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arXiv 1811.02136eess.SP
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协作视距MIMO通信的分布式UAV布局优化

Distributed UAV Placement Optimization for Cooperative Line-of-Sight MIMO Communications

Samer Hanna, Han Yan, Danijela Cabric

摘要:

利用无人机进行协作通信是无基础设施无线网络中一项很有前途的技术。基于无人机的通信的关键挑战之一是回程吞吐量。在本文中,我们提出了优化的无人机群的位置,以实现高复用增益的视线(LoS)MIMO回程。我们开发了两种分布式算法来定位无人机,使得每个无人机移动最小的距离,以实现最高容量的LoS MIMO信道。第一种方法使用迭代梯度下降(GD),第二种方法使用迭代蛮力(BF)。仿真结果表明,这两种算法可以实现高达6倍的容量相比,该方法依赖于随机无人机的位置,在文献中提出的。BF具有不需要任何位置信息的优点,而GD对运动中的误差不太敏感。

英文摘要:

Cooperative communication using unmanned aerial vehicles (UAVs) is a promising technology for infrastructureless wireless networks. One of the key challenges in UAV based communications is the backhaul throughput. In this paper, we propose optimization of the UAV swarm positions to achieve a high mulitplexing gain in line-of-sight (LoS) MIMO backhaul. We develop two distributed algorithms to position the UAVs such that each UAV moves a minimal distance to realize the highest capacity LoS MIMO channel. The first approach uses iterative gradient descent (GD) and the second uses iterative brute force (BF). Simulations show that both algorithms can achieve up to 6 times higher capacity compared to the approach relying on random UAV placement, earlier proposed in the literature. BF has the advantage of not requiring any location information, while GD is less sensitive to errors in motion.

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