90 degree phase shift

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Yuntian Luo 2019-12-5

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https://ww2.mathworks.cn/matlabcentral/answers/495102-90-degree-phase-shift

评论： Ridwan Alam 2019-12-14

Hi,

I am using the vary phase of signal during simulation (https://www.mathworks.com/help/simrf/ug/variable-phase-shift.html), when I open the MATLAB command, the example shown works with the phase varying 180 degree. But when I change the simulink control signal into 90 degree, the output becomes into a straight line rather than 90 degree phase shift.

I was wondering if someone knows how to fix this problem or some other ways of doing the 90 degree phase shift.

Thanks

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Yuntian Luo 2019-12-10

Hi thanks again for answering the question, I am kind of busy these days, when I check the answer and done the simulation, I will vote up.

Thanks

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采纳的回答

Ridwan Alam 2019-12-5

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https://ww2.mathworks.cn/matlabcentral/answers/495102-90-degree-phase-shift#answer_405045

编辑：Ridwan Alam 2019-12-6

Updated answer:

The problem is with the way "Outport" and "Configuration" blocks are used here. For example, change the Output parameter of the "Outport" block to Magnitude and Angle mode, and connect both output ports to the scope. Then you can track both the changes in magnitudes and angles of the signal. Also, on the "Configuration" block, make sure to uncheck the noise parameter.

Hope this helps.

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Yuntian Luo 2019-12-14

Thanks. I got your point. The sigal here are the complex type. Now I just want to have90 degree of the real signal instead of complex one. For example, the input is sin(wt) then the output is cos(wt), do you have some method to build it? Or can I rechange the complex signal into the real signal ?

Thanks

Ridwan Alam 2019-12-14