Hi All, Consider the following very common scenario: A perfect RF signal is heterodyne down-converted to baseband using an offset oscillator. Let's assume this oscillator has x(t) = xo + yot. This produces a time and frequency offset baseband signal. Then, this baseband signal is coherently ADC sampled using that same offset oscillator.
What would the effect of this coherent ADC sampling be? See attached diagram. Here I assumed the ADC timebase is a time-dependent function of the oscillator offset. However, it feels like I'm making a logic error? I can't remember ever seeing anyone accounting for the ADC time-base errors in coherent heterodyne down-converter stages. I have limited experience though. Regards, Stephan.
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