In communications, wideband is a relative term used to describe a wide range of frequencies in a spectrum. A system is typically described as wideband if the message bandwidth significantly exceeds the channel's coherence bandwidth.
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- In communications, wideband is a relative term used to describe a wide range of frequencies in a spectrum. A system is typically described as wideband if the message bandwidth significantly exceeds the channel's coherence bandwidth. Some communication links have such a high data rate that they are forced to use a wide bandwidth; other links may have relatively low data rates, but deliberately use a wider bandwidth than "necessary" for that data rate in order to gain other advantages; see spread spectrum. A wideband antenna is one with approximately or exactly the same operating characteristics over a very wide passband. It is distinguished from broadband antennas, where the passband is large, but the gain and/or pattern need not stay the same over the passband. The term Wideband Audio or (also termed HD Voice or Wideband Voice) denotes a telephone conversation using a wideband codec, which uses a greater frequency range of the audio spectrum than conventional voiceband telephone calls, resulting in a clearer sound. According to the United States Patent and Trademark Office, WIDEBAND is a registered trademark of WideBand Corporation, a USA based manufacturer of Gigabit Ethernet managed switches, adapters, and networking equipment. In some contexts wideband is distinguished from broadband in being broader.
- Радиосигналы, ширина спектра которых сравнима с центральной частотой. Иногда используется коэффициент 1/10, т. е. если ширина спектра составляет около 1/10 от частоты, на которой передается сигнал, то сигнал считается широкополосным. При более узком спектре сигнал будет узкополосным, при более широком - сверхширокополосным. Дискретные частотные сигналы, ДС Фазоманипулированные сигналы, ФМ Частотно-модулированные сигналы, ЧМС Метод расширения спектра методом прямой последовательности (DSSS — Direct Sequence Spread Spectrum) FSSS UWB Сверхширокополосные сигналы
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- In communications, wideband is a relative term used to describe a wide range of frequencies in a spectrum. A system is typically described as wideband if the message bandwidth significantly exceeds the channel's coherence bandwidth.
- Радиосигналы, ширина спектра которых сравнима с центральной частотой. Иногда используется коэффициент 1/10, т. е. если ширина спектра составляет около 1/10 от частоты, на которой передается сигнал, то сигнал считается широкополосным. При более узком спектре сигнал будет узкополосным, при более широком - сверхширокополосным.
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- Wideband
- Широкополосные сигналы
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