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

fYear

2012

fDate

8-9 Oct. 2012

Firstpage

1

Lastpage

6

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);

fLanguage

English

Publisher

ieee

Conference_Titel

Emerging Technologies (ICET), 2012 International Conference on

Conference_Location

Islamabad

Print_ISBN

978-1-4673-4452-4

Type

conf

DOI

10.1109/ICET.2012.6375485

Filename

6375485