Spurious-Free Dynamic Range of CORDIC Based Digital Quadrature Demodulator

This paper presents research of influence of CORDIC algorithm parameters on the single tone spurious free dynamic range (SFDR) for the digital mixer. The best parameters of CORDIC for most effective digital mixer, with high spectral purity are identified. The results is dependence of SDFR shift to CORDIC parameters, and approximating expression, that helps to get guaranteed SFDR for selected CORDIC parameters over the entire frequency range.