution — « EDGE » redirige ici. Pour les autres significations, voir Edge. Enhanced Data Rates for GSM Evolution (EDGE acronyme anglais de tranchant (d une lame)) est une norme de téléphonie mobile, une évolution du GPRS qui est une extension de …
54Pulse-amplitude modulation — Principle of PAM: (1) original signal, (2) PAM signal, (a) amplitude of signal, (b) time Pulse amplitude modulation, acronym PAM, is a form of signal modulation where the message information is encoded in the amplitude of a series of signal… …
55High-Speed Downlink Packet Access — (HSDPA) is an enhanced 3G (third generation) mobile telephony communications protocol in the High Speed Packet Access (HSPA) family, also dubbed 3.5G, 3G+ or turbo 3G, which allows networks based on Universal Mobile Telecommunications System… …
56Constellation diagram — A constellation diagram is a representation of a signal modulated by a digital modulation scheme such as quadrature amplitude modulation or phase shift keying. It displays the signal as a two dimensional scatter diagram in the complex plane at… …
57Wavelength-division multiplexing — For the radio station, see DWDM FM. Multiplex techniques Circuit mode (constant bandwidth) TDM · FDM · SDM Polarization multiplexing Spatial m …
58Node-to-node data transfer — In telecommunications, node to node data transfer is the movement of data from one node of a network to the next. In the OSI model it is handled by the lowest two layers, the data link layer and the physical layer. In most communication systems,… …
59Bluetooth — This article is about the electronic protocol. For the medieval King of Denmark, see Harald I of Denmark. Bluetooth logo Bluetooth is a proprietary open wireless technology standard for exchanging data over short distances (using short wavelength …
60ITU G.992.1 — In telecommunications, ITU G.992.1 (better known as G.DMT) is an ITU standard for ADSL using discrete multitone modulation. G.DMT full rate ADSL expands the usable bandwidth of existing copper telephone lines, delivering high speed data… …
