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high-index modulation

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  • High Speed Downlink Packet Access — (HSDPA, 3.5G, 3G+ oder UMTS Broadband) ist ein Datenübertragungsverfahren des Mobilfunkstandards UMTS, das vom 3rd Generation Partnership Project definiert wurde. Das Verfahren ermöglicht DSL ähnliche Datenübertragungsraten im Mobilfunknetz.… …   Deutsch Wikipedia

  • High Speed Packet Access — (HSPA) is a collection of mobile telephony protocols that extend and improve the performance of existing UMTS protocols. Two standards, HSDPA and HSUPA, have been established and a further standard, HSPA+, is soon to be released. Overview The two …   Wikipedia

  • High-definition television — Logo High definition television (HDTV) is video that has resolution substantially higher than that of traditional television systems (standard definition television). HDTV has one or two million pixels per frame, roughly five times that of SD… …   Wikipedia

  • High-definition television in the United States — The FCC has notified U.S. television broadcasters that the standard for transmitting TV over the air shall change from analog to digital. While there are many technical, political, and economic reasons for and implications of this change, the end …   Wikipedia

  • High-Functioning Autism — Klassifikation nach ICD 10 F84.0 Autismus, Frühkindlicher Autismus, Infantiler Autismus, Kanner Syndrom …   Deutsch Wikipedia

  • Amplitude modulation — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

  • Frequency 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… …   Wikipedia

  • Reuven Ramaty High Energy Solar Spectroscopic Imager — (RHESSI, or more rarely Explorer 81) is the sixth mission in the line of NASA Small Explorer missions (also known as SMEX). Launched on 5 February 2002, its primary mission is to explore the basic physics of particle acceleration and explosive… …   Wikipedia

  • Refractive index — Refraction of light at the interface between two media. In optics the refractive index or index of refraction of a substance or medium is a measure of the speed of light in that medium. It is expressed as a ratio of the speed of light in vacuum… …   Wikipedia

  • Speech transmission index — Speech Transmission Index, short STI is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science. The STI measures some physical characteristics of a transmission channel (a room, electro… …   Wikipedia

  • Negative index metamaterials — A negative index metamaterial causes light to refract, or bend, differently than in more common positive refractive index materials. Negative index metamaterials or negative index materials (NIM) are artificial structures where the refractive… …   Wikipedia

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