Methods to improve the performance of quadrature phase-to-amplitude conversion based on Taylor series approximation

This paper presents a Taylor series approximation based method for digital sine and cosine phase-to-amplitude conversion. The performance of the phase-to-amplitude conversion and the spurious free dynamic range (SFDR) of the output signal are improved by applying methods similar to those used in direct digital frequency synthesizers for ROM compression. Finally, simulation results according to the number of approximation terms and the amplitude bit width are presented and compared with other phase-to-amplitude conversion methods.