Hi
Two months ago we had long discussions about why GNURadio was
using complex signal, and what really is such a signal.
We talked about 'spinning dancer' 'sampling the data twice', and
using "dogs as local oscillators". It was obvious that we need
some tutorial.
I'm glad to introduce a new tutorial trying to answer this basic but important subject https://wiki.gnuradio.org/index.php/IQ_Complex_Tutorial
I was not able to cover the subject in 10 min, so I will not get
the Noble price of education ( see Jeff long email from November
the 3rd 2020) )
This tutorial should be considered as a draft, I can and want to
improve it.
- I used as less maths as possible, but whatever you don't understand, whatever you feel is not comprehensible should be modified: just ask it on the forum.
- I included some flowgraph, as simple as possible. A s a
consequence some simulation can be quite far from the real SDR
world
- I feel this tutorial is probably too long, however only 50% are needed to get the main aspect of IQ and complex signal.
- I must confess that my english is poor and weak so I would
appreciate if someone could at least improve the text by "making
it english".
Regards, Christophe
