FftFract32

Overview

Forward FFT of fractional data

Discussion

Computes the fast Fourier transform of a fractional input signal yielding a complex half spectrum. The blockSize, N, of the input must be a power of 2 in the range [2...65536]. The output pin is complex with a blockSize of N/2+1 complex samples. The output pin contains the complex transform data for FFT samples k=0, 1, ..., N/2. The DC (k=0) and Nyquist (k=N/2) samples always have an imaginary component of 0.

Module Pack

Advanced

ClassID

classID = 1268

Type Definition

typedef struct _ModuleFftFract32
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
} ModuleFftFract32Class;

Pins

Input Pins


Name	in
Description	Complex input
Data type	fract32
Channel range	Unrestricted
Block size range	4, 8, 16, 32, 64, 128, 256, 512, 1024
Sample rate range	Unrestricted
Complex support	Real

Output Pins


Name	out
Description	Complex output
Data Type	fract32

Scratch Pins


Channel Count	1
Block size	8
Sample rate	48000

Matlab Usage

File Name: fft_fract32_module.m 
 M=fft_fract32_module(NAME) 
 Computes the forward FFT of real input data.  The input block  
 size must be a power of 2.  The module supports multichannel signals. 
 Arguments: 
    NAME - name of the module.