Adjective
English Wikipedia has an article on:narrowbandWikipedia
narrowband (not comparable)
Describing communication systems with a smaller bandwidth than wideband.
2G technical characteristics 2G ALE Signal The more common 2G ALE signal waveform is designed to be compatible with standard 3 kHz SSB narrowband voice channel transceivers. Source: Internet
By contrast, in narrowband systems where the signal bandwidth is low, the received signal quality will be severely lowered if the jamming power happens to be concentrated on the signal bandwidth. Source: Internet
Channel equalization is simplified because OFDM may be viewed as using many slowly modulated narrowband signals rather than one rapidly modulated wideband signal. Source: Internet
A narrowband amp amplifies a specific narrow range of frequencies, to the exclusion of other frequencies. Source: Internet
In a narrowband system such as a radio communication system, unwanted outputs such as X-Y and 2X+Y will be remote from the wanted band and so be ignored by the system. Source: Internet
Frequency modulation can be classified as narrowband if the change in the carrier frequency is about the same as the signal frequency, or as wideband if the change in the carrier frequency is much higher (modulation index >1) than the signal frequency. Source: Internet