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Power Electronic equipment that converts a DC power into AC power at required voltage and frequency level is known as Inverter. Voltage Source inverters produce an output voltage or current with levels either zero to positive voltage or zero to negative voltage that means two levels. These bi-level inverters are powered by different type of gating signals like square, quasi - square and sinusoidal...
Power Electronic equipment that converts a DC power into AC power at required voltage and frequency level is known as Inverter. Voltage Source inverters produce an output voltage or current with levels either zero to positive voltage or zero to negative voltage that means two levels. These bi-level inverters are powered by different type of gating signals like square, quasi — square and sinusoidal...
In this work, we focus on the problem of virtual machines (VMs) placement in geographically distributed data centers, where tenants may require a set of networking VMs. The aim of the present work is to plan and optimize the placement of tenant's VMs in a distributed Cloud environment while considering location and system performance constraints. Thus, we propose ILP formulations which have as objective...
Hardware impairments of physical transceivers that create distortions degrade the performance of communication. This paper analyzes the performance with different relay selections which include partial relay selection and opportunistic relay selection in amplify-and-forward (AF) cooperative network with hardware impairments. Partial relay selection is that the relay node is selected depending on the...
The enormous increase in data has led to the next grand challenge in computing: the big data problem-that is, the practice of collecting complex datasets so large that they're difficult to store, process, and interpret manually or using traditional data management applications. This column discusses the role of modeling and simulation science in the era of big data applications. Modeling and simulation...
With the increase in wireless communication technology, encryption of information sent has become a major concern. This involves both the software level and hardware level encryption. GSM was the first cellular system that paid attention to secure mobile communication. Before the advent of GSM the cellular system had no particular security. The GSM voice calls are encrypted using a family of algorithms...
The Constrained Application Protocol (CoAP) is a promising candidate for future smart city applications that run on resource-constrained devices. However, additional security means are mandatory to cope with the high security requirements of smart city applications. We present a framework to evaluate lightweight intrusion detection techniques for CoAP applications. This framework combines an OMNeT++...
In this live demonstration, we will show a real-time emulator for reproducing neural activities in the retina and the visual cortex. The emulator comprises a hardware retina emulator and SpiNNaker chips. Taking advantages of multiple parallel processing techniques, the emulator generates simulated spikes with 1 ms precision. Visitors can observe simulated neural response displayed on a personal computer...
This paper presents an error-resilient wavelet-based ECG processor under voltage overscaling (VOS). A novel predictor based on weighted-average bilateral estimation (WBE) is proposed and used for algorithmic noise tolerance (ANT) that compensates the VOS-incurred errors. A two-stage ANT mechanism using heterogeneous error-detection techniques is developed, which enhances the robustness of ANT. This...
Bluetooth Low Energy (BLE) is a recently developed energy-efficient short-range radio communication technology, which is currently vastly gaining popularity and which might become an enabler for implementing in practice the Internet of Things (IoT) concept. However, the complexity of the protocol and the lack of the simulation tools impedes the studies of BLE network performance. For this reason,...
Polar codes have a regular-recursive structure, which can efficiently be mapped to hardware for practical applications. A good quantization scheme plays a great important role in hardware implementation. In this paper, three uniform quantizers are designed for successive cancellation (SC) decoding of polar codes based on either optimizing the equivalent channel capacity, cutoff rate or mean-squared...
As the demand for large-scale wireless multimedia sensor networks increases, so does the need for well-designed protocols that optimize the utilization of available networks resources. This requires experimental testing for realistic performance evaluation and design tuning. However, experimental testing of large-scale wireless networks using hardware testbeds is usually very hard to perform due to...
In this paper a novel multiple gain switched capacitor (SC) DC-DC converter circuit with eleven switches and two flying capacitors along with a filter capacitor is presented. This converter is capable of powering electronic devices at different voltages in the buck or boost mode. Since proposed SC topology is inductorless, these converters can achieve multiple gains either in buck or boost mode at...
A surface Electrogastrography (EGG) system uses electrodes placed on the abdomen of the patient to verify the gastric myoelectric activity. Physicians use EGG systems to aid the patients' diagnosis with gastric disorders. In this context, the results of the EGG examinations must be accurate to avoid errors on the patient's evaluation. The medical device and the software to control the device must...
Driver Assistance Systems (DAS) like lane keeping assistance, pedestrian crossing detection, roadway signal identification or the electronic stability program are characterized by a basic software and hardware architecture [1]. ECU or Electronic Control Units have been an integral part of today's automotive industry since it provided added safety and control to the driver along with various modes...
Commodity hardware can be used to build a software router that is capable of high-speed packet processing while being programmable and extensible. Therefore, software routers provide a cost-efficient alternative to expensive, special hardware routers. The efficiency of packet processing in resource-constrained nodes (e.g. software routers) can be strongly increased through parallel processing with...
This paper presents an improved ISI shaping technique for multi-bit ΔΣ DACs. Compared to the prior ISI shaping method (Lars Risbo et al, JSSC, 2011) that monitors only the up (0 → 1) transitions, the proposed technique makes use of both the up and down (1 → 0) transitions with negligible hardware cost. It provides a finer control of the transition activity, thereby improving the ISI shaping effect...
Variable carrier frequency control of PWM inverter based on deadbeat control using SoC-FPGA based hardware controller was proposed. The inductor current was controlled using digital hysteresis method and the output current was controlled using deadbeat control with disturbancecompensator. As the result, the control accuracy and the efficiency of the inverter can be adjustable with superior tracking...
This paper presents a simulation prototype design for wireless sensor networks (WSNs). It allows the performance evaluation (e.g., packet delivery rate, transmission latency and energy consumption) at high level, but with elaborate models of the hardware and software of sensor nodes. Many hardware components are modeled and the IEEE 802.15.4 standard is implemented. The prototype uses a clock based...
Many types of stochastic algorithms, such as Monte-Carlosimulations and Bit-Error-Rate testing, require veryhigh run-times and are often trivially parallelisable, so are natural candidates for execution using FPGAs. However, the applications are reliant on Gaussian Random Number Generators (GRNGs) with good statistical properties, as very small biases over trillions of random samples can lead to incorrect...
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