In the joint multiple access systems, which are based on the CDMA and SDMA techniques, the assignment of spreading codes should be based on the orthogonality of the spatial vector of the mobile users.

• 在基于码分多址(CDMA)和空分多址(SDMA)技术的联合多址系统中,扩频码的分配应根据移动用户空间向量的正交性来进行。