Hi ,
I have a
two
known signal with some frequency offset
between them ,
without time delay
difference
, i can conjugate-multiply two signals and get a tone proportional to offset value (pls find attached
picture
for flow-graph
i used
)
.
I think i need some sort of PLL and NCO to correct frequency offset and lock to known signal .
As i know , it's impossible in gnu radio flow graph to make closed loop systems , but how i can implement that in one block ? are there any example block that implemented some thing like that ?
Thank you .
Screenshot from 2017-11-18 19-44-05.png