👉 In signal processing, a "sideband" is a frequency component of a signal that is not present in its original form. This means that it has been filtered out or removed from the signal during the process of filtering or convolution. Sidebands are typically represented by a complex-valued vector, where one component represents the phase and the other components represent the magnitude of the frequency component. The presence of sidebands can affect the quality of the resulting spectrum or the way that the signal is processed.
