Function Reference

bandwidth

Compute the frequency response bandwidth

Syntax

• fb = bandwidth(sys)
  fb = bandwidth(sys,dbdrop)
  

Description

fb = bandwidth(sys) computes the bandwidth fb of the SISO model sys, defined as the first frequency where the gain drops below 70.79 percent (-3 dB) of its DC value. The frequency fb is expressed in radians per second. You can create sys using tf, ss, or zpk, see ltimodels for details.

fb = bandwidth(sys,dbdrop) further specifies the critical gain drop in dB. The default value is -3 dB, or a 70.79 percent drop.

If sys is an S1-by...-by-Sp array of LTI models, bandwidth returns an array of the same size such that

• fb(j1,...,jp) = bandwidth(sys(:,:,j1,...,jp))
  

See Also
dcgain      Compute the steady-state gain of LTI models

issiso      Returns 1 if the system is SISO

ltimodels   General information about LTI models

balreal

bode