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This paper shows new insights on the stochastic nature of aging-related timing impact in digital circuits. Varying critical paths through aging trigger the need for aging compensation control loop based on an unsupervised machine learning algorithm. Adaptive Resonance Theory (ART) algorithm is favored for its ability to handle the stability-plasticity dilemma.
Upset hardened dual-interlocked cell (DICE) [1] has found an important place in circuits for space applications due to its ability to mitigate single event upsets (SEUs). In this paper, we show that DICE latch/flip-flop exhibits better immunity to metastability compared to D flip-flop, and can be used as data synchronizer. Metastablity constant (τ), whose inverse captures the ability of the latch...
Low Extra Delay Background Transport (LEDBAT) is defined in RFC6817 as a congestion control algorithm for lower than best effort transport service that reacts to both delay and loss congestion signals. LEDBAT allows bulk transfer applications (such peer-to-peer file transfer and software updates) to utilize available capacity in the background while limiting additional forward queuing delays at network...
Standard applications are unable to perform well in delay- and disruption-tolerant networks (DTNs) due to frequent lack of end-to-end connectivity and long communication delays. Such applications must be thus adapted to be able to operate in disadvantageous network conditions. In a previous work on adapting standard tactical applications for DTN networks, we proposed how such an adaptation may be...
ECN thresholds have limited operational range and very strict scope. Lower thresholds exacerbate the queue underflow while higher thresholds increase the queueing delays. In this paper, an Adaptive ECN (A-ECN) marking scheme is proposed to enhance the performance of ECN. A-ECN can adaptively adjust ECN marking thresholds in different scenarios to achieve good generality. Therefore, network operators...
Vendor-independent interoperability is one of the key-enablers for medical devices in future operating rooms, intensive care units, and medical care in general. Using the paradigm of a Service-Oriented Architecture (SOA) is a promising approach realized by the new IEEE 11073 SDC family of standards. Standard compliant communication stacks will be used to build up systems of networked medical devices...
Vehicular Ad Hoc Networks (VANET) have become one of the most important research areas for the successful and deployment of intelligent transportation system and the unmanned vehicle technologies. In VANET, Travel Prediction-based Data Forwarding (TPD) was proposed as one of novel data forwarding schemes based on road traffic statistics. However, the TPD could not guarantee good performance in the...
This work is devoted to the admissibility analysis for singular time-delay systems by using delta operator approach. By estimating the delay term with a two-term approximation, the singular system in delta operator domain is transformed into an interconnection of a time-invariant subsystem with constant delay and a uncertain one. By resorting to the input-output approach, a delay-range-dependent admissibility...
In this paper, we propose a predictor-based sliding mode control algorithm for LTI systems with input-delay and disturbance. It is shown that our proposed algorithm can completely reject the constant disturbance from the state channel. It is also shown that with our proposed algorithm, an enhanced disturbance rejection can be achieved for a large class of other time-varying disturbances. Simulations...
The Predictive PI controller is considered a viable candidate to replace conventional PID for WirelessHART networked control system (WHNCS). This is due to its shared characteristics of simplicity and ease of manual tuning while allowing for mismatches and improved performance even in the presence of stochastic delay. However, in order to avoid excessive overshoots and oscillations due to the stochastic...
A fully synthesizable analog-like loop filter for a Low-Dropout regulator using only digital standard cells is proposed. To accommodate this, various blocks such as comparator, time-to-digital converter and charge-pumps are developed using only standard cells. The fabricated prototype in 0.13μm process occupying 0.0875mm2 provides 15mA current with minimum quiescent current of 140μA and load transient...
The development of ultrafast ultrasound imaging brings great opportunities to improve imaging technologies such as shear wave elastography and ultrafast Doppler imaging. In ultrafast imaging, there are trade-offs among image signal-to-noise ratio (SNR), resolution, and the high frame rate. Multiplane wave (MW) imaging is proposed to solve this tradeoff by encoding multiple plane waves with positive/negative...
Internet of vehicles (IoVs) emerges as a promising technology to facilitate vehicular wireless communication by approving vehicle-to-everything (V2X) services for intelligent transportation systems including vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I) and vehicle-to-pedestrian (V2P) services. V2V networks have been rapidly developed to support short distance data transmission among vehicles...
Logic gates for ultra-low voltages suffer from speed and robustness degradations, which are highly associated with the process technology. In this work a methodology for the automated design-space exploration of standard logic gates for a 28 nm FD-SOI technology is shown. Comprehensive design space explorations of inverter and nand2 gates show the benefits of back-biasing at sub-threshold supply voltages...
Data processing performed by adder circuits need to achieve low delay and low power at the same time while maintaining low cost, due to the steep growth in mobile computation devices. Recently proposed 1-bit full adder design that hybridizes transmission gates (TG) and standard CMOS offers significant PDP improvement. Two full adder implementations are presented in this paper which further optimizes...
We considered the range of PPP online services that solve the problem of high-precision coordinates and receiver time scale shift determination for the RINEX daily records. The comparative estimation of exact indicators of position determination for different geoids is given. The results contains the recommendations for use the online PPP services to solve the problem of time scales comparison.
Network performance anomalies can be defined as abnormal and significant variations in a network's traffic levels. Being able to detect anomalies is critical for both network operators and end users. However, the accurate detection without raising false alarms can become a challenging task when there is high variance in the traffic. To address this problem, we present in this paper a novel methodology...
The majority of UWB positioning systems rely on the first path component time of arrival measurements. In most systems, positioning algorithms assume that obtained results correspond to direct path component related to the distance between transmitter and receiver. Unfortunately, indoors, first path signal component is often delayed or even blocked by the walls or elements of interior design, what...
This work is focused on a technique providing the integration of the method of clustered voltage scaling (CVS) in the digital design flow. The efficiency of this technique in the case of a hashing unit IP-block is considered. In order to reduce the power consumption special hash algorithms (NH, PH) in combination with the CVS approach were proposed. For the implementation of the CVS technique a number...
The predictive proportional integral (PPI) controller being simple and non conservative like its Smith predictor and internal model control (IMC) counterparts, has the ability to be employed in environments characterised by uncertainties such as stochastic network delays. However, its performance degrades in the presence of measurement noise. This is due to the prediction involve in the controller...
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