Transmission Optimization for Multiple Input Multiple Output (MIMO) Multi access channel with delay limited constraints is analyzed.Applying standard optimization method

the transmission strategies and optimal power allocation schemes are proposed for users.To reduce the complexity of the optimal solution

the analysis is considered in two stages.The first stage gives the distributed optimal pre-codeword ensembles for users using successive decoding and interference avoidance methods.The second stage allocates power for users in the equivalent single-user channel using the water filling method.The best possible ordering of users for successive decoding is also involved.We propose a suboptimal power control strategy based on individual SINR constraints as a substitute for the optimal one when employing the MMSE receiver with successive interference cancellation.Numerical results show that the optimum transmission strategy and the suboptimal one combined with power allocation have the similar performance and both are capable of improving the system capacity and performance.