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中文摘要：
针对目前多用户分集度（MUD）分析方法无法同时反映空间分集和空间复用增益的问题,提出了一种在时分多址（TDMA）多入多出系统中分析MUD的方法.首先推导了多用户中断概率;然后针对TDMA系统中给定数据速率的任意码,推导出其差错概率以多用户中断概率为下界;最后推导出该系统中给定数据速率的任意渐进通用码的差错概率上界,并由此获得最优分集复用折中（DMT）曲线.这种基于DMT的方法能在考虑空间分集度和空间复用的同时反映出MUD的性能,从而为MUD性能分析和DMT分析构建了桥梁.仿真结果表明了理论分析的正确性.
英文摘要：
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.
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