Vectors Modulation for Nine-Switch Converters Seyed Mohammad Dehghan Dehnavi‚ Student Member‚ IEEE‚ Mustafa Mohamadian‚ Member‚ IEEE‚ Ali Yazdian‚ Member‚ IEEE‚ and Farhad Ashrafzadeh‚ Senior Member‚ IEEE Abstract—Recently‚ nine-switch inverter and nine-switch-zsource inverter have been proposed as dual output inverters. In this paper‚ the space vector modulation (SVM) of nine-switch inverter and nine-switch-z-source inverter is proposed. The proposed method increases the sum of modulation indices
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Research Journal of Applied Sciences‚ Engineering and Technology Research Article Digital Simulation of Space Vector Modulation Based Induction Motor Drive K.Vijaya Bhaskar Reddy* ‚ Research Scholar‚ Andhra University‚ waltair‚ A.P‚ India vijayabhaskarareddy.k@bvrit.ac.in‚ G.V. Siva Krishna Rao‚ Professor‚ Dept. of Electrical Engineering‚ Andhra University waltair‚ A.P‚ India‚ gvskrishna_rao@yahoo.com T.S.Surendra ‚Principal‚Dept of Electrical and Electronics Engineering‚BVRIT‚Narsapur‚Medak
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Richard Powers’ “Modulation” is about a mysterious‚ unhackable music virus that is taking over and controlling the minds of the people it comes in contact with. Out of nowhere this virus comes about and starts to spread vigorously through cyberspace‚ eating up computer software systems around the world. Not only is this virus spreading to computer systems and to data bases‚ but it starts spreading through people’s minds. Toshi‚ Marta‚ Jan‚ and Mitchell are the main characters in this story and all
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(IJERA) ISSN: 2248-9622 www.ijera.com Vol. 3‚ Issue 2‚ March -April 2013‚ pp.401-409 Twisted Amplitude Phase Shift Keying ABSTRACT Several modulation techniques are defined in digital modulation‚ Here we are discussing about in four modulation techniques‚8-PSK‚8-TAPSK‚16TAPSK and 16-QAM. In the paper we derive minimum non coherent distance(dnc)of block coded TAPSK and compare it with different modulation techniques‚ i.e. 8-PSK and 16-QAM using linear component codes. If the block length N is very
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1) Amplitude Shift keying (ASK) ASK is a modulation technique that related with amplitude of carrier wave being altered or modulated by information signal. When binary ‘1’ is appeared‚ the signal is transmitted and it is stopped when binary ‘0’ is appeared. The binary ‘0’ and ‘1’ are represented the shifting value between the two selected amplitude. 2) Frequency Shift Keying (FSK) FSK is a modulation technique that related with the frequency shifting or changes of carrier signal to transmit the
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Advanced Modulation Techniques for Power Converters by Ali Mehrizi-Sani A Thesis submitted to the Faculty of Graduate Studies of The University of Manitoba in partial fulfilment of the requirements of the degree of Master of Science Department of Electrical and Computer Engineering University of Manitoba Winnipeg‚ Manitoba Copyright c 2007 by Ali Mehrizi-Sani Acknowledgement Submission of this thesis marks a milestone in my academic career. After 18 years of schooling‚ there
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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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| ****Discuss briefly the influence of body language‚ voice modulation‚audience awareness and presentation plan for successful oral presentation?ORAL PRESENTATION SKILLS : Body language | **What is body language? | -- Eye contact‚ facial expressions‚ posture‚ movements‚ gestures.Why is it useful? It is natural and a part of communication. to clarify meaning; it is very visual to vent nervousness to maintain interest to emphasize The golden rule is "Be natural and relaxed!" |
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PSS is chosen from a class of the polyphase Zadoff- Chu (ZC) sequences [2‚ 3]‚ which satisfy a Constant Amplitude Zero Autocorrelation (CAZAC) property. A ZC sequence is a complex-valued mathematical sequence which exhibits the useful property that cyclically shifted versions of it is orthogonal to each other. The sequence used for the primary synchronization signal is generated from a frequency-domain ZC sequence according to the equation‚ N ZC u ZC = e πun n+1 NZC −j ; n = 0‚1‚2 ... ‚ N ZC − 1
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A Voltage-Controlled Oscillator (VCO) is a circuit that provides a varying output signal (typically of square-wave or triangular-wave form) whose frequency can be adjusted over a range controlled by a dc voltage. An example of a VCO is the 566 IC unit‚ which contains circuitry to generate both squarewave and triangular-wave signals whose frequency is set by an external resistor and capacitor and then varied by an applied dc voltage. Figure (1) shows that the 566 contains current sources to charge
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