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2010•Microelectronics & ComputerRequires access

FPGA Implement of a Modified CORDIC Algorithm

Naian Liu

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Abstract

To achieve arctan calculation in second quadrant or third quadrant,the improvement measure of increasing the two 45° rotation on traditional CORDIC algorithm is proposed. The hardware pipeline structure of the modified CORDIC algorithm is put forward and simulated on FPGA stratix EP1S10F484C5 of Altera company. The simulation results indicated that the modified CORDIC algorithm result is essentially coincident with theoretical value and has less errors,therefour,the modified CORDIC algorithm can be used for arctan calculation of any point in coordinate plane.

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What this paper is about

To achieve arctan calculation in second quadrant or third quadrant,the improvement measure of increasing the two 45° rotation on traditional CORDIC algorithm is proposed. The hardware pipeline structure of the modified CORDIC algorithm is put forward and simulated on FPGA stratix EP1S10F484C5 of Altera company. The simulation results indicated that the modified CORDIC algorithm result is essentially coincident with theoretical value and has less errors,therefour,the modified CORDIC algorithm can be used for arctan calculation of any point in coordinate plane.

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Available abstract

To achieve arctan calculation in second quadrant or third quadrant,the improvement measure of increasing the two 45° rotation on traditional CORDIC algorithm is proposed. The hardware pipeline structure of the modified CORDIC algorithm is put forward and simulated on FPGA stratix EP1S10F484C5 of Altera company. The simulation results indicated that the modified CORDIC algorithm result is essentially coincident with theoretical value and has less errors,therefour,the modified CORDIC algorithm can be used for arctan calculation of any point in coordinate plane.

Key concepts: CORDIC, Computer science, Field-programmable gate array, Inverse trigonometric functions, Pipeline (software), Algorithm, Stratix, Quadrant (abdomen)

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