Highpass filter design in Matlab

1. What is high pass filter in Matlab?
2. How do you high pass filter a signal in Matlab?
3. Which method is suitable for designing high pass filter?

What is high pass filter in Matlab?

A high-pass filter attenuates signals below a cutoff frequency (the stopband) and allows signals above the cutoff frequency (the passband). The amount of attenuation depends on the design of the filter.

How do you high pass filter a signal in Matlab?

y = highpass( x , wpass ) filters the input signal x using a highpass filter with normalized passband frequency wpass in units of π rad/sample. highpass uses a minimum-order filter with a stopband attenuation of 60 dB and compensates for the delay introduced by the filter.

Which method is suitable for designing high pass filter?

A highpass filter is to be designed, using the 'direct' method, i.e. by placing transfer function poles and zeros at suitable points in the z-plane.