What is a DDC (Digital Down Converter)?

Digital down-converter (DDC) changes a digitized, band-restricted signal to a lower frequency signal at a lower sampling rate to work on the resulting radio stages. The process can protect all the data in the frequency band of interest of the original signal. The input and output signals can be genuine samples. Frequently the DDC changes over from the raw radio recurrence or middle of the road recurrence down to a complex baseband signal.