[oc] Query on cordic...

[sridhar nandula <nandulasridhar@yahoo.com>]

I am working on cordic currently.
I need to rotate the incoming samples by some theta.
the range of theta may be from -60 to +60. 
I want to use the cordic to do the rotation. 
But the problem is my theta will increase linearly. 
some thing like this:
if starting theta is 20 degrees. then next thetas are 
40,60,80,100,120,140,160, 180, 190, 200, ......, 380,
400, 420, ........900, 920 .............
goes on. 
some of you know that the limitation of Cordic is the
input angle should be between -90 and +90.
Can some body suggest me some method to do this type
of rotation? 
of course rotation with 40 degrees is same as rotating
with 400 degrees or 760 degrees or 1120 etc due to
periodicity.
Any help in this regard is appreciated.

Regards,
Sridhar



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