Re: [Discuss-gnuradio] Block diagram of FPGA interface

[Matt Ettus]

Quoting Achilleas Anastasopoulos <address@hidden>:

> Dear all,
>
> I am trying to understand exactly what kind of SP
> is going on the Rx and Tx path of the FPGA and basic
> Rx/Tx.
>
> I am attaching an eps file (and an xfig file) with a hypothesized block
> diagram that is the result of all the information I have
> collected on the website and the discussions.
>
> Can you comment on that and tell me if this is
> exactly what is going on?


Just one minor correction from what I said before.  The way you show the
multipliers and the NCO is not quite correct.  It is doing a full complex
multiplication.  The CORDIC does the NCO and the multiplication together.  Your
diagram does not show the cross products being created.


The math is effectively a vector rotation.

Matt