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1 carrier
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2 optical
12 -
3 digital
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
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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