Compressed sensing with a tunable random sampling strategy has great potential in reducing the energy/time consumption during the constant acquisition of external information, thereby it is considered one of the most promising sensing strategies in edge-terminal. In this letter, a novel tunable stochastic oscillator (TSO) based on the VO ₂ /TaO _x structure was proposed and employed as the core controlling device for compressed sensing. The TSO is jointly governed by the metal-insulator-transition (IMT) based threshold switching of the VO ₂ layer and the stochastic resistive switching by the TaO _x layer. The tunable memristor/resistor in series can modulate the oscillation frequency of the TSO. The orthogonal matching pursuit (OMP) algorithm is implemented to reconstruct the compressed sparse signals, demonstrating a good performance of TSO in compressed sensing.

中文翻译：

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基于混合VO 2 / TaO 3装置的可调谐随机振荡器用于压缩传感

具有可调随机采样策略的压缩感测在不断获取外部信息的过程中具有降低能耗/时间消耗的巨大潜力，因此被认为是边缘终端中最有前途的感测策略之一。在这封信中，提出了一种基于VO ₂ / TaO _x结构的新型可调谐随机振荡器（TSO）， 并将其用作压缩传感的核心控制装置。TSO由基于金属-绝缘体转变（IMT）的VO ₂层阈值切换 和TaO _x的随机电阻切换共同控制 层。串联的可调忆阻器/电阻器可以调制TSO的振荡频率。实现了正交匹配追踪（OMP）算法，重构了压缩后的稀疏信号，证明了TSO在压缩感知中的良好性能。