Hi , Conversion of a filter from time domain to frequency domain is not going to change the entire properties.If Wiener is FIR and in frequency it is IIR the stability of the filter becomes questionable. But any way if you look at the Wiener filter it is a FIR filter in both domains. -Bob

Hi all. I am new in DSP, and have a misunderstanding related to Wiener filtration. I have both source and desired signals (actually images) available. As I understand, when Wiener filter is calculated in spatial domain (straightforwardly or approximated using LMS) with predefined filter size, it is a FIR filter. But if it is calculated in frequency domain using H(w)=Pxy(w)/Pxx(w), is it a IIR filter? Thanks.