zero forcing ,csi equalization

hello! i'd like to ask something about the equalization. first of all about the zero forcing equaliztion.i have r(t)=s(t)*(cconv)h(t) + awgn and i want to do zero equaliztion and csi equalization.can you told what should i do? for example for zero forcing i tried 1./H(F) and then ifft(H(F))=h'(t) so s'(t)=r(t)*(cconv)h'(t)but didnt work so probably is wrong what i thing.i really need help. thanks a lot