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Combine-and-forward: A linear cooperative multi-level communication strategy for distributed MIMO relays

机译：合并转发：分布式MIMO中继的线性协作多级通信策略

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摘要

This work analyzes cooperative networks in which a single source message is retransmitted by multiple levels of relays that are equipped with multiple antennas. In the considered scheme, each relay linearly combines its receptions from multiple antennas and multiple levels before adjusting its power and forwarding it. The proposed scheme outperforms the previously proposed methods that are based on decoding and forwarding in the low SNR regime. The contributions of this paper are two-fold: (i) it provides an analytical framework for the statistics of the accumulated signal and the accumulated noise as functions of network parameters such as noise level, power level, number of antennas, and multi-hop diversity for dense networks; (ii) it shows that the performance of multi-level networks can be improved simply by combining the receptions from the previous levels and multiple antennas in a linear fashion. (C) 2019 Elsevier B.V. All rights reserved.
机译：这项工作分析了协作网络，在该网络中，通过配备多个天线的多级中继来转发单个源消息。在考虑的方案中，每个中继在调整功率并转发之前，将其从多个天线和多个电平的接收线性组合。所提出的方案优于先前提出的基于低SNR机制中的解码和转发的方法。本文的贡献有两个方面：（i）它提供了一个分析框架，用于统计累积信号和累积噪声作为网络参数（例如噪声水平，功率水平，天线数量和多跳）的函数。密集网络的多样性; （ii）它表明，简单地通过以线性方式组合来自先前级别的接收和多个天线，可以提高多层网络的性能。 （C）2019 Elsevier B.V.保留所有权利。

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