SATELLITE‚ MOBILE AND PERSONAL COMMUNICATION ASSIGNMENT =CONTENTS= PROBLEM NUMBER PAGE NUMBER 1 3 2 5 3 7 4 8 5 10 3.30 12 3.31 14 3.32
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Ae 4!f 2 Ae G= 2 = 2 " c • • • • • G = antenna gain Ae = effective area f = carrier frequency c = speed of light (≈ 3 x 108 m/s) λ = carrier wavelength Propagation Modes Ground-wave propagation Sky-wave propagation Line-of-sight propagation Ground Wave Propagation Ground Wave Propagation Follows contour of the earth Can Propagate considerable distances Frequencies up to 2 MHz Example o AM radio Sky Wave
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Control Theory and Informatics ISSN 2224-5774 (print) ISSN 2225-0492 (online) Vol 1‚ No.1‚ 2011 www.iiste.org RFID Based Automatic Shopping Cart Ankit Anil Agarwal (Corresponding Author) Computer Engineering‚ D.Y.P.C.O.E.‚Akurdi‚ Pune‚ India Tel: +91-9881104860 E-mail: 3aaankit@gmail.com Saurabh Kumar Sultania Computer Engineering‚ D.Y.P.C.O.E.‚Akurdi‚ Pune‚ India Tel: +91-8055367456 E-mail: saurabhsultania@gmail.com Gourav Jaiswal Computer Engineering‚ D.Y.P.C.O.E.‚Akurdi‚ Pune‚ India Tel:
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toggle the amount of power consumed by them at several workloads. But these features are not adopted by the Database Managements Systems which are one of the sources of large energy consumption. This report shows two techniques called Process Voltage/Frequency Control (PVC)‚ Explicit Query Delays (QED) for trading energy efficiency into database systems with their experimental
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QUARTER 2007‚ VOLUME 9‚ NO. 2 www.comsoc.org/pubs/surveys CHANNEL ESTIMATION FOR WIRELESS OFDM SYSTEMS MEHMET KEMAL OZDEMIR‚ LOGUS BROADBAND WIRELESS SOLUTIONS‚ INC. AND HUSEYIN ARSLAN‚ UNIVERSITY OF SOUTH FLORIDA ABSTRACT Orthogonal frequency division multiplexing (OFDM) is a special case of multi-carrier transmission and it can accommodate high data rate requirement of multimedia based wireless systems. Since channel estimation is an integral part of OFDM systems‚ it is critical to
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pharmaceutical industries. RFID Radio-frequency identification (RFID) is the wireless noncontact use of radio-frequency electromagnetic fields to transfer data‚ for the purposes of automatically identifying and tracking tags attached to objects. Some tags require no battery and are powered and read at short ranges via magnetic fields (electromagnetic induction). Others use a local power source and emit radio waves (electromagnetic radiation at radio frequencies). The tag contains electronically stored
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current‚ in use‚ biochip implant system is actually a fairly simple device. Today’s‚ biochip implant is basically a small (micro) computer chip‚ inserted under the skin‚ for identification purposes. The biochip system is radio frequency identification (RFID) system‚ using low-frequency radio signals to communicate between the
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MSc Strategic Business IT An investigation into the use of Radio Frequency Technology (RF) for Rahimafrooz’s client in order to reduce inventory errors at Rahimafrooz group‚ Bangladesh. By Rehana Khanam Page:1 Table of Contents: ABSTRACT AND KEY LIST ..............................................................................................................4 LIST OF FIGURES .......................................................................................................
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communications for Wal-Mart. The VMS has the ability to send two way text messages to assist management in being more effective in the material handling of resources to the most appropriate destinations. The VMS also works effectively with Radio-Frequency Identification (RFID) systems.
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A REPORT ON AUTOMATION OF CONVERTOR TILTING DRIVE USING PLC AND VVVF DRIVES Abstract: Industry is a home of various kinds of machines that are used for numerous processes and treatments. The control and working of these machines have been automated through the use of PLCs. Automation has resulted in faster production rate‚ increased accuracy‚ better quality and reduced faults and human errors. PLCs and VVVF drives are used in most of the sections and units at VISL because of their simple methods
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