1. Bandwidth of a Transmission Channel:
Usually, the range of frequencies passed by the channel. This will often
consist of a single passband, but may
of several distinct (nonoverlapping) pass-bands. Each passband contributes to
the bandwidth of the channel a quantity equal to the difference between its
upper and lower frequency limits; the sum of all such differences gives the
In these cases bandwidth is measured in frequency units: hertz (Hz) or,
colloquially, cycles per second (cps). If the bandwidth is considered in a
transform domain other than frequency (such as sequency) then it is
measured in the appropriate units.
There are several loose classifications of frequency bandwidths employed for
convenience of description in various areas of technology; one classification is
narrowband (up to 300 Hz)
voiceband (300-3000 Hz)
wideband (over 3000 Hz)
See also band-limited channel.
See band matrix.