The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We consider GNSS meaconing detection with multiple COTS receivers. Recently proposed detectors that use the receivers' reported positions are extended, to allow for the use of additional metrics, such as pseudo range. An actual meaconing attack is performed to evaluate the performance of the proposed detectors, using either position or pseudo range data. The attack is performed with a GPS simulator,...
The level of requirements for a readout front-end electronics dedicated for X-ray imaging applications, such as: high count rate ability of input pulses, low noise, low power dissipation and low silicon area occupation noise, is still increasing. The question: what one can do to minimize silicon area and keep front-end electronics analog parameters at a desirable level at the same time, is still important...
The development of next-generation networks has been driven by a number of use cases aimed at supporting innovative applications and services. Among these drivers the Internet of Things has gained momentum due to its potential to leverage Machine Type Communications (MTC), a term used to denote machine-centered communications among sporadic, bursty traffic generating devices. While scalability issues...
This paper presents multi-objective optimization of a front-end electronics implemented in multichannel integrated circuit for silicon sensors readout in the Silicon Tracking System in the CBM experiment at the FAIR center. We present the optimization towards low-power (< 8 mW/channel) and low-noise while keeping the channel pitch of 58 μm and minimum number of external components required for...
This paper presents the circuits and systems developed for testing the DSToTIC3 ASIC. Detailed study of the estimated noise performance in the presence of realistic external components is also a subject of this paper. DSToTIC3 is a prototype, 8-channel front-end electronics designed for the regime of long silicon strip sensors and interconnects of new tracking detectors. Layout and general architecture...
Remote sensing satellites use Charge Coupled Detectors (CCD) to achieve lower noise and higher dynamic range. Operation of a CCD requires high precision clocks/sequences. Generally it is achieved by using Phase Locked loop (PLL) or Delay Lock Loop (DLL). DLL are preferred for their low noise. An All Digital Delay Lock Loop (ADDLL) is designed to be used in the timing generation core. It is implemented...
Electro-thermal models are commonly used in simulations and designing MEMS devices, also in case of microbolometers. These models allow to estimate sensors performance before fabrication that consequently impacts on fabrication cost. Coupling of electric and thermal domains and building appropriate model for carrying out simulations are crucial to detect all phenomena having impact for Readout Integrated...
Recently, it has been shown that the electromagnetic interference generated by computer platforms like laptops, smart phones, tablets, or PDAs fits a double-sided K-distribution statistic. This kind of impulsive noise can severely degrade the performance of linear receivers intended for operation under additive gaussian noise. Therefore, we propose the use of a quasi-optimal detection scheme with...
We study the problem of amplify-and-forward relaying in a hybrid satellite-terrestrial communication system with imperfect channel gains. Signals are received by masked destination earth station (ES) with the help of a relaying ES, situated at the ground with good line-of-sight. No direct transmission is possible from the satellite to the destination ES. The satellite-relay ES link is assumed to be...
Detecting the presence of target subspace signals with unknown clutters is a well-known hard problem encountered in various signal processing applications. Traditional methods fails to solve this problem because prior knowledge of clutter subspace is required, which can not be obtained when target and clutter are intimately mixed. In this paper, we propose a novel subspace detector that can detect...
In a cognitive radio (CR) scenario, we study the joint problem of spectrum sensing and jamming detection. Modelling the scenario as a multiple hypothesis testing problem, we analyse the probability of detection of the optimal detector in the sense of Neyman-Pearson theorem. We derive one exact form in terms of a series and a closed-form version. Moreover, we evaluate the asymptotic probability of...
Digital phase-locked loop (PLL) with dynamic hybrid Delta-Sigma (ΔΣ) phase/frequency detector (PFD). It combines the benefits of a traditional analog charge-pump-based PLL and a modern time-to-digital converter (TDC)-based alldigital PLL, namely, infinite phase-error detection resolution and all-digital control of a digitally controlled oscillator, respectively. An Lth-order ΔΣ analog-to-digital converter...
The nano-injection sensor is a new approach towards high-sensitivity short-wave infrared photon imagers. It resolves the conflict of requiring a large area for high quantum efficiency and small area for high fidelity by using a relatively large micron-scale absorbing volume, and nano-scale sensing elements, which regulates the electron flow and amplifies the signal. The front-end electronics for the...
Wireless sensor network applications typically include various sensors (temperature, humidity, gas, etc.) and each sensor has different requirements of speed, noise, offset, and power consumption. In order to optimize the performance and allow long-time operation, reconfigurability is mostly desirable in the readout circuitry. In this paper, a reconfigurable time-domain comparator (RTDC) with low...
The optical characterization of a CMOS 64×64 single-photon avalanche-diode (SPAD) array with in-pixel 11b time-to-digital converter (TDC) is presented. The overall full-width half-maximum (FWHM) of the detector ensemble SPAD plus TDC is 690ps. The sensor has been fabricated in a 0.18μm standard CMOS technology which features an average dark-count rate (DCR) of 42kHz at 1V excess voltage (Ve) and room...
Biomolecular interactions are central to biological processes and typically take place at nanometer scale distances. They often involve molecular motion which is known to affect the accuracy of the parameter estimates. Therefore, in this paper, we consider a case of two closely spaced molecules with planar trajectory and present a general expression of the Fisher information matrix in terms of their...
In this paper, we present the design of a columnwise readout integrated circuit (ROIC) along with thermal modeling of uncooled thermal sensor array. Two major noise sources, namely fixed pattern noise due to process variation and self-heating due to electrical biasing of microbolometer detectors, are addressed in this work. Fully differential approach is used at the input stage in order to reject...
This paper presents a novel outlier removal method which is capable of fitting ellipse in real-time under high outlier rate, based on the phenomenon that outliers generated by ellipse edge point detector are likely to appear as groups due to real-world nuisances, such as under partial occlusion or illumination change. To confront the grouped outliers while maintaining the fitting efficiency, we introduce...
Two dimensional magnetic recording (TDMR) technology aims at achieving recording densities as high as 10 Tb/in2 with the current interest in achieving >1 Tb/in2. In TDMR, the size of a bit is reduced to the order of the size of magnetic grains. The effects of this are two-fold: a) increased interference in cross-track as well as down-track directions and b) ultra high jitter noise due to irregular...
Given noisy samples of a signal, the problem of testing whether the signal belongs to a given parametric class of signals is considered. We examine the nonparametric situation as for a well-defined null hypothesis signal model we admit broad alternative signal classes that cannot be parametrized. For such a setup, we introduce testing procedures relying on nonparametric kernel-type sampling reconstruction...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.