最小空间尺寸的三小区MIMO干扰广播信道的自由度可实现性

Ahmed Medra, T. Davidson
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引用次数: 2

摘要

我们考虑了三单元MIMO干扰广播信道(IBC),每个基站分配K个用户。每个基站有M = 2K + 1根天线,每个用户有N根天线。我们提出了两种不同的线性预编码方案,以实现每个用户只接收一个数据流的最佳自由度(DoF)。第一种方案是通过求解格拉斯曼流形上的一个优化问题,通过一系列封闭步骤找到发射预编码器和接收波束形成器。该方案的一个优点是能够以尽可能少的发射和接收天线数量实现最佳的DoF。在第二种方案中,一个小区中的用户将有额外的K - 1天线,但我们已经能够为发送预编码器和接收波束形成器的每一步生成提供封闭形式的解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On the achievability of the degrees of freedom for the three-cell MIMO interfering broadcast channel with minimum spatial dimensions
We consider the three-cell MIMO interfering broadcast channel (IBC) with K users assigned to each base station. Each base station has M = 2K + 1 antennas and each user has N antennas. We propose two different linear precoding schemes to achieve the optimal degrees of freedom (DoF) for the case in which each user receives only one data stream. The first scheme finds the transmit precoders and receive beamformers using a sequence of closed-form steps that is initiated by the solution of an optimization problem on the Grassmannian manifold. One advantage of this scheme is the ability to achieve the optimal DoF with the minimum possible number of transmit and receive antennas. In the second scheme, the users in one cell will have additional K - 1 antennas, but we have been able a closed-form solution for each step of the generation of the transmit precoders and receive beamformers.
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