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This paper presents the design of a sub-threshold CMOS peak-instant detector to be used in a phase-locking peak-picking (PL-PP) bionic ear (BE) processor. The detector is formed by a current sample and hold circuit and a voltage comparator to perform the detection of occurrences of maximum and minimum values of the input. Circuit simulation results using CMOS 0.35 μm AMIS technology confirm that the...
Decimal floating-point addition is important for financial and business applications. There has been a growing interest in implementing decimal floating-point adders in hardware to enhance the speed of the decimal floating-point operations. In this paper, a redundant decimal floating-point adder is proposed with the ultimate objective of enhancing the speed of the decimal floating-point addition....
The open-loop de-skewing circuits are traditionally used for fast clock synchronization, but they are unable to deal with the problems induced by run-time variations. This paper presents the design of a skew compensation circuit that can achieve fast lock-in and also perform maintenance operation after lock-in. This circuit is designed on top of the open-loop half-delay-line skew compensation circuit...
Based on the massive floating car data and traffic flow detector data of intelligent movement platform, the average travel speed, the average delay per unit distance and the saturation of road sections are selected to build traffic congestion evaluation system. The accuracy of floating car data is validated with field observations of the typical roads in Guangzhou, the validation result shows that...
We report on our experimental implementation of QKD with orthogonal states. Since, in general, non-orthogonal states cannot be cloned, any eavesdropping attempt in a Quantum Communication scheme using non-orthogonal states as carriers of information introduces some errors in the transmission, leading to the possibility of detecting the spy. Usually, orthogonal states are not used in Quantum Cryptography...
The problem of detecting the presence of time-varying flows in multi-hop wireless networks is considered. In particular, from transmission timing measurements, a test is constructed to determine whether there is a flow of data packets between a pair of nodes. It is assumed that the packet flows may have time-varying (piecewise constant) flow rates. First, a timing-based detector is proposed to detect...
In this paper, a general delay locked loop based frequency multiplier is presented. No LC-tank and ring oscillator are used in the proposed design such that the power dissipation and chip area are drastically reduced. Moreover this multiplier does not require external component and it is primarily intended for ASIC design. All the simulation results are based upon UMC 0.13μm CMOS process at 1.2 V...
According to the situation that different application asks for different requirement of storage node's performance, an adaptive failure detection method with controllable QoS for distributed storage system is proposed. The delay characteristic of heartbeat message is summarized. The relational expressions of neighbor heartbeat message's arrival time in the different network state are established....
The performance of the blind symbol rate detection through non-linearity degrades under some conditions, including small excess bandwidth, limited symbol length and low signal-to-noise ratio. The improved algorithm here considers the main disturbance-continuous part of the power spectral of non-linearity as its envelope layer and eliminates it by an envelope sifting process, thus greatly improve the...
Data aggregation is a fundamental building block of modern distributed systems. Averaging based approaches, commonly designated gossip-based, are an important class of aggregation algorithms as they allow all nodes to produce a result, converge to any required accuracy, and work independently from the network topology. However, existing approaches exhibit many dependability issues when used in faulty...
Unreliable failure detectors are a fundamental building block in the design of reliable distributed systems. But unreliability must be bounded, despite the uncertainties affecting the timeliness of communication. This is why it is important to reason in terms of the quality of service (QoS) of failure detectors, both in their specification and evaluation. We propose a novel dependability-oriented...
We introduce the notion of a swift algorithm. Informally, an algorithm that solves the repeated consensus is swift if, in a partial synchronous run of this algorithm, eventually no timeout expires, i.e., the algorithm execution proceeds with the actual speed of the system. This definition differs from other efficiency criteria for partial synchronous systems. Furthermore, we show that the notion of...
This paper introduces the relevant research related to the navigation and positioning of the moon detector. Then, it takes an analysis of the distribution and component of the lunar atmosphere and determines the impacts on VLBI and USB of the lunar atmosphere by the effects on principles of electromagnetic wave through the atmosphere. Finally, appropriate solutions are given out.
A novel method utilizing state space neural network (SSNN) with adaptive filters is proposed to estimate the traffic flow parameters. The SSNN's network topology is derived from delays and stops estimation problem, so the design of SSNN reflects the relationships that exist in physical traffic systems. To improve SSNN effectiveness, the adaptive filters is proposed to train the SSNN instead of conventional...
In this paper we propose an on-die monitoring scheme to detect and count transient faults (TFs) resulting, as well as not resulting in output SEs, affecting the inputs of data-path latches/flip-flops. This approach allows an early monitoring of the latches/flip-flops vulnerability to TFs, thus discovering intrinsic weaknesses of design or process. The proposed monitoring scheme features a very low...
This paper discusses a multi-user access technique for Ultra-wideband Impulse Radio (UWB-IR) system in energy detection receiver. The UWB-IR system is modulated by On-Off shift Keying (OOK). As multi-users access scheme, the Code Division Multiple Access (CDMA) using the Optical Orthogonal Code (OOC) sequence is adopted. The integral interval and the sample energy threshold value are optimized to...
ICx Radiation, Inc. has implemented a novel timing method for use in a Compton telescope that is capable of nanosecond timing resolution. A critical task in Compton telescope design is to minimize the timing variance between detectors in a large array in order to reduce the background. The voxelSPEC has been developed to combine precise timing with pulse processing electronics in a single device,...
We developed a digital signal processing method to measure the coincidence timing resolution of a 13×13 (4×4×20 mm3) PQS LYSO block coupled with Hamamatsu R9779 PMT and investigated the time alignment effect. A single LYSO (4×4×20 mm3) coupled with R9779 was used as a timing measurement reference which has a resolution of 214 ps (FHWM). Signals from PMTs were captured by oscilloscope and analyzed...
The PET component of NanoPET™/CT (Mediso) contains dual-module detectors, in which every detector module has been built up from two Hamamatsu H-9500 position sensitive photomultipliers (PSPMTs), optically coupled to the same crystal matrix using a thin BK-7 optical glass lightguide, allowing 95 mm AFOV. This arrangement allows to detect the signals of the crystal needles between the two PSPMTs, enlarging...
In this paper, a glitch-free DLL-based clock generator using a feedback-switching detector is proposed for a programmable power management system. The proposed circuitry utilizes feedback switching detectors to eliminate undesired glitch problem which is generated by switching feedback stage of a DLL. The clock generator can generate clock signals ranging from 100MHz to 1.6GHz. The peak to peak jitter...
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