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On the design of frequency-switching patterns for distributed data fusion over relay networks

机译：中继网络上分布式数据融合的频率切换模式设计

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摘要

Recent contributions have shown that, by switching frequency bands at intermediate relay nodes, enhanced diversity can be attained in two-user wireless frequency division relay networks at a minimum computational cost. This paper elaborates on the design of frequency-switching patterns for more involved relay scenarios. We conclude that in general, the optimum set of frequency-switching patterns is based on the subset of derangement permutations of {f1, ..., fN}, i.e. of the N frequency bands utilized in the setup. In order to illustrate our approach, our work focuses on the particular distributed data fusion scenario where the data generated by an information source is simultaneously sensed by N nodes and broadcasted, through a relay network, to N remote destinations. Simulation results made for several scenarios verify that the proposed derangement-based relaying scheme outperforms other frequency-switching relay approaches in terms of end-to-end fused Bit Error Rate (BER).
机译：最近的贡献表明，通过在中间中继节点处切换频带，可以以最小的计算成本在两用户无线频分中继网络中获得增强的分集。本文详细介绍了涉及更多中继场景的频率切换模式的设计。我们得出的结论是，通常，最佳频率切换模式集基于{f 1 ，...，f N }的排列置换子集，即设置中使用的N个频段中的一个。为了说明我们的方法，我们的工作集中在特定的分布式数据融合方案上，其中信息源生成的数据同时被N个节点感知，并通过中继网络广播到N个远程目标。在几种情况下进行的仿真结果证明，在端到端融合误码率（BER）方面，所提出的基于失序的中继方案优于其他频率切换中继方法。

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