Distributed sensing via the ensemble spectra of uncoupled electronic chaotic oscillators
Distributed sensing via the ensemble spectra of uncoupled electronic chaotic oscillators
复制标题
通过非耦合电子混沌振荡器的系综谱进行分布式传感
DOI：
10.1016/j.chaos.2021.111749
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Hiroyuki Ito
中科院分区：
文献类型：
--
作者：
Ludovico Minati;Korkut Kaan Tokgoz;Hiroyuki Ito
一个电子混沌发生器，涉及交叉耦合逆变器环的长度等于最小的奇素数被认为是，时空变化的控制参数，假设对应于一个物理变量被感测，被引入类似于基带信号。它示出，由于该电路方便地生成的频谱图的细粒度结构，控制参数设置及其波动可以准确地估计从频谱，或它的一部分，例如使用一个小的神经网络。模仿被动接收器监听一组这样的节点的效果，然后考虑对从多个不同步的发射器产生的部分频谱重叠且大部分不相干的信号求和的效果。指出了从总体集合信号的频谱估计控制参数的统计和地形分布的某些特征的可能性。物理上的可行性得到证实的实验涉及的集成电路原型实现使用65纳米CMOS技术，通过测量再现性也进行了评估。所提出的方法可能具有实现分布式传感应用的优势，因为传感器节点之间的同步是不需要的，允许使用相当简单的发射器，而不是相互耦合的振荡器。
An electronic chaos generator involving cross-coupled inverter rings with lengths equal to the smallest odd prime numbers is considered, and a spatiotemporally-varying control parameter, hypothetically corresponding to a physical variable to be sensed, is introduced akin to a baseband signal. It is shown that, owing to the fine-grained structure of the spectrogram conveniently generated by this circuit, the control parameter setting and its fluctuations can be accurately estimated from the frequency spectrum, or a portion of it, for instance using a small neural network. Mimicking the effect of a passive receiver listening to a set of such nodes, the effect of summing the partially spectrally-overlapping and largely incoherent signals arising from multiple unsynchronized transmitters is then considered. The possibility of estimating some features of the statistical and topographical distribution of the control parameter from the frequency spectrum of the population ensemble signal(s) is indicated. Physical feasibility is corroborated by experiments involving an integrated circuit prototype realized using 65 nm CMOS technology, through which measurement reproducibility is also assessed. The proposed approach may have advantages for realizing distributed sensing applications because synchronization among the sensor nodes is not required, allowing the use of considerably simpler transmitters rather than mutually-coupled oscillators.