Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: Phase shift in Simulink
Replies: 7   Last Post: Dec 4, 2013 7:10 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Speed

Posts: 3
Registered: 9/17/09
Phase shift in Simulink
Posted: Sep 21, 2009 2:58 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Hello All,

I am using simulink to generate phase noise. Basically I have a since wave generator and want to introduce phase noise to this. Surprisingly I haven't found a phase shifter block in simulink. I even didnt find an Allpass filter.
One other related issue I have is to generate a constant 90 degree phase shift (generate a cos signal). I do not want to introduce a new sine generator with a phase shift. I want to be able to use a single sine generator, then phase shift it by 90 degrees to get separate sine and cos signals.
I am working with continuous time signals. I a constant phase shift (to generate cos signals), I even tried taking derivative (I get the 90 degrees shift but a weird gain ...which is not omega times the signal like what we expect - d(sinwt)/dt = wcoswt). I even tried to create a basic all pass filter using the transfer function block with the fn as (s-1)/(s+1), still I dont get a 90 degree phase shift.

Please help me with these to concerns.
1. To introduce a constant phase shift of 90 degrees
2. To be able to generate a random pahse shift.

I can play around and get the solutions even if I get to know the solution for one of the above points. Only point to be noted is that it has to be in Simulink and not using matlab code.

This is my first post in this forum. Hope to get some positive responses.

Thanks s lot for your time and support,

With best regards,
Speed



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.