phase advancing of a signal by 90 degrees

16 次查看（过去 30 天）

priya 2020-1-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/502095-phase-advancing-of-a-signal-by-90-degrees

评论： priya 2020-1-27

magnitude_angle.slx

I want to sense a signal, and advance the phase of the signal by -90 degrees, keeping the magnitude of the signal same (in MATLAB Simulink). Please help.

I am attaching a simulation, where i tried to extract the magnitude and phase of the signal and added -90 °, and re-convert it. But it is not working.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Walter Roberson 2020-1-27

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/502095-phase-advancing-of-a-signal-by-90-degrees#answer_412166

在 MATLAB Online 中打开

Multiply the signal by -1i .

You can either do that by a multiplication, or by taking

complex(imag(TheSignal), -real(TheSignal))

8 个评论
显示 6更早的评论隐藏 6更早的评论

Walter Roberson 2020-1-27

That is not changing the phase of the signal by 90 degrees: that is putting in a delay of either 1/4 or 3/4 of the period.

Clock times frequency times 2 π, minus phase, sine thereof.

priya 2020-1-27

Thanks for your efforts, Actually i want to sense a signal (that will be of sinusoidal nature) and phase shift it by -90 degress. but that is still not done.

请先登录，再进行评论。

请先登录，再回答此问题。