EFFICIENT ROTATOR DESIGN FOR SINUSOIDAL TRANSFORMS

Transforms are an integral part of any digital signal processing algorithm. Now a days, the real-time systems like Orthogonal Frequency Division Multiplexing (OFDM) or High Efficiency Video Coding (HEVC) requires transforms to be calculated on a very fast basis with significant accuracy. Initially to calculate the basis/coefficients of a transform the techniques like look up table based, CORDIC based are well known. Moving further, CORDIC can be used with shifters to further reduce the complexity. The aim of this said paper is to analyze and implement (creating the architecture) the sinusoidal transforms like FFT/DCT used in many core signal processing algorithms with the required accuracy. Results indicates improvement in the accuracy after 18th order compared to basic CORDIC