DocumentCode
2134674
Title
An improved numerically controlled digital oscillator
Author
Menon, Sreeraj ; Cho, Grace ; Soderstrand, Michael
Author_Institution
Sch. of Electr. & Comput. Eng., Oklahoma State Univ., Stillwater, OK, USA
Volume
2
fYear
2003
fDate
28-30 Aug. 2003
Firstpage
1040
Abstract
Adding a small lookup table (LUT) to adjust the feedback in a second-order numerically controlled digital oscillator (NCDO) eliminates all of the stability problems created by roundoff error in digital oscillators. The new NCDO uses less hardware than any of the three major competing approaches: (1) sinusoidal look up table, (2) digital oscillators with roundoff compensation, and (3) CORDIC based designs. The new NCDOs have applications in heterodyne adaptive filters, in FSK and PSK detection, in digital music synthesis and in many other applications.
Keywords
circuit stability; feedback oscillators; table lookup; CORDIC based designs; FSK detection; PSK detection; digital music synthesis; heterodyne adaptive filters; numerically controlled digital oscillator; roundoff compensation; sinusoidal look up table; Adaptive filters; Digital control; Feedback; Frequency shift keying; Hardware; Oscillators; Phase shift keying; Roundoff errors; Stability; Table lookup;
fLanguage
English
Publisher
ieee
Conference_Titel
Communications, Computers and signal Processing, 2003. PACRIM. 2003 IEEE Pacific Rim Conference on
Print_ISBN
0-7803-7978-0
Type
conf
DOI
10.1109/PACRIM.2003.1235963
Filename
1235963
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