webit/fft

Web-IT FFT Library

Web-IT FFT (Fast Fourier Transformation)

FFT and IFFT Calculator, _(*1)

Installation

via Composer

Add the webit/fft into composer.json, _(*2)

{
    "require": {
        "php": ">=5.3.2",
        "webit/fft": "~1.0"
    }
}

Usage

FFT

<?php
use Webit\Math\Fft\FftCalculatorRadix2;
use Webit\Math\Fft\Dimension;
use Webit\Math\ComplexNumber\ComplexArray;

// FFT
$calculator = new FftCalculatorRadix2();
$signal = ComplexArray::create(array(123, 456, 789, 1111));

$fft = $calculator->calculateFft($signal, Dimension::create(4)); // ComplexArray

IFFT

<?php
use Webit\Math\Fft\IFftCalculator;
use Webit\Math\Fft\FftCalculatorRadix2;
use Webit\Math\Fft\Dimension;
use Webit\Math\ComplexNumber\ComplexArray;

// FFT
$calculator = new IFftCalculator(new FftCalculatorRadix2());
$signal = ComplexArray::create(array(123, 456, 789, 1111));

$ifft = $calculator->calculateIFft($signal, Dimension::create(4)); // ComplexArray