Signal mixing involves combining two or more signals to produce a new signal, often used in communication systems to transmit information efficiently. This process can introduce both desired and undesired effects, such as interference or modulation, which are crucial to consider in signal processing applications.
Sidebands are the bands of frequencies that appear on either side of a carrier wave when it is modulated by a signal. They are crucial in communication systems as they carry the actual information being transmitted, while the carrier serves primarily as a means to transport this information over distances.