sig2osp

Compute the order spectrum of a signal.

Usage

sig2osp(x, sr, f1 {, do, no, oini})

a

amplitude or power spectrum (vector)

sr

signal sampling rate in Hz; 0 < sr

f1

frequency of the 1st order in Hz; 0 < f1 < sr/4

do

resolution of the order spectrum; 0 < do (default=0.1)

no

length of the order spectrum; 2 < no (default=500)

oini

amplitude value for order spectrum initialization (default=0)

Description 1

The function computes the amplitude spectrum of the signal x using a radix-2 fft. The signal is expanded with zeros to the next possible fft transformation length if necessary. The same resampling algorithm as used by the function asp2osp is used to convert the frequency spectrum to an order spectrum.

Result

The order spectrum o (vector with no elements).

See also

ticks2f1, asp2osp, otrack1

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