What is a CSDF block

[fhongjin]

Hi guys,
I am trying to learn IQ calibration in an RF transiever. There is a block named CSDF. I really need some help on what it does and what’s the circuit’s structure.

 

[stenzer]

Hi,

if you are dealing with a digital system it's most likely a Canonical Signed Digit Filter

https://www.allaboutcircuits.com/te...ion-to-canonical-signed-digit-representation/

BR

 

[FvM]

It's simply annoying to see a "micro" snippet from a paper or book without a citation.

In digital communication, CSDF usually refers to channel selection digital filter. Detailed discussion in text books e.g. https://link.springer.com/book/10.1007/978-3-319-44222-8