论文标题
Noma Beam Forming在SDMA网络中：骑在现有梁上还是形成新的梁？
NOMA Beamforming in SDMA Networks: Riding on Existing Beams or Forming New Ones?
论文作者
论文摘要
在这封信中，在空间划分多访问（SDMA）遗产系统中研究了非正交多访问（NOMA）波束形成的设计。特别是，采用并比较了NOMA文献中两种流行的光束形成策略，一种用于使用现有的SDMA束，另一个用于形成新的光束。信函中进行的研究表明，这两种策略实现了系统性能和复杂性之间的不同权衡。例如，以轻微的性能损失为代价，骑在现有梁上可显着降低计算复杂性。此外，当用户的渠道结构结构时，这种简单的策略可以实现最佳性能。
In this letter, the design of non-orthogonal multiple access (NOMA) beamforming is investigated in a spatial division multiple access (SDMA) legacy system. In particular, two popular beamforming strategies in the NOMA literature, one to use existing SDMA beams and the other to form new beams, are adopted and compared. The studies carried out in the letter show that the two strategies realize different tradeoffs between system performance and complexity. For example, riding on existing beams offers a significant reduction in computational complexity, at the price of a slight performance loss. Furthermore, this simple strategy can realize the optimal performance when the users' channels are structured.
