Baseband transmission
In communications engineering , baseband transmission is understood to mean the transmission of a time signal in the frequency range which the time signal has as a frequency spectrum . This frequency spectrum is then also referred to as the baseband . In digital transmissions, line coding can influence the properties of the transmitted frequency spectrum in the baseband.
A baseband transmission has the following properties, among others:
- Little implementation effort.
- If necessary, a direct component is also transmitted. In the case of electrical transmission media, this means that there must be a direct galvanic coupling between the transmitter and receiver.
- Most transmission channels are not suitable for baseband transmission. In these cases, the baseband is shifted to other frequency ranges by means of certain modulation methods .
- Multiple use of the transmission medium can only take place with baseband transmission using time division multiplexing .
Application examples are the analog telephone connection or the Ethernet technology.
literature
- Rudolf Mäusl, Jürgen Göbel: Analog and digital modulation methods. Baseband and carrier modulation . Hüthig, Heidelberg 2002, ISBN 3-7785-2886-6 .