Design of Rectangular to Polar Reconfigurable Cordic

R.Bharat Kumar, Emandi Jagadeeswararao

Abstract


CORDIC is an acronym for Coordinate Rotation Digital Computer. The CORDIC algorithm is a repetitive calculation approach ability of emerging different basic functions with a proper shift-and-add method Used to evaluate a large amount of functions. It has been used for many years for efficient implementation of vector rotation operations in hardware. It is executed merely by table look-up, shift, and addition operations. Rotation of vectors through fixed and known angles has many applications in animations, robotics, games, computer graphics and digital signal processing. In this paper we present improved method of shifting by using an alternate scheme by increasing the no. of barrel shifters with increasing pre shifting method and Fault Tolerance in Bi Rotational CORDIC circuits higher rate of accuracy in fixed and known rotations. The improvement in the fixed angle Rotation reducing the area- and Complexity in the application. From the basic architecture of cordic an fixed angle rotation is implemented by vector rotation. the rotation of vectors uncontrolled by the circuit till all rotations are completed it will results large system gain and unpredictable angles for effective operation of known angles in this paper angle correction, Quadrant correction and gain correction is implemented, this paper also proposed the rectangular to polar cordic for reducing number of multiplication and addition, also mentioned the simulation results.


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