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Continuous Phase Oscillator in Simulink

14 Dec 2007 (Updated 03 Jun 2009)

Generate a simple cosine wave in Simulink

File Information
Description	A Simulink model that generates and displays a simple cosine wave. The model computes the cosine function using the continuous phase method, which is based on Euler's formula for the complex exponential. The cosine generator is provided as a subsystem, which the user can copy-and-paste into other models. The subsystem's mask allows the user to control two parameters: the oscillation frequency 'Fc', and the sampling rate 'Fs'. The model includes three versions of the oscillator sub-system: 1. Floating-point (double-precision). 2. Fixed-point with no magnitude stabilization 3. Fixed-point with magnitude stabilization All three outputs are plotted using a Time Domain Scope. In addition, the first and third outputs are also plotted in the Frequency Domain using the Spectrum Scope.
Required Products	Signal Processing Blockset Signal Processing Toolbox Simulink Simulink Fixed Point
MATLAB release	MATLAB 7.8 (R2009a)
Zip File Content
Other Files	license.txt, Oscillator_01.mdl

Tags for This File
Everyone's Tags	communications, complex exponential, continuous phase, cosine, demo, euler, example, oscillator, signal processing, simulink, sine, sinusoidal, spc, wave
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Updates
18 Dec 2007	Fix the keywords, and clean-up the description.
20 Dec 2007	Minor improvements to the .mdl file and the screenshot.
10 Jan 2008	Added more detail to the description
10 Jan 2008	Fixed typo in description, and clarified 'grow' to 'grow without bound'.
03 Jun 2009	Major update to incorporate fixed-point and magnitude stabilization.

Tag Activity for this File
Tag	Applied By	Date/Time
oscillator	Rick Rosson	26 Jan 2009 15:07:43
sine	Rick Rosson	26 Jan 2009 15:07:43
cosine	Rick Rosson	26 Jan 2009 15:07:43
example	Rick Rosson	26 Jan 2009 15:07:43
demo	Rick Rosson	26 Jan 2009 15:07:43
simulink	Rick Rosson	26 Jan 2009 15:07:43
complex exponential	Rick Rosson	26 Jan 2009 15:07:52
signal processing	Rick Rosson	26 Jan 2009 15:08:27
communications	Rick Rosson	26 Jan 2009 15:08:34
spc	Rick Rosson	12 Feb 2009 13:30:53
continuous phase	Rick Rosson	12 Feb 2009 13:31:17
sinusoidal	Rick Rosson	12 Feb 2009 13:31:31
wave	Rick Rosson	12 Feb 2009 13:31:40
euler	Rick Rosson	11 Jun 2009 11:10:05

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