Main Content

Power spectral density of filter output due to roundoff noise

computes the power spectral density (PSD) of filter output occurring because of roundoff
noise. The roundoff noise is produced by quantization errors within the filter. The PSD is
computed as an average over the `noisepsdOut`

= noisepsd(`sysobj`

,`L`

)`L`

trials.

specifies options using one or more name-value pair arguments in addition to the input
arguments in the previous syntax.`noisepsdOut`

= noisepsd(___,`Name,Value`

)

uses an options object to specify the optional input parameters in lieu of specifying
name-value pairs.`noisepsdOut`

= noisepsd(`sysobj`

,`L`

,`opts`

)

analyzes the filter System object™ based on the arithmetic specified in the `noisepsdOut`

= noisepsd(`sysobj`

,'Arithmetic',`arithType`

)`arithType`

input.

`noisepsd(`

with no
output argument launches FVTool and shows the noise PSD estimate of the filter System object.`sysobj`

,___)

[1] McClellan, James H., editor. *Computer-Based Exercises for Signal Processing
Using MATLAB 5*. Prentice-Hall, 1998.