What Does Baseband Mean?
The word baseband has slightly different meanings or usage depending on the context, but traditionally, it is a signal at a very narrow frequency range on which data or information is superimposed and then transmitted. It is also called a lowpass signal since it can include near-zero frequencies. In this sense, a sound waveform is considered as a baseband while radio signals often rated in the megahertz levels are not considered baseband.
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Techopedia Explains Baseband
Baseband has various uses in the technology industry. Depending on the context, it takes on slightly different meanings, with the commonality of it being a signal.
- Baseband channel – is a communications channel that is able to transfer or transmit frequencies that are near zero. For example, Ethernet LANs and serial cables.
- Digital baseband transmission – this pertains to using the baseband channel, described above, to transfer a stream of bits over an unfiltered wire.
- Baseband bandwidth – equal to the highest frequency of a system, it is the upper bound frequency limit such as that of a lowpass filter.
- Baseband signal – includes near-zero frequencies where other information containing higher frequencies are superimposed and then sent to smaller subbands.
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