The new approach is applicable to identify various SIMO transmission channels with common zeros if only the common factor of those channels satisfies a sufficient and necessary condition presented by our paper.The new approach consists of the following stages:firstly

transmitted signals in given alphabets are blindly detected by using a quadratic optimization with integer constraints; then

the SIMO transmission channels are identified on the basis of the estimated signals.Simulation results show that the new approach delivers better performance compared with the ex isting approaches.