Abstract: A new global-optimality multi-user detection algorithm with preprocessing unit is proposed in this paper.Utilizing the suggested algorithm，users’information can be directly estimated by preprocessing unit.Besides，it also can ensure that the received information code is uniform with the results by optimal multi-user detection.In this paper，the effectiveness of the algorithm is validated by Space Time Block Coding（STBC） system as example.The simulation results indicate the users’information can be exactly judged by the proposed algorithm，result with the lower bit error rate and also the improved system performance.

摘要： 提出了一种新型的带有预处理模块的全局最优多用户检测算法，该算法可以通过预处理模块直接判断出用户信息，并保证所得的用户信息码与最佳多用户检测得到的结果相同。以STBC系统为例验证了该算法的有效性，仿真结果表明该算法可以精确地判断出用户信息，通过使用该算法可以实现更低的系统误码率，大大提高系统性能。