Recently, coordinated multiple point transmission/reception (CoMP) is proposed to overcome the performance degradation due to the inter-cell interference (ICI) in a multi-cell environment. In this paper, we present a multiuser MIMO-BC technique with limited feedback, and propose the novel codebook for cooperative beamforming to reduce the ICI. Based on the proposed codebook, an orthogonal beamforming is performed, which can support NB - η users simultaneously. The residual η degrees of freedom is used for the ICI mitigation. The numerical results show that the orthogonal beamforming based on the proposed codebook can obtain the η degrees of freedom efficiently without any loss of performance.
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机译：近来，提出了协调多点发送/接收（CoMP）以克服由于在多小区环境中的小区间干扰（ICI）引起的性能下降。在本文中，我们提出了一种反馈有限的多用户MIMO-BC技术，并提出了用于协作波束形成的新型码本，以减少ICI。基于提出的密码本，进行正交波束成形，可以同时支持N B -η个用户。剩余的η自由度用于ICI缓解。数值结果表明，基于所提出的码本的正交波束形成可以有效地获得η自由度，而不会损失任何性能。
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