sig2osp

Convert an amplitude spectrum to an order spectrum.

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 Programmer Guide/Command Reference/EVAL/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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