Cordic computation of sin/cos using combined approach in associative memory

Abstract

A method for concurrently estimating trigonometric functions for multiple angles in an associative memory device includes, for each angle, selecting an initial value from a look-up table (LUT) storing values of N initial iterations of a CORDIC algorithm, and concurrently performing M subsequent iterations of the CORDIC algorithm starting from the selected initial values, to determine a final trigonometric function value for each angle. A system for concurrently estimating trigonometric functions for multiple angles includes a look-up table (LUT) configured to store pre-computed values corresponding to N initial iterations of a CORDIC algorithm, and an associative memory array configured to select, for each angle one of the pre-computed values as an initial value, and concurrently compute M subsequent iterations of the CORDIC algorithm using the selected initial values as a starting point, to generate a final trigonometric function value for each angle.

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