We describe a new method, full waveform inversion by model extension (FWIME) that recovers accurate acoustic subsurface velocity models from seismic data, when conventional methods fail. leverage the advantageous convergence properties of wave-equation migration analysis (WEMVA) with accuracy and high-resolution nature (FWI) combining them into robust mathematically-consistent workflow minimal ...

We consider the problem of time-frequency waveform design for an OFDM dual-functional radar-communications (DFRC) system that communicates with receiver while simultaneously estimating target parameters using backscattered signals. In particular, goal is to achieve a favorable performance trade-off between radar and communications by optimizing subcarrier powers in region interest. First, we fo...

Diffusion encoding along multiple spatial directions per signal acquisition can be described in terms of a b-tensor. The benefit tensor-valued diffusion is that it unlocks the 'shape b-tensor' as new dimension. By modulating b-tensor shape, we control sensitivity to microscopic anisotropy which used contrast mechanism; feature inaccessible by conventional encoding. Since imaging methods based o...

Cost-optimization through the minimization of hardware and processing costs with minimal loss in performance is an interesting design paradigm evolving emerging Multiple-Input-Multiple-Output (MIMO) radar systems. This optimization a challenging task due to increasing Radio Frequency (RF) complexity as well signal algorithm applications requiring high angular resolution. Towards addressing thes...

Fully-adiabatic (thermodynamically reversible) logic is one of the few promising approaches to low-power logic design. To maximize the system power-performance of an adiabatic circuit requires an ultra low-loss on-chip clock source, which can generate an output signal with a quasi-trapezoidal (flat-topped) voltage waveform. In this paper, we propose to use high-Q MEMS resonators to generate the...

Waveform sets with good correlation and/or stopband properties have received extensive attention and been widely used in multiple-input multiple-output (MIMO) radar. In this paper, we aim at designing unimodular waveform sets with good correlation and stopband properties. To formulate the problem, we construct two criteria to measure the correlation and stopband properties and then establish an...

various techniques and methods have evolved recently for the characterization and measurement of microwave devices. Waveform measurement and engineering system among them is a very promising candidate for the optimization and characterization of transistor device for use in power amplifier design. This paper presents an all encompassing waveform measurement and engineering system which is capab...

We present an audio browsing and editing paradigm that incorporates the “focus plus context” visual interaction metaphor. A traditional waveform is displayed in full, and an area of focus is dynamically re-calculated to provide maximum detail in-focus and minimum detail in-context. The interaction metaphor also simultaneously re-scales a frequency-domain display, with increased detail available...

Two experiments investigated the effects of small values of fundamental frequency difference (DF0) on the identification of concurrent vowels. As DF0’s get smaller, mechanisms that exploit them must necessarily fail, and the pattern of breakdown may tell which mechanisms are used by the auditory system. Small DF0’s also present a methodological difficulty. If the stimulus is shorter than the be...