直接序列码分多址分组多用户检测中,干扰用户包括小区分组外用户及相邻小区用户.首先利用子空间投影方法,在所有干扰用户中识别出相邻小区用户,然后对小区内用户进行多用户检测,并通过子空间跟踪方法实现自适应.既保证了性能,又降低了计算复杂度.仿真结果表明算法是实用的. In direct sequence code division multiple access packet multi-user detection, the interfering users include users outside the cell group and users in the adjacent cell.Firstly, using the subspace projection method, the users in the neighboring cells are identified among all the interfering users and then the users in the cells Multi-user detection, and adaptively through the subspace tracking method, which not only guarantees the performance but also reduces the computational complexity.The simulation results show that the algorithm is practical.