Abstract:

The problem of analyzing the multiuser diversity (MUD) while taking both the gains of spatial diversity and spatial multiplexing into consideration is addressed within time division multiple access (TDMA) multiple-input multiple-output systems. A framework based on the concept of diversity-multiplexing tradeoff (DMT) is proposed. First, the multiuser outage probability is derived employing classical probability theory. Second, for any codes in TDMA system with given data rate, an upper bound of error probability can be derived. Then, for approximately universal codes in TDMA system with given data rate, a lower bound of error probability is obtained as well. The optimal DMT curve of a TDMA system is presented to reflect the MUD aimed at bridging the studies of MUD and DMT. Simulations coincident with theoretical analysis.

Key words: multiple-input multiple-output, time division multiple access, multiuser diversity, diversity-multiplexing tradeoff