Editing Signal modulation (section)

===Digital baseband modulation===
Digital baseband modulation changes the characteristics of a baseband signal, i.e., one without a carrier at a higher frequency.

This can be used as equivalent signal to be later [[Frequency mixer|frequency-converted]] to a carrier frequency, or for direct communication in baseband. The latter methods both involve relatively simple [[line code]]s, as often used in local buses, and complicated baseband signalling schemes such as used in [[DSL]].