This study presents a sub-Nyquist sampling model using compressed sensing (CS) as a new signal processing framework to acquire and reconstruct sparse signals. High-speed periodic signals were sampled using low frequency sampling circuit and reconstructed via CS recovery algorithm, resulting in a high equivalent sampling frequency. This prototype system is able to capture repetitive waveforms at...

We discuss the local asymptotic behavior of the likelihood function associated with all the four characterizing parameters (α,β ,δ ,μ) of the Meixner Lévy process under high-frequency sampling scheme. We derive the optimal rate of convergence for each parameter and the Fisher information matrix in a closed form. The skewness parameter β exhibits a slower rate alone, relative to the other three ...

This paper describes Data-Weighted-Averaging (DWA) algorithms for multibit complex bandpass ∆ΣAD modulators with arbitrary signal bands. In most of bandpass ∆ΣAD modulators, their sampling frequency is chosen as four times of the center frequency of their signal band in order to simplify the following digital filter design. But with this relationship, their performance would be limited by the t...

Joint Synchronization and Calibration of Multi-channel Transform-domain Charge Sampling Receivers. (May 2009) Pradeep Kotte Prakasam, B.E., Anna University, Chennai, India Chair of Advisory Committee: Dr. Sebastian Hoyos Transform-domain (TD) sampling is seen as a potential candidate for wideband and ultra-wideband high-performance receivers and is investigated in detail in this research. TD re...

background: this study aims to assess the pattern of meal frequency consumption of iranian children and adolescents at national and subnational levels according to the socioeconomic status (ses) of the living region. methods:  this multi-centric study was conducted in 2011-2012 among 14,880 students, aged 6-18 years, who were selected by multistage random cluster sampling from 30 provinces. mea...

The modern, advanced CMOS direct radio frequency (RF)-sampling data converter has been eagerly awaited by system design engineers for several major end-equipment manufacturers. This includes manufacturers of communications infrastructure, software-defined radios (SDRs), radar systems, or test and measurement products. Recently introduced data converters are delivering the high dynamic range com...

Data sampling and its effect on the microseismic events locations and in particular azimuth measurements is the objective of this study. The study focuses on how Principal Component Analysis efficiency [2] depends on the relationship between dominant frequency and sample rate using synthetic events with white noise. Moreover, the resistance of event location methodology to the sampling rate and...

Recent studies employing rapid sampling techniques have demonstrated that the resting state fMRI (rs-fMRI) signal exhibits synchronized activities at frequencies much higher than the conventional frequency range (<0.1 Hz). However, little work has investigated the changes in the high-frequency fluctuations between different resting states. Here, we acquired rs-fMRI data at a high sampling rate ...