September 2003
Intermediate to advanced
709 pages
26h 51m
English
Content preview from Digital Arithmetic
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634 c ~ A p~ ~ ~ t 1 CORDIC Algorithm and Implementations
tlo7o2
1t o8
Rotation by Predefined Angles
Some applications, such as the computation of transforms (Fourier, cosine, etc.),
are performed by a sequence of rotations of predefined angles. In such cases, the
representation of the angles by as can be predetermined and the sequences of
cx s stored. Therefore, it is not necessary to perform the z iteration, resulting in a
reduction of the delay and the area.
However, in this case, since the rotation angles are known, the sine and cosine
can be stored and the rotation implemented by multipliers and adders.
Vectoring Followed by Rotation ...
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