4.4 Quadrature phase shift keying (QPSK) Quadrature phase shift keying (QPSK) has twice the bandwidth efficiency of BPSK since two bits are transmitted in a single modulation symbol. In the phase of the carrier takes on one of four equally spaced values‚ such as 0‚ π/2‚π and 3π/2‚ where each value of phase corresponds to a unique pair of message bits. The Quadrature phase shift keying (QPSK) signal for this set of symbol states may be defined as s_QPSK (t) =√(〖2E〗_s/T_s ) cos[〖2πf〗_c t +(i-1)π/2]
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Juiimul lit MuiiagL-mcni )992‚Vi>!. IK. No. 3‚ . ’52.1-545 A Causal Model of Organizational Performance and Change W. Warner Burke Teachers College‚ Columbia University George H. Litwin The Graduate Center To provide a model of organizational performance and change‚ at least two lines of theorizing need to be explored—orgatiizational ftuictioning and organizational change. The authors go beyond description and suggest causal linkages that hypothesize how performance is affected and how effective
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observing the second order system to the input step signal and then relating it to the damping ratio of the specific second order system. The third and most important objective of this experiment was to use different functions of LabVIEW including loop execution control‚ LabVIEW formula node‚ LabVIEW graph‚ LabVIEW Waveform functions and LabVIEW express Vis. Theory: The dynamics of a linear system can be represented through linear derivative equations. The representative equation of a first
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major control strategies discussed in this paper are: peak current‚ average current mode and borderline current control. These strategies are implemented in MATLAB/SIMULINK and the performance of the proposed converter is compared under open loop and closed loop operation. From the results‚ the input current waveform was close to sinusoidal implying high power factor and reduced harmonics for borderline control. Keywords- Bridgeless IBC‚ THD‚ Power Factor & ‚ Current Control Techniques I. INTRODUCTION
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found at a crime scene is analyzing the blood. In the genetics laboratory the person who contributes I would say is Alec Jeffreys as he is known as the father of genetic profiling. 2. Forensic Scientists examine tiny fingerprint details. These may be loops‚dots‚ forks‚ islands. Several comparison points must be perfectly matched for two fingerprints to be considered identical 3. Edward Foster studied fingerprint analysis in the US and introduced it to Canada. In 1911‚ Foster testified as a fingerprint
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Table of Contents Objective – Chapter 1 1 1.0 INTRODUCTION TO ELECTRICAL CIRCUITS 2 Basic Quantities and Units in Electrical 2 Quantities 2 Units 3 Factors Affecting Resistance 4 Length of the Conductor: 4 Area of Cross-Section of the Conductor: 4 Electrical Resistivity of Substances 5 Effect of Temperature 5 Components of Electrical Circuits 6 Components of an Electric Circuit 7 Measuring Current‚ Voltage and Resistance 8 Measuring voltage 8 Measuring current 9 Measuring
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PASSPORT AUTOMATION SYSTEM Objective: To develop a mini project for Passport Automation System using Rational Rose‚ SmartDraw‚ MS Access and Visual Basic‚ Problem Statement: The Passport Application System for Indian Nationals is being automated with a user-friendly interface and a strong back-end support. Every citizen of India who wishes to apply for his/her passport has to create a personal login account by registering himself/herself at first. From thereon‚ he/she can access the
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TOPIC 6: GLOBAL WARMING GHG gases: Carbon dioxide Water vapor Methane Function: they allow short wavelengths of radiation to pass through the Earth‚ but they trap the longer wavelengths that are radiated from the earth. (Greenhouse effect) Greenhouse effect The GHGs allow short wavelengths of radiation to pass thought the Earth’s surface. It regulates the Earth’s temperature keeping conditions warmer than without the effect and more hospitable to life. Examples of greenhouse gases
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Electro-hydraulics Basic level D. Merkle • K. Rupp • D. Scholz Order no.: Description: Designation: Edition: Graphics: Layout: Editor: Authors: Translator: 093611 E.-HYDR.LEHRB. D.LB-TP601-GB 4/92 A. Reulecke 16.6.93‚ C. Paproth‚ M. Schwarz A. Zimmermann D. Merkle‚ K. Rupp‚ D. Scholz T. Tranter © Copyright by Festo Didactic KG‚ D-73734 Esslingen‚ 1994 All rights reserved‚ including translation rights. No part of this publication may be reproduced or transmitted
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lead compensator is implemented to reduce the percentage of peak overshot to less than 5% and the settling time to 2 second with 2% accuracy. First of all‚ to implement lead compensators into a circuit‚ a pole–zero pair is introduced into the open loop transfer function. Lead compensator is a component in a control system that improves an undesirable frequency response in a feedback and control system. Besides that‚ it also provides phase lead in its frequency response. Lead compensator also helps
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