Estimations of scattering parameters, such as average scatterer diameter, from rf signals backscattered from random media (tissues) are made from the frequency dependence of the rf signal. The frequency dependence of the rf signal backscattered from the medium is seen in the normalized power spectrum. The normalized power spectrum is found by taking the squared magnitude of the Fourier transfor...

Photonic RF transversal signal processors, which are equivalent to reconfigurable electrical digital processors but implemented with photonic technologies, have been widely used for modern high-speed information processing. With the capability of generating large numbers wavelength channels compact micro-resonators, optical microcombs bring new opportunities realizing that greatly reduced size,...

Human Activity Recognition (HAR) plays a critical role in wide range of real-world applications, and it is traditionally achieved via wearable sensing. Recently, to avoid the burden discomfort caused by devices, device-free approaches exploiting RF signals arise as promising alternative for HAR. Most latest require training large deep neural network model either time or frequency domain, entail...