Computes the convolution of two series using the FFT method.
FCONV(series1, series2)
series1 |
- |
A series. |
series2 |
- |
A series. |
A series or table.
W1: gsin(1000, .001, 2)
W2: gsin(1000, .001, 4, 4)
W3: conv(W1, W2)
W4: fconv(W1, W2)
Performs the convolution of two sine waves. W3 performs direct convolution in the time domain and W4 performs the same convolution using the FFT method.
The convolution of series x[n] and h[n] is defined as:
FCONV performs convolution by multiplying the FFTs of the zero padded input series. This method is faster than CONV for large series.
See CONV for the time domain implementation.