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In this Paper, the feasibility of an unequal amplitude equal phase power splitter using a microstrip technology in the UHF band is proposed. Unequal splitter with 3-options is designed in the present work, these are conventional microstrip design, Power splitter with input transformer & arbitrary design impedance (A) is introduced to control high impedance values and Power splitter with general...
This paper presents a maximum power point tracking (MPPT) method for tracking the global peak (GP) of photovoltaic (PV) array under non-uniform irradiance using artificial neural network (ANN). A feed forward multilayer perceptron model with Levenberg — Marquardt back propagation algorithm is used for tracking the global peak. The MPPT algorithm takes irradiance of PV modules as input and gives duty...
The application of autonomous directly photovoltaic (PV) powered electro-mechanical has received increasing attention for different applications (e.g. PV water pumping, PV powered cooling of arid climate greenhouses, solar vehicles etc). The PV array output is a nonlinear and time-dependent power supply that varies with solar intensity and cell temperature, so the performance characteristics of the...
This paper proposes a novel architecture and a control scheme for maximum power extraction from the photovoltaic (PV) system under partial shading conditions. In the proposed architecture, each PV module has a flyback type DC-DC converter with a control scheme. Here, a multiple primary windings and a single secondary winding type transformer is used in the flyback converter. The flyback converter...
Photoplethysmography (PPG) is one of the prime non-invasive vascular assessment methodology adopted in modern clinical practice. This paper proposes a modification of delta modulation for effective compression of PPG signal for real time measurements and monitoring applications. Based on the energy content and fluctuations, the PPG signal was windowed and categorized into ‘complex’ or ‘plain’ zones...
Compressed sensing (CS) is one of the growing fields in electrical engineering and applied mathematics finding a number of applications in array processing as well. Direction-of-arrival (DOA) estimation is one of the main problems in array signal processing. In recent years, some CS techniques have been used to estimate DOA. In this paper, a novel algorithm is developed based on sparse multiple measurement...
Swayam cube satellite hosts a passive magnetic attitude control system (PMACS), achieving two axis stabilization and allowing the satellite to rotate about its antenna axis. As a result, power generated by the body mounted solar panels is variable and unregulated. Estimating the power budget and solar panel output for cube satellites which are passively stabilized is challenging. The solar panel output...
This article gives an ample idea about Sliding Mode Controller (SMC) implementation to a DC-DC boost converter for a Solar system to track Maximum Power Point (MPP). SMC implementation accompany three criteria's; they are Hitting, Sliding Mode (SM) Existence and Stability. One diode Photovoltaic (PV) model is designed for lighting applications, and PV output is connected to a boost converter to regulate...
A metamaterial based new microstrip patch antenna design is presented for multiband applications. Metamaterials provide unique features of obtaining high directional gain and miniaturization. Herein, square, hexagonal and star shaped patches have been designed over a Complementary Strip Ring Resonator loaded reactive impedance surface (CSR-RIS). The CSR-RIS unit cell is studied with reflection phase...
This paper presents a new weighted interpolation technique to address the Bayer Color Filter Array (CFA) demo-saicking problem. The proposed technique provides two contributions that have not been reported in conventional interpolation methods. Firstly, it exploits the quincuncial nature of the green component of the Bayer CFA. The second contribution treats each of the three planes or lattices of...
Discrete Fourier Transform is widely used in signal processing for spectral analysis, filtering, image enhancement, OFDM etc. Cyclic convolution based approach is one of the techniques used for computing DFT. Using this approach an N point DFT can be computed using four pairs of [(M-1)/2]-point cyclic convolution where M is an odd number and N=4M. This work proposes an architecture for convolution...
In current global energy scenario, renewable energy sources can play an important role in meeting the ever increasing energy demand. This is due to exhaustive nature of fossil fuels and the environmental pollution caused by other conventional energy sources. Among renewable energy sources, solar photo-voltaic system is the most popular one as solar energy is available in abundance without paying any...
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