Title :
Phase compensated differential based quadrature direct digital frequency synthesis
Author :
Ullah, Anees ; Ali, Hazrat ; Khan, Yasir Ali ; Aamir, Muhammad ; Ali, Nazim ; Yahya, Khawaja Muhammad
Author_Institution :
Dipt. di Autom. e Inf. (DAUIN), Politec. di Torino, Turin, Italy
Abstract :
Quadrature Direct Digital Frequency Synthesis (QDDFS) is a device which can generate both sine and cosine simultaneously. This paper presents a method based on linear interpolation and least square error curve fitting to develop a phase compensation logic for the QDDFS. The architecture is suitable for VLSI implementation of QDDFS and is more area efficient and time efficient than look up table based approaches and Coordinate Rotation Digital Computer (CORDIC) based approaches respectively.
Keywords :
curve fitting; digital arithmetic; direct digital synthesis; interpolation; least mean squares methods; CORDIC; QDDFS; VLSI; coordinate rotation digital computer; least square error curve fitting; linear interpolation; phase compensated differential; phase compensation logic; quadrature direct digital frequency synthesis; table based approach; Computer architecture; Equations; Frequency shift keying; Frequency synthesizers; Interpolation; Optimization; Oscillators; Direct Digital Frequency Synthesis (DDFS); Numerically Controlled Oscillator (NCO); Quadrature Direct Digital Frequency Synthesis (QDDFS);
Conference_Titel :
Emerging Technologies (ICET), 2012 International Conference on
Conference_Location :
Islamabad
Print_ISBN :
978-1-4673-4452-4
DOI :
10.1109/ICET.2012.6375485
