Efficient approximations of the four-quadrant arctangent function have been developed using simple transformations on I and Q data. The proposed quadrant and octant based implementations can be used to achieve favorable trade-offs between computational cost and accuracy.

Approximations, Arctangent, Implementation, Transformations
2006 Canadian Conference on Electrical and Computer Engineering, CCECE'06
Department of Systems and Computer Engineering

Rajan, S, Wang, S. (Sichun), & Inkol, R. (Robert). (2007). Efficient approximations for the four-quadrant arctangent function. In Canadian Conference on Electrical and Computer Engineering (pp. 1043–1046). doi:10.1109/CCECE.2006.277814