Mixer-based down-conversion object
Use this to mix two signals together in a down-converter configuration, translating an RF frequency to a lower IF frequency by mixing with an LO. Note that RF-IF and LO-IF isolation may be specified.
menu: veeos ==> Signal Processing ==> Modules ==> downConvert
library: sigLib
In communications it is very common to place a baseband signal on carrier that is at much higher frequency than the baseband. This allows the broadband baseband signal to be treated as a narrowband signal, moves it to a convenient frequency for transmission and allows many other possible processing steps. Conversely it is common to reverse this up-conversion with a down-conversion to retrieve the original baseband signal. This object uses a mixer to mathematically model such frequency conversion. Note that while lekage is allowed within the model, it is not specifically accounted for as higher-level mixing products.
Any basic communications text will talk about this subject.
Uses aMixer to simulate the actual mixing action.
VEE 7.0+, all platforms
analogAmp, analogFilter, upConvert