Discover MakerZone

MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

Learn more

Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

Apply Today

To resolve issues starting MATLAB on Mac OS X 10.10 (Yosemite) visit: http://www.mathworks.com/matlabcentral/answers/159016

Magnitude of a filter

Asked by Lisa Justin on 20 Feb 2012

Why does filters generally have a magnitude of 1?

0 Comments

Lisa Justin

Tags

Products

No products are associated with this question.

1 Answer

Answer by Wayne King on 20 Feb 2012
Accepted answer

Hi Lisa, Filtering a signal usually implies convolving the signal with the impulse response of a linear time-invariant system.

In the frequency domain this is equivalent to mulitplying the frequency response of the signal with the frequency response of the filter.

Accordingly, it is desirable to have the magnitude of the filter as close to 1 as possible in the passband, so that in the passband, the frequency content of the signal is not modified in magnitude, just in phase.

1 Comment

Lisa Justin on 20 Feb 2012

thanks Wayne

Wayne King

Contact us