And the capacity of the UMB systems has been greatly improved by using the multiple antenna technology, like the Closed-loop MIMO.
还有闭环MIMO等多天线技术的使用，使得umb系统的系统容量有了极大的提升。
On the other hand, utilizing the smart antenna and the users' spatial information, we can develop the Space Division Multiple Access (SDMA) technology.
另一方面，利用智能天线和用户空间位置信息可以实现空分多址(SDMA)接入技术。
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