Karen M. Guan

Learn More
Level-crossing analog-to-digital converters (LC ADCs) have been considered in the literature and have been shown to efficiently sample certain classes of signals. One important aspect of their implementation is the placement of reference levels in the converter. The levels need to be appropriately located within the input dynamic range, in order to obtain(More)
Level-crossing A/D converters (LCA/D) have been considered in the literature and have been shown to efficiently sample certain classes of signals. In this paper we provide a stable algorithm to perfectly reconstruct signals of finite rate of innovation using level-crossing samples. Furthermore, we also apply level-crossing sampling to detection of(More)
Level-crossing analog-to-digital converters (LC ADC) have been studied in the literature and have been shown to efficiently sample certain classes of signals, in this paper we first characterize a class of bursty source signals. We then provide an information theoretical formulation that studies the application of LC ADC in data transmission in conjunction(More)
Level-crossing analog-to-digital converters (LC ADCs) have been considered in the literature and have been shown to efficiently sample certain classes of signals. One important aspect in their implementations is the placement of the reference levels in the circuitry. In order to obtain samples, the levels need to be appropriately placed within the input's(More)
a r t i c l e i n f o a b s t r a c t In this paper, we investigate level-crossing (LC) analog-to-digital converters (ADC)s in a competitive algorithm framework. In particular, we study how the level sets of an LC ADC should be selected in order to track the dynamical changes in the analog signal for effective sampling. We introduce a sequential LC sampling(More)
We propose a level-crossing A/D (LCA/D) converter which can be modelled with an oversampling A/D followed by a low resolution quantizer. In this paper we will study the reconstruction of non-bandlimited inputs processed by such a system and compare its performance to uniform sampling. Index Termslevel-crossing sampling, MSE, Haar wavelets, bitrate.
Compressive sensing (CS) achieves efficiencies in signal collection, particularly in scenarios where the monitored bandwidth is large and the signal of interest is sparse. In this paper we present a survey of published hardware prototypes by assessing their architecture and comparing their performance to conventional analog-to-digital converters (ADCs). We(More)
We report tensile experiments on Ni80P20 metallic glass samples fabricated via a templated electroplating process and via focused ion beam milling, which differed only in their surface energy states: Ga-ion-irradiated and as-electroplated. Molecular dynamics simulations on similar Ni80Al20 systems corroborate the experimental results, which suggest that the(More)
  • 1