Outage Capacity Analysis of Multiuser Diversity in MIMO Antenna Selection Systems

This paper develops a framework to analyze the outage capacity of multiuser diversity in a multiuser MIMO transmit antenna selection with maximal-ratio combining (TAS/MRC) system. A closed-form expression of the system outage capacity is derived, through which we show how and with what characteristics the MIMO configurations, the number of users and the multiuser diversity affect the outage capacity performance. Both the analytical and simulation results show that (1) the outage capacity increases with the increase of mean of effective average SNR and decreases with the increase of variance of the effective average SNR; (2) to obtain a higher outage capacity, the number of receive antennas should be no more than that of transmit antennas. This paper has presented some conclusions which can be used for the efficient design of multiuser MIMO systems.