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data communications frequency

См. также в других словарях:

  • Next Generation Data Communications — Next Generation (NextGen) Data Communications, an element of the Next Generation Air Transportation System, will significantly reduce controller to pilot communications and controller workload, whilst improving safety[1]. Description In the… …   Wikipedia

  • MDC (Motorola Data Communications) — цифровой низкоскоростной протокол обмена. Передача данных в MDC осуществляется посредством частотной манипуляции сигнала аудиочастоты AFSK (audio frequency shift keying). MDC сигналлинг был разработан фирмой Motorola специально для использования… …   Википедия

  • Data transmission — Data transmission, digital transmission, or digital communications is the physical transfer of data (a digital bit stream) over a point to point or point to multipoint communication channel. Examples of such channels are copper wires, optical… …   Wikipedia

  • Frequency-division multiplexing — (FDM) is a form of signal multiplexing where multiple baseband signals are modulated on different frequency carrier waves and added together to create a composite signal. Non telephoneFDM can also be used to combine multiple signals before final… …   Wikipedia

  • frequency — UK US /ˈfriːkwənsi/ noun [C or U] ► the number of times something happens within a particular period, or the fact of something happening often or a large number of times: »Once a week is a good frequency to back up all the data. the frequency of… …   Financial and business terms

  • Frequency-shift keying — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

  • Communications-based train control — CBTC deployment in Metro de Madrid, Spain …   Wikipedia

  • Frequency-hopping spread spectrum — (FHSS) is a method of transmitting radio signals by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver. A spread spectrum transmission offers three main advantages over… …   Wikipedia

  • Communications of the ACM — Editor in Chief Moshe Y. Vardi Categories Computer Science Frequency monthly First issue 1957 Company Association for Computing Machinery …   Wikipedia

  • Data compression — Source coding redirects here. For the term in computer programming, see Source code. In computer science and information theory, data compression, source coding or bit rate reduction is the process of encoding information using fewer bits than… …   Wikipedia

  • Communications security — Not to be confused with Commonwealth Securities. Communications security is the discipline of preventing unauthorized interceptors from accessing telecommunications in an intelligible form, while still delivering content to the intended… …   Wikipedia

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