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A Direct Digital Frequency Synthesizer Utilizing Quasi-Linear Interpolation Method Ashkan Ashrafi Reza Adhami
 

Summary: A Direct Digital Frequency Synthesizer Utilizing Quasi-Linear Interpolation Method
Ashkan Ashrafi Reza Adhami
Department of Electrical and Computer Engineering
The University of Alabama in HuntsvilIe
Department of Electrical and Computer Engineering
The University of Alabama in Huntsville
ashkan@,ieee.org rradhami@,ene.uah.edu
Key Words: Direct Digital Frequency Synthesizer, Sinusoidal SignaIs Generation, Polynomial Interpolation
Abstracb In this paper, a novel direct digital frequency
synthesizer (DDFS) is introduced in which a combination
of linear and even piecewise parabolic polynomial
interpolation (EPW) is used to interpolate the first
quadrant of a cosine signal. An appropriate combination
of these two methods is employed to maximize the
spurious free dynamic range and reduce the complexity of
the entire system. The even parabolic polynomial can be
treated as a linear interpolation with respect to the
squared of the accumulator's output, thus the proposed
system is called Quasi Linear Interpolation (QLIP) direct
digital frequency synthesizer.

  

Source: Ashrafi, Ashkan - Department of Electrical and Computer Engineering, San Diego State University

 

Collections: Engineering; Computer Technologies and Information Sciences