Faculty Of Engineering Research Paper

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Browsing Faculty Of Engineering Research Paper by Author "12613"

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    A low start-up voltage charge pump for energy harvesting applications
    (2012) Abdelaziz S.; Radwan A.G.; Eladawy A.; Mohieldin A.N.; Soliman A.M.; Electronics and Electrical Communication Department; Faculty of Engineering; MSA University; Egypt; Engineering Mathematics Department; Faculty of Engineering; Cairo University; 12613; Cairo; Egypt; Electronics and Electrical Communication Department; Faculty of Engineering; Cairo University; Egypt
    Threshold voltage cancellation (Vt cancellation) scheme is applied to cancel the threshold drop associated with the diode-connected device and improve charge pump performance. Applying this scheme depends on generating control signals from the next stage so it cannot be applied on the output stage. In this paper Vt cancellation is applied for the output stage of modified Pelliconi pump. This is done by adding an extra circuit that establishes the controlling signals necessary for the auxiliary circuit of the output stage. This modification in the output stage leads to increasing the whole pump power efficiency and voltage gain. Also the pump output equivalent resistance is improved. The proposed charge pump is more suitable for energy harvesting applications due to its ability to give more gain at low voltage levels. � 2012 IEEE.
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    Performance Evaluation of RZF Precoding in Multi-User MIMO Systems
    (Institute of Electrical and Electronics Engineers Inc., 2019) Saleeb B.; Shehata M.; Mostafa H.; Fahmy Y.; Electronics and Communications Engineering Department; MSA University; Giza; 15525; Egypt; Electronics and Communication Engineering Department; Cairo University; Giza; 12613; Egypt; Center for Nano-electronics and Devices Zewail City for Science and Technology; Giza; 12588; Egypt
    In this paper, the transmission performance of the downlink of linearly precodied multi-user multiple input-multiple output (MIMO) systems is investigated. The zero forcing (ZF), regularized ZF (RZF) and minimum mean squared error (MMSE) precoding schemes are considered, and the bit error rate (BER) is adopted as the performance metric of interest. Simulation results indicate that, an adequate BER performance is achieved by the proper control of the design parameters of RZF precoding. Moreover, a relationship between the number of users' antennas and the BS is observed, such that an adequate BER performance is achieved. 2019 IEEE.