Forum Discussion
Occasional ContributorCORDIC rotator angle input units
The documentation does not state what the input angle units are.
From the IP GUI, it looks like they might be radians, even though 1.0000 = 2pi radians (or the signed equivalent) is a much better way to do a CORDIC, allowing a quick bit test for quadrant on angle inputs, and quick truncation of excess turns on arctan.
Are the units actually radians, where 3243F (b16) is 180 degrees?
2 Replies
SyafieqSSuper Contributor
Kevin,
Can you show me a snapshot might be good, are you referring to?
KCMurphyWhen I find time, I will post something in detail. But one thing that the Altera design misses: One of the primary reasons people use a CORDIC is to get rid of the terribly difficult number "pi". Particularly in binary logic. It is actually not part of a CORDIC calculation unless someone makes it so.
A very clear description of CORDIC can be found here: http://dspguru.com/dsp/faqs/cordic/
