phase-shift keying carrier
31Módem — Para otros usos de este término, véase Modem (desambiguación). Un módem (Modulador Demodulador) es un dispositivo que sirve para enviar una señal llamada moduladora mediante otra señal llamada portadora. Se han usado módems desde los años 60,… …
32Single-sideband modulation — (SSB) is a refinement of amplitude modulation that more efficiently uses electrical power and bandwidth. It is closely related to vestigial sideband modulation (VSB) (see below).Amplitude modulation produces a modulated output signal that has… …
33Differential coding — In digital communications, differential coding is a technique used to provide unambiguous signal reception when using some types of modulation. It makes data to be transmitted to depend not only on the current bit (or symbol), but also on the… …
34Modulation (Technik) — Die Modulation (von lat. modulatio = Takt, Rhythmus) beschreibt in der Nachrichtentechnik einen Vorgang, bei dem ein zu übertragendes Nutzsignal (beispielsweise Musik, Sprache, Daten) eine sogenannte Trägerwelle verändert (moduliert). Dadurch… …
35Enhanced Data Rates for GSM Evolution — Enhanced Data rates for Global Evolution (EDGE), Enhanced GPRS (EGPRS), or IMT Single Carrier (IMT SC) is a backwards compatible digital mobile phone technology that allows improved data transmission rates, as an extension on top of standard GSM …
36Terrestrial Trunked Radio — TETRA redirects here. For other uses, see Tetra (disambiguation) TErrestrial Trunked RAdio [ETSI EN 300 392 2 v3.2.1] (TETRA) (formerly known as Trans European Trunked RAdio ) is a specialist Professional Mobile Radio [http://www.tetra… …
37Two-way radio — receiver which only receives content. Two way radios are available in mobile, stationary base and hand held portable configurations. Hand held radios are often called walkie talkies or handie talkies. A push to talk or Press To Transmit button is …
38List of amateur radio modes — The following is a list of the modes of communication used by amateur radio operators. Analog*Amplitude Modulation (AM) *Double Sideband Suppressed Carrier (DSB SC) *Independent Sideband (ISB) *Single Sideband (SSB) *Amplitude Modulation… …
39Optical hybrid — A 90° optical hybrid is a six port device that is used for coherent signal demodulation for either homodyne or heterodyne detection. It would mix the incoming signal with the four quadratural states associated with the reference signal in the… …
40ZigBee — module. The €1 coin, shown for size reference, is about 23 mm (0.9 inch) in diameter. ZigBee is a specification for a suite of high level communication protocols using small, low power digital radios based on an IEEE 802 standard for personal… …
