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Wireless Sensor Networks (WSNs) are distributed sensing ecosystems equipped with computational intelligence and radio communication capabilities. The ‘neurons’ of a typical WSN referred to as Sensor Nodes or Motes are tiny, low-cost, resource-efficient modules with embedded intelligence facilitating ultra-fast deployment, flexibility and energy-efficiency in their operations. Industrial Wireless Sensor...
A novel and computationally efficient method for d-q control of solar photovoltaic (SPV) integrated UPQC (PV-UPQC) is presented in this paper. A digital filter is used to extract fundamental positive sequence (FPS) component of distorted grid voltage which is used to generate the sine and cosine values necessary in d-q based control. The shunt compensator of PV-UPQC compensates for the load side power...
The propose of this study is the calculation of optimal approximants for complete order digital filters, by the use of three different schemes based on special projections of frequency Weighted model order reduction (MOR) algorithms, based on namely, the Gradient Flow without Frequency Weighted (GF), the Frequency Weighted Balanced Truncation (FWBT), and the Gradient Flow with Frequency Weighted (FWGF)...
A software requirement standards by IEC is now in draft stage. The publication has already been nubered as IEC 60183-4 which regulates software analysing digitally measured a.c. and d.c. data. TDG (Test Data Generator) like IEC 61083-2 comes with IEC 61083-4. A software used in accreditation laboratory or higher class has to process TDG data within reference values specified in the IEC standards....
This paper describes a proposed busbar protection scheme immune to the impact of the outflow current during internal faults based on the combination of magnitude and phase angle comparisons. The effective relay performance is achieved by implementing the phaselet approach and the adaptive digital mimic filter. The performance of the proposed scheme is extensively analyzed for different fault conditions...
This paper presents a preliminary study on the development and the experiment of biosignal processing system (BPS-SWU v1.0) for learning and research application for undergraduate students in biomedical signal processing laboratory (BME LAB). The first version of our system, the frequency range of lung sound in the normal subjects was investigated by using spectral analysis technique. The experimental...
A method for hybrid active damping in power converters connected to a weak grid using an LCL filter is proposed. It uses feedback of the grid current and capacitor voltage and is derived as an equivalent to the capacitor current feedback active damping method. A co-design procedure for the grid current controller with the proposed hybrid active damping method is presented. The robustness, system bandwidth...
This paper presents the design and implementation of an effective SEU mitigation technique for rad-tolerant Xilinx virtex-4 xqr4vsx55 FPGA used in implementation of Digital Bandwidth Efficient Filter (DBEF) subsystem for INSAT-3DR payload. The Single Event Effects (SEE) on the virtex-4 FPGA are minimized using an external scrubbing engine which is implemented using rad-hard RTSX32SU-CQ84 Actel FPGA...
Digital signal processing techniques are widely used for a large number of applications with digital filters being considered as one of the basic elements. Digital filter design involves several multiply-and-accumulate (MAC) operations, which consume a large amount of hardware resources and computation cost. Distributed Arithmetic (DA) approach is proposed in literature as an alternative and efficient...
Recommender Systems aim to predict the rating or preference of a user given to an item and provide suggestions of further resources that are likely to be of interest. The critical part of the recommender algorithm is finding the similarity metrics, which yield predictions with different accuracies and varieties. In the case of high dimensional feature space, the recommender systems using traditional...
With the development of telecommunication technology over the last decades, the request for digital information compression has increased dramatically. In many applications, such as high quality audio transmission and storage, the target is to achieve audio and speech signal codings at the lowest possible data rates, in order to offer cheaper costs in terms of transmission and storage. Recently, compression...
Phase Locked Loop (PLL) is wide used for grid parameters estimation, as well for grid-converters synchronization. Key block at single-phase Synchronous Reference Frame PLL (SRF-PLL) structure is two-phase generator which is used for generation of two quadrature signals, which are necessary for SRF block. One of the issues that could appear during estimation of grid parameters is appearance of DC offset...
This paper presents a single stage 3P4W (Three Phase Four Wire) SPV (Solar Photovoltaic) by using an adaptive third order digital filter based control technique. The proposed 3P4W SPV system has two main sections. The first section is used to obtain peak power from the SPV array by using an INC (Incremental Conductance) based control technique. Whereas, in second section, an adaptive third order digital...
In this work, an application of constrained genetic algorithm (CGA) based optimization approach has been explored for design of low pass and high pass finite impulse response (FIR) digital filters. To accomplish the task of optimal filter design, a novel constraint function has been proposed and integrated with the fitness function in CGA environment. CGA minimizes the fitness function under supervision...
An optimization approach to design an efficient 2nd order infinite impulse response (IIR) digital integrator (DI) is proposed using Cuckoo search algorithm (CSA). The unique feature of the proposed approach has been the formulation of the condition for obtaining ideal DC frequency response which has been attained by forcing the sum of the z-term coefficients in the denominator equal to zero during...
We presented an improved efficient architecture of low complexity and narrow transition band filter banks for software defined radio applications. A drawback in filter banks is that the narrow transition band filter is designed with high computation complexity. In order to get around this problem, this paper shows how the filter banks architecture can be designed with low complexity by using frequency...
These days, the accuracy of the measured tilt angle is extremely important and it is always a challenge especially for robotics application. MEMS (micro-electro-mechanical system) gyroscope and accelerometer has been widely used to measure the tilt angle along the axis. However, various studies highlighted that MEMS gyroscope and accelerometer has weakness to gain accuracy of orientation. In order...
An 8-bit, 1.25-GS/s subsampling ADC with digital background calibration for frequency-dependent distortion is presented in this paper. The derivative-based dynamic distortion model is extended to linearize the ADC frontend including the input buffer and the T/H. A low sampling rate auxiliary ADC is included on chip to acquire real-time, high-linearity reference samples to enable continuous background...
Wearable Devices (WD) are systems designed to do a specific task, these system are embedded in daily life personal objects. Usual transducers in wearable devices involve accelerometers gyroscopes, cameras etc. In WD is required to design efficiently in terms of power. Therefore, a new trend incorporates acoustic transducer that does not need a power supply to sense. They are very cheap and easy to...
Utilizing high-order passive filters for the voltage-source converters is becoming attractive in industrial applications due to the excellent attenuation performance, smaller size, and lower cost. The LCL, the multituned traps, and recently the combined LCL with multituned traps (LCL-mT) are the most popular high-order filters. However, the increased number of elements and the inherent resonances...
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