- Source:
Examples
var shift = require('dsp-fftshift')
shift.fftshift(signal)
shift.ifftshift(signal)// ES6 syntax
import { fftshift, ifftshift } from 'dsp-fftshift'
fftshift(signal)// included in dsp-kit package
var dsp = require('dsp-kit')
dsp.fftshift(signal)
dsp.ifftshift(signal)Methods
(static) fftshift(buffer) → {Array}
Zero-phase windowing alignment
CAUTION: this function mutates the array
Perform a cyclic shifting (rotation) to set the first sample at the middle of the buffer (it reorder buffer samples from (0:N-1) to [(N/2:N-1) (0:(N/2-1))])
Named by the same function in mathlab: fftshift
Parameters:
| Name | Type | Description |
|---|---|---|
buffer |
Array |
- Source:
Returns:
the same buffer (with the data rotated)
- Type
- Array
(static) ifftshift(buffer) → {Array}
Inverse of zero-phase windowing alignment
CAUTION: this function mutates the array
Parameters:
| Name | Type | Description |
|---|---|---|
buffer |
Array |
- Source:
- See:
-
- fftshift
Returns:
the same buffer (with the data rotated)
- Type
- Array