spectrum.periodogram
Periodogram spectrum
Syntax
Hs = spectrum.periodogram
Hs = spectrum.periodogram(winname)
Hs = spectrum.periodogram({windowname,winparameter})
Description
Note
The use of spectrum.periodogram
is not
recommended. Use periodogram
instead.
Hs = spectrum.periodogram
returns
a default periodogram spectrum object, Hs
, that
defines the parameters for the periodogram spectral estimation method.
This default object uses a rectangular window and a default FFT length
equal to the next power of 2 (NextPow2
) that is
greater than the input length.
Hs = spectrum.periodogram(winname)
returns
a spectrum object, Hs
, that uses the specified
window. If the window uses an optional associated window parameter,
it is set to the default value. This object uses the default FFT length.
Hs = spectrum.periodogram({windowname,winparameter})
returns
a spectrum object, Hs
, that uses the specified
window and optional associated window parameter, if any. You specify
the window and window parameter in a cell array with the window name
and the parameter value. This object uses the default FFT length.
Valid window names are:
'Bartlett' 'Bartlett-Hann' 'Blackman' 'Blackman-Harris' 'Bohman' 'Chebyshev' 'Flat Top' 'Gaussian' 'Hamming' 'Hann' 'Kaiser' 'Nuttall' 'Parzen' 'Rectangular' 'Triangular' 'Tukey' 'User Defined'
See window
and the corresponding window function page for window parameter
information.
You can use set
to change the value of the
additional parameter or to define the MATLAB® expression and parameters
for a user-defined window (see spectrum
for
information on using set
).
Note
Window names must be enclosed in single quotes, such as spectrum.periodogram('Tukey')
or spectrum.periodogram({'Tukey',0.7})
.
Note
See periodogram
for more
information on the periodogram algorithm.
Examples
References
[1] harris, fredric j. “On the Use of Windows for Harmonic Analysis with the Discrete Fourier Transform.” Proceedings of the IEEE®. Vol. 66, January 1978, pp. 51–83.
Version History
Introduced before R2006a
See Also
periodogram
| pmtm
| pwelch