In this paper, we investigate the expected outage probability and expected throughput of a multi-user multiple-input multiple-output (MU-MIMO) transmission in mobile ad hoc networks (MANET) in the presence of co-channel interference and unpredictable inter-beam interference. In order to achieve multi-user diversity gain, the receiving nodes are required to report measured channel information to the transmitting node. During the time gap between channel measurement and data transmission, the channel may change with the location of moving nodes. The unpredictable behavior may cause a mismatch between the weight of beams and the instantaneous channel and the inter-beam interference in the data transmission phase. In order to obtain the closed form expected outage probability, we categorize the behavior of nodes according to whether the inter-beam interference exists or not and the number of received interference beams. The probability of each category and the closed form outage probability of an instantaneous MU-MIMO transmission of each category are derived. Additionally, the expected throughput of an MU-MIMO transmission which changes with the number of receiving nodes is obtained, and the optimal value of receiving nodes to maximize the expected throughput is discussed. Numeric results show the unpredictable inter-beam interference degrades the outage probability performance. Reducing the duration of the time gap could improve the expected outage probability and expected throughput.

中文翻译：

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节点移动性对移动自组织网络中MU-MIMO传输的影响

在本文中，我们研究了在存在同信道干扰和不可预测的帧间干扰的情况下，移动自组织网络（MANET）中多用户多输入多输出（MU-MIMO）传输的预期中断概率和预期吞吐量。光束干扰。为了获得多用户分集增益，要求接收节点将测量的信道信息报告给发送节点。在通道测量和数据传输之间的时间间隔内，通道可能会随着移动节点的位置而变化。不可预料的行为可能会导致数据传输阶段中光束的权重与瞬时通道之间的失配以及光束间干扰。为了获得封闭形式的预期中断概率，我们根据是否存在波束间干扰以及接收到的干扰波束数对节点的行为进行分类。得出每个类别的概率和每个类别的瞬时MU-MIMO传输的闭合形式中断概率。另外，获得了随接收节点的数量而变化的MU-MIMO传输的预期吞吐量，并且讨论了使预期吞吐量最大化的接收节点的最优值。数值结果表明，不可预测的光束间干扰会降低中断概率性能。减少时间间隔的持续时间可以提高预期的中断概率和预期的吞吐量。得出每个类别的概率和每个类别的瞬时MU-MIMO传输的闭合形式中断概率。另外，获得了随接收节点的数量而变化的MU-MIMO传输的预期吞吐量，并且讨论了使预期吞吐量最大化的接收节点的最优值。数值结果表明，不可预测的光束间干扰会降低中断概率性能。减少时间间隔的持续时间可以提高预期的中断概率和预期的吞吐量。得出每个类别的概率和每个类别的瞬时MU-MIMO传输的闭合形式中断概率。另外，获得了随接收节点的数量而变化的MU-MIMO传输的预期吞吐量，并且讨论了使预期吞吐量最大化的接收节点的最优值。数值结果表明，不可预测的光束间干扰会降低中断概率性能。减少时间间隔的持续时间可以提高预期的中断概率和预期的吞吐量。讨论了使预期吞吐量最大化的接收节点的最佳值。数值结果表明，不可预测的光束间干扰会降低中断概率性能。减少时间间隔的持续时间可以提高预期的中断概率和预期的吞吐量。讨论了使预期吞吐量最大化的接收节点的最佳值。数值结果表明，不可预测的光束间干扰会降低中断概率性能。减少时间间隔的持续时间可以提高预期的中断概率和预期的吞吐量。