Title :
Second-order parabolic approximation: a new mathematical approximation dedicated to ROM-less DDFSs
Author :
Sodagar, Amir M. ; Lahiji, G. Roientan
Author_Institution :
Dept. of EE, S. Rajaee Univ., Tehran, Iran
Abstract :
An extended form of the parabolic approximation, which was previously introduced by the authors, is proposed. The proposed form of the approximation is so close to the sine function that satisfies the accuracy requirements for a typical sine-output direct digital frequency synthesizer (DDFS). However, the novel approximation presents a suitable formula for sine function in signal processing algorithms and software, and it is shown that it can be implemented using digital hardware
Keywords :
direct digital synthesis; function approximation; signal processing; ROM-less DDFSs; digital hardware implementation; mathematical approximation; parabolic approximation; second-order parabolic approximation; signal processing algorithms; signal processing software; sine function; sine-output DDFS; sine-output direct digital frequency synthesizer; Approximation error; Error correction; Frequency synthesizers; Hardware; Microelectronics; Power dissipation; Read only memory; Shape; Signal processing algorithms; Table lookup;
Conference_Titel :
Microelectronics, 2000. ICM 2000. Proceedings of the 12th International Conference on
Conference_Location :
Tehran
Print_ISBN :
964-360-057-2
DOI :
10.1109/ICM.2000.916412
