for others information, It's not that I can not do my homeworks! ... i've been involved in a series of ieee papers(all from one person who does not reply to my emails) that's references to each other and explain about the details tooo little tooo paradoxical,for two monthes. it's like he did not wanted anybody understand his work, or maybe he was faking his success!
and also, I can not stop feel pity for those who make points for themselves by blaming others...
and i did not say that simulate the paper for me, i just asked how could we have real weights with complex FFTbased recursion! keep on laughing then!