Low pass signal and bandpass signal

1. What is low-pass signal and bandpass signal?
2. What is low-pass signal?
3. What is bandpass signal?
4. What is the difference between low-pass channel and band pass channel?

What is low-pass signal and bandpass signal?

Definition: Bandpass Signal (cont.)

Bandpass signals are encountered when receiving radio frequency (RF) signals such as communication and radar signals. In the analysis and actual processing of BP signals it is convenient to work with a related, equivalent signal called the Equivalent Lowpass Signal.

What is low-pass signal?

A low-pass filter (LPF) is a circuit that only passes signals below its cutoff frequency while attenuating all signals above it. It is the complement of a high-pass filter, which only passes signals above its cutoff frequency and attenuates all signals below it.

What is bandpass signal?

A bandpass signal is a signal containing a band of frequencies not adjacent to zero frequency, such as a signal that comes out of a bandpass filter.

What is the difference between low-pass channel and band pass channel?

A speech channel is often referred to as a lowpass channel, although it does not necessarily extend down to DC. More commonly it is called a baseband channel. A bandpass channel by definition should have a bandwidth covering a range of frequencies not including DC.