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guardband

A security frequency band, guardband, is an unused frequency band that lies between two adjacent transmission frequency bands or, in mobile radio networks, between the transmission frequencies for the uplink and downlink

. A guard frequency band is typically used in systems that use Frequency Division Multiple Access (FDMA) and avoids interference between adjacent channels

.

Frequency division multiplexing with subcarrier bands separated by

Frequency division multiplexing with subcarrier bands separated by

guardbands Guardbands are used in radio-based broadband systems such as Wireless Regional Area Networks (WRAN), but also in mobile radio systems such as GSM or DECT and in wireless networks such as Bluetooth

. Inaddition to channel separation, the guardband prevents mutual interference.

Due to the constant demand for additional frequency bands and the restrictions imposed by the frequency usage plan, unused security frequency bands, known as white spaces, are also used for mobile communications, among other things.

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Englisch: guardband
Updated at: 26.02.2018
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Translations: DE