Baseband Signal

A baseband signal is a signal where its carrier frequency fc = 0. This type of signal usually consists of a stream of binary numbers, which feeds a digital signal processor (DSP) chip. The processor chip then decodes this information. Usually, coding and decoding of the binary numbers occurs at the baseband level.

This type of signal mixes with a higher frequency signal, known as up converting, at the transmitter end. At the receiving end, a process known as down converting, changes the signal back to baseband, which then feeds a DSP chip.

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