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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.
Aiming at the problem that MUD analysis method can not reflect both spatial diversity and spatial multiplexing gain simultaneously, a method to analyze MUD in TDMA (Multiple Input Multiple Output) systems is proposed. Firstly, Then the probability of user interruption is deduced; then the error probability of any given code with given data rate in TDMA system is deduced as the lower bound of multi-user interruption probability. Finally, the upper bound of the error probability of any asymptotical universal code with given data rate in the system is derived , And the optimal DMT curve is obtained.This method based on DMT can reflect the performance of MUD while taking spatial diversity and spatial multiplexing into account, so as to construct MUD performance analysis and DMT analysis The bridge.The simulation results show the correctness of the theoretical analysis.