According to the theory of orthogonal designs, Tarokh et al. (1999) proved that a complex orthogonal space-time block code that provides full diversity and full transmission rate is not feasible for more than two antennas.
Tarokh等人(1999)运用正交设计理论证明了当发射天线数大于2时,不存在可以获得最大分集增益和最大传输速率的复正交空时分组码。
参考来源 - 一种基于矩阵旋转的正交空时分组码·2,447,543篇论文数据，部分数据来源于NoteExpress
It has full transmission rate, but could not provide full diversity order.
该方案能获得最大传输速率，但不能提供最大的分集增益。
Keeping full diversity order gain, the design can achieve 0.5 transmission rate.
度增益情况下，实现码率为0.5的传送指标。
This technology USES antennas of other users as relays in wireless networks to achieve space diversity and full diversity gain.
这种技术利用通信网中其它用户的天线作为中继，实现“虚拟天线”的空间传输分集，从而提高系统性能。
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