A baseband channel or lowpass channel (or system, or network) is a communication channel that can transfer frequencies that are very near zero.
What is baseband in simple terms?
base·band. : the band of frequencies that carries information in electronic communications and usually modulates a carrier signal.
What is difference between baseband and broadband?
Baseband transmission is a data transmission technique in which one signal needs the whole bandwidth of the channel to transfer the data. In contrast, broadband transmission is a transmission technology in which many signals with different frequencies send data across a single channel at the same time.