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time-varying channel

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  • Time diversity — is used in digital communication systems to combat that the transmissions channel may suffer from error bursts due to time varying channel conditions. The error bursts may be caused by fading in combination with a moving receiver, transmitter or… …   Wikipedia

  • Channel (communications) — Old telephone wires are a challenging communications channel for modern digital communications. In telecommunications and computer networking, a communication channel, or channel, refers either to a physical transmission medium such as a wire, or …   Wikipedia

  • Time in physics — In physics, the treatment of time is a central issue. It has been treated as a question of geometry. One can measure time and treat it as a geometrical dimension, such as length, and perform mathematical operations on it. It is a scalar quantity… …   Wikipedia

  • Clear Channel Communications — Not to be confused with clear channel radio stations, a type of AM radio station. This article is about the broadcasting company. For other uses, see Clear channel. CC Media Holdings, Inc. Type Private Industry …   Wikipedia

  • Concepts in the Wheel of Time series — This article is about the concepts and terminology in Robert Jordan s fantasy fiction series The Wheel of Time .One Power (True Source)Items of Power Angreal are items of the One Power which enable the user to draw more of the One Power than they …   Wikipedia

  • Spike (TV channel) — For other uses, see Spike. Spike Launched March 7, 1983 (as TNN) September 25, 2000 (as The New TNN) August 11, 2003 (as Spike) Owned by Network Enterprises, Inc. (a wholly owned subsidiary of MTV Networks, wholly owned by …   Wikipedia

  • Side-channel attack — In cryptography, a side channel attack is any attack based on information gained from the physical implementation of a cryptosystem, rather than brute force or theoretical weaknesses in the algorithms (compare cryptanalysis). For example, timing… …   Wikipedia

  • Coherence time (communications systems) — In communications systems, a communication channel may change with time. Coherence time is the time duration over which the channel impulse response is considered to be not varying. Such channel variation is much more significant in wireless… …   Wikipedia

  • Ion channel — Not to be confused with: Ion Television or Ion implantation. Schematic diagram of an ion channel. 1 channel domains (typically four per channel), 2 outer vestibule, 3 selectivity filter, 4 diameter of selectivity filter, 5 phosphorylation site, 6 …   Wikipedia

  • English Channel — an arm of the Atlantic between S England and N France, connected with the North Sea by the Strait of Dover. 350 mi. (565 km) long; 20 100 mi. (32 160 km) wide. * * * or the Channel French La Manche ( The Sleeve ) Strait between southern England… …   Universalium

  • Dimensionless Specific Energy Diagrams for Open Channel Flow — Contents 1 Energy Equations 2 Example 3 Choke Conditions 4 Dimensionless Diagram 5 References …   Wikipedia

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