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This paper introduces the design of a generalized fractional order logistic map suitable for pseudorandom number key generators and its application in an encryption system based on FPGA. The map is generalized through two parameters (a,b) where complete analysis of their effect on the map is detailed, which gives more control on the map chaotic regions. The vertical map and the zooming map presented...
This paper presents a secured highly sensitive image encryption system suitable for biomedical applications. The pseudo random number generator of the presented system is based on two discrete logistic maps. The employed maps are: the one dimensional double humped logistic map as well as the two-dimensional delayed logistic map. Different analyses are introduced to measure the performance of the proposed...
This paper presents a secured highly sensitive image encryption system suitable for biomedical applications. The pseudo random number generator of the presented system is based on two discrete logistic maps. The employed maps are: the double humped logistic map as well as the fractional order logistic map. The mixing of the map parameters and the initial conditions x0, offers a great variety for constructing...
This paper presents the VHDL implementation of a novel power management algorithm for standalone PV-battery system. The algorithm performs two tasks, Maximum Power Point Tracking (MPPT) and dual load regulation. The MPPT is used to maximize the PV cells' output power, and is achieved by the “fractional open circuit voltage” method. The dual load regulation distributes the PV cells' output power among...
This paper presents a novel power management unit for PV-battery hybrid systems. The proposed unit tracks the PV cells' Maximum Power Point (MPP), distributes the power among dual loads, and handles any surplus or deficit power by a battery. A digital controller has been realized using VHDL, and downloaded on an FPGA to manage a novel single inductor Dual Input Multiple Output DC-DC converter. A prototype...
Maximum Power Point Tracking (MPPT) algorithms are used to track the Maximum Power Point (MPP) of photovoltaic (PV) arrays. Different Algorithms have been introduced, in order to enhance the performance: the tracking speed, oscillations around the MPP, and PV limitations due to partial shading. In this paper, the Perturb and Observe (P&O) and the Three Points Quadratic Approximation (TPQA) have...
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