Zero Forcing equalization is the simplest method to estimate the transmitted symbols in a MIMO system using linear space time coding (See reference  for the theoretical background). For particular codes (orthogonal codes), ZF equalizer gives the same results than the optimal (ML) receiver.
The zip file contains three m files.
- space_time_coding.m (perform space time coding)
- coherent_ZF_receiver.m (perform ZF space time equalization)
- one_shot_ZF_equalizer.m (show an example)
To use these files, extract the three files in the same folder. Then, call the script one_shot_ZF_equalizer in the matlab command window. See the file space_time_coding.m to obtain the list of supported STBCs.
 E.G. Larsson,P.Stoica. "Space-time block coding for wirelesscommunications", Cambridge Press,2003