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space-time modulation

См. также в других словарях:

  • Space-time block coding based transmit diversity — (STTD) is a method of transmit diversity used in UMTS third generation cellular systems. STTD is optional in the UTRAN air interface but mandatory for user equipment (UE). STTD utilizes space time block code (STBC) in order to exploit redundancy… …   Wikipedia

  • Space–time block code — This article deals with coherent space–time block codes (STBCs). For differential space–time block codes, see differential space–time codes.Space–time block coding is a technique used in wireless communications to transmit multiple copies of a… …   Wikipedia

  • Modulation space — Modulation spaces[1] are a family of Banach spaces defined by the behavior of the short time Fourier transform with respect to a test function from the Schwartz space. They were originally proposed by Hans Georg Feichtinger and are recognized to… …   Wikipedia

  • Time-frequency analysis — is a body of techniques for characterizing and manipulating signals whose component frequencies vary in time, such as transient signals.Whereas the technique of the Fourier transform can be used to obtain the frequency spectrum of a signal whose… …   Wikipedia

  • Modulation — For musical change of key, see Modulation (music). For other uses, see Modulation (disambiguation). Passband modulation v · d · e …   Wikipedia

  • Modulation (music) — Key change example: C major to C minor. In music, modulation is most commonly the act or process of changing from one key (tonic, or tonal center) to another. This may or may not be accompanied by a change in key signature. Modulations articulate …   Wikipedia

  • Time Division Multiple Access — Multiplexverfahren (lat. multiplex „vielfach, vielfältig“) sind Methoden zur Signal und Nachrichtenübertragung, bei denen mehrere Signale zusammengefasst (gebündelt) und simultan über ein Medium (Leitung, Kabel oder Funkstrecke) übertragen werden …   Deutsch Wikipedia

  • Modulation sphere — The Modulation sphere or M space formulation is a scheme or theory representing the system of effects of phase modulation and amplitude modulation as applied together on a carrier wave. The relations between both modulations on the carrier are… …   Wikipedia

  • Pulse-code modulation — PCM redirects here. For other uses, see PCM (disambiguation). Pulse code modulation (PCM) is a method used to digitally represent sampled analog signals. It is the standard form for digital audio in computers and various Blu ray, Compact Disc and …   Wikipedia

  • Delta-sigma modulation — Delta sigma (ΔΣ; or sigma delta, ΣΔ) modulation is a method for encoding high resolution or analog signals into lower resolution digital signals. The conversion is done using error feedback, where the difference between the two signals is… …   Wikipedia

  • Marshall Space Flight Center — George C. Marshall Space Flight Center Aerial view of the test area at MSFC …   Wikipedia

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