Narrowband - traducción al español
Ex: The terms "narrow-band" and "wide-band" are ill-defined but they are usually taken to describe bandwidths below and above the telephone circuit bandwidth of 3500 Hz.
![An American FM radio transmitter in Buffalo, NY at [[WEDG]]](https://commons.wikimedia.org/wiki/Special:FilePath/FM Broadcast Transmitter High Power.jpg?width=200 "An American FM radio transmitter in Buffalo, NY at [[WEDG]]")
![static]], while the FM receiver clearly reproduced a music program from Armstrong's experimental FM transmitter [[W2XMN]] in New Jersey.](https://commons.wikimedia.org/wiki/Special:FilePath/GE FM radio antistatic demonstration 1940.jpg?width=200 "static]], while the FM receiver clearly reproduced a music program from Armstrong's experimental FM transmitter [[W2XMN]] in New Jersey.")
![Frequency spectrum and [[waterfall plot]] of a 146.52{{nbsp}}MHz carrier, frequency modulated by a 1,000{{nbsp}}Hz sinusoid. The modulation index has been adjusted to around 2.4, so the carrier frequency has small amplitude. Several strong sidebands are apparent; in principle an infinite number are produced in FM but the higher-order sidebands are of negligible magnitude.](https://commons.wikimedia.org/wiki/Special:FilePath/Waterfall FM.jpg?width=200 "Frequency spectrum and [[waterfall plot]] of a 146.52{{nbsp}}MHz carrier, frequency modulated by a 1,000{{nbsp}}Hz sinusoid. The modulation index has been adjusted to around 2.4, so the carrier frequency has small amplitude. Several strong sidebands are apparent; in principle an infinite number are produced in FM but the higher-order sidebands are of negligible magnitude.")
Definición
Wikipedia
Narrowband signals are signals that occupy a narrow range of frequencies or that have a small fractional bandwidth. In the audio spectrum, narrowband sounds are sounds that occupy a narrow range of frequencies. In telephony, narrowband is usually considered to cover frequencies 300–3400 Hz, i.e. the voiceband.
In radio communications, a narrowband channel is a channel in which the bandwidth of the message does not significantly exceed the channel's coherence bandwidth.
In the study of wired channels, narrowband implies that the channel under consideration is sufficiently narrow that its frequency response can be considered flat. The message bandwidth will therefore be less than the coherence bandwidth of the channel. That is, no channel has perfectly flat fading, but the analysis of many aspects of wireless systems is greatly simplified if flat fading can be assumed.
