PCONV Periodic convolution Usage: h=pconv(f,g) h=pconv(f,g,ftype); PCONV(f,g) computes the periodic convolution of f and g. The convolution is given by L-1 h(l+1) = sum f(k+1) * g(l-k+1) k=0 PCONV(f,g,'r') computes the convolution where g is reversed (involuted) given by L-1 h(l+1) = sum f(k+1) * conj(g(k-l+1)) k=0 This type of convolution is also known as cross-correlation. PCONV(f,g,'rr') computes the alternative where both f and g are reversed given by L-1 h(l+1) = sum conj(f(-k+1)) * conj(g(k-l+1)) k=0 In the above formulas, l-k, k-l and -k are computed modulo L. The input arrays f and g can be 1D vectors or one of them can be a multidimensional array. In either case, the convolution is performed along columns with row vectors transformed to columns.
Url: http://ltfat.github.io/doc/fourier/pconv.html
See also: dft, involute.
Package: ltfat