Title :
A novel design approach for ROM-less direct digital frequency synthesizers based on polynomial approximations
Author :
Chau, Yawgeng A. ; Chen, Yao-Hua
Author_Institution :
Dept. of Commun. Eng., Yuan Ze Univ., Yuan Ze
Abstract :
A new design principle of the ROM-less direct digital frequency synthesizer (DDFS) based on the polynomial approximation is proposed, where the spurious free dynamic range (SFDR) is used as a design criterion for the polynomial coefficients. The optimal SFDR is pursued, and is transformed into a Chebyshev minimax problem with constraints. Numerical examples are presented to illustrated the SFDR evaluations.
Keywords :
direct digital synthesis; polynomial approximation; Chebyshev minimax problem; ROM-less direct digital frequency synthesizers; design criterion; numerical examples; polynomial approximations; polynomial coefficients; spurious free dynamic range; Chebyshev approximation; Design engineering; Digital signal processing; Dynamic range; Frequency measurement; Frequency synthesizers; Minimax techniques; Piecewise linear approximation; Polynomials; Signal design;
Conference_Titel :
Intelligent Signal Processing and Communications Systems, 2008. ISPACS 2008. International Symposium on
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-2564-8
Electronic_ISBN :
978-1-4244-2565-5
DOI :
10.1109/ISPACS.2009.4806772
