frequency shift keying
21Keying (telecommunications) — Keying is the shaping of a signal to convey information, known as modulation. Modulation can be used to represent a digital message as an analogue waveform. This is known as keying and several keying techniques exist (these include phase shift… …
22Very minimum-shift keying — VMSK, for Very Minimum Shift Keying modulation, is one of several digital modulation methods claimed to send high speed digital data through very low bandwidth (or narrowband) channels. A typical claim is a data rate of 6 Mbit/s in a bandwidth of …
23Frequency modulation — See also: Amplitude modulation In telecommunications, frequency modulation (FM) conveys information over a carrier wave by varying its frequency (contrast this with amplitude modulation, in which the amplitude of the carrier is varied while its… …
24Frequency-change signaling — In telecommunication, frequency change signaling is a telegraph signaling method in which one or more particular frequencies correspond to each desired signaling condition of a telegraph code. The transition from one set of frequencies to the… …
25Radio Frequency Identification — Die Neutralität dieses Artikels oder Abschnitts ist umstritten. Eine Begründung steht auf der Diskussionsseite. siehe: Abwahl Lesenswert Februar 2007 …
26Very low frequency — or VLF refers to radio frequencies (RF) in the range of 3 kHz to 30 kHz. Since there is not much bandwidth in this band of the radio spectrum, only the very simplest signals are used, such as for radio navigation. Also known as the myriameter… …
27On-Off Keying — Amplitudenumtastung (engl. Amplitude Shift Keying (ASK)) ist eine digitale Modulationsart. Dabei wird die Amplitude des Trägersignals verändert, um verschiedene Werte zu übertragen. Die einfachste Form der Amplitudentastung ist das sogenannte On… …
28High Frequency Internet Protocol — High Frequency Internet Protocolacronyms: HFIP or HF IP. Usually associated with Automatic Link Establishment and HF radio data communications. HFIP provides protocol layers enabling internet file transfer, chat, web, or email. HFIP commonly uses …
29Comb Interleaved Frequency Division Multiplex — OFDM Signal im Frequenzbereich. Die einzelnen Trägersignale sind in unterschiedlichen Farben dargestellt. OFDM Signalspektrum, die Summe der einzelnen Trägersignale OFDM (O …
30Orthogonal Frequency Division Multiplex — OFDM Signal im Frequenzbereich. Die einzelnen Trägersignale sind in unterschiedlichen Farben dargestellt. OFDM Signalspektrum, die Summe der einzelnen Trägersignale OFDM (O …
