[USRP-users] Capturing signals at the carrier

Ian Buckley ianb at ionconcepts.com
Thu Sep 19 12:23:34 EDT 2013


DC Offset removal is positioned upstream from (before) the CORDIC.

On Sep 19, 2013, at 7:42 AM, "Cochenour, Brandon M CIV NAWCAD, 4.5.6" <brandon.cochenour at navy.mil> wrote:

> DC-offset removal was my second guess.  Does this happen before or after the CORDIC?  
> 
> Judging from the link, it seems the way to go here to tune my LO slightly off-band...digitize at an IF...allow the DC offset corrections to happen (away from my signal)...THEN have the CORDIC bring me down to baseband?
> 
> I'm using the NI LabView driver, so the UHD code snippets aren't always intuitive.  I think that is what the manual is getting at though.
> 
> http://files.ettus.com/uhd_docs/manual/html/general.html#two-stage-tuning-process 
> 
> 
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