Performance analysis of STBC with multi-user diversity and transmit antenna subset selection in MIMO system

This paper presents performance analysis of STBC scheme with multi-user diversity (MUD) and transmit (TX) antenna subset selection (AnSS) where the user and the antenna subset are adaptively selected in MIMO systems. We derive an analytical expression for the average effective SNR and outage probability, showing that STBC scheme with MUD and Tx-AnSS provides full diversity. We also derive analytical expressions for the STBC scheme with only MUD. Analytical results show that the STBC scheme with MUD and Tx-AnSS obtains an effective SNR gain, while the STBC scheme with only MUD shows a SNR loss over SISO (Single Input Single Output) system. Thus the STBC scheme combining MUD and Tx-AnSS keeps their own benefits and provides outage probability improvement without additional burdens in contrary to the STBC scheme with only MUD. We verify the analytical results through simulations.