NETWORKS UNIT I PHYSICAL AND WIRELESS MAC LAYER ALTERNATIVES PART – A (2 Marks) 1. Name five design consideration in selecting a modulation scheme for a wireless networks. 2. Why is out of band of radiation an important issue in designing modulation scheme? 3. Why is PPM used with IR communication instead of PAM? 4. Name four space diversity techniques. 5. What are the advantages of high efficiency voice band modems? 6. Draw the structure
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An Overview of Mobile WiMAX (IEEE802.16e-2005) Technology Abstract The increasing demands for high-speed mobile Internet access over the past few years have motivated the development of broadband wireless access technologies. Mobile WiMAX (based on IEEE 802.16e-2005 standard) provides a solution to meet the demands. This paper will present a high-level overview of the development of Mobile WiMAX and the key technologies involved in Mobile WiMAX. This paper will also address the future development
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DETAILED SYLLABI OF B.Tech DEGREE PROGRAMME IN ELECTRONICS AND COMMUNICATION ENGINEERING (Applicable from 2010 Admission onwards) DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING NATIONAL INSTITUTE OF TECHNOLOGY CALICUT 26 MA 1001: MATHEMATICS I L 3 T 1 P 0 C 3 Module 1 (12 hours) Preliminary Calculus : Partial differentiation‚ Total differential and total derivative‚ Exact differentials‚ Chain rule‚ Change of variables‚ Minima and Maxima of functions of
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Introduction: Now-a-days we are living in a technical era where almost all electrical products are functioning wirelessly. There are different types of protocol used for wireless communication. In this paper I am going describe about some wireless protocols use all over the world. At first we have to know what protocol is. And why it is important for communication pattern. Then I tell about drawbacks and finally there will be my assumption about different protocols. Description:
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Radio Broadcasting is familiar to everyone. We are all familiar with the simple task of turning on the radio‚ tuning to our favorite station and listening to news‚ traffic reports‚ weather forecasts‚ music and other programs. Radio broadcasting is defined as using radio waves to send transmissions to a large audience‚ who will listen to the transmission through a radio. The definition of radio broadcasting can be expanded by examining radio waves‚ radio transmitters and receivers.
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Chapter 3 review components of a neuron (i.e.‚ dendrites‚ axons‚ terminal buttons) dendrites A branched fiber that extends outward from the main cell body and carries information into the neuron. axon In a nerve cell‚ an extended fiber that conducts information from the soma to the terminal buttons. Information travels along the axon in the form of an electric charge called the action potential. terminal buttons Tiny bulblike structures at the end of the axon‚ which contain neurotransmitters
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International Journal of Electronics and Communication Engineering. ISSN 0974-2166 Volume 6‚ Number 1 (2013)‚ pp. 1-8 © International Research Publication House http://www.irphouse.com Comparision of 3G Wireless Networks and 4G Wireless Networks: 1 1 Arun Kumar‚ 2Suman and 3Renu Lecturer‚ ECE‚ Eiilm University‚ Jorethang‚ Sikkim 2&3 Perusing M.Tech.‚ HCTM College‚ Hrayana Abstract By examining the two papers on 4G and 3G‚ namely wireless networks: opportunities and challenges
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radio over fiber (RoF) technology has been proposed since it provides functionally simple BSs that are interconnected to a central control station (CS) via an optical fiber. It has the following main features: (1) it is transparent to bandwidth or modulation techniques‚ (2) simple and small BSs‚ (3) centralized operation is possible. Extensive research efforts have been devoted to the development of physical layer such as simple BS development and radio signal transport techniques over fiber‚ but few
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I. Introduction Global Positioning System or GPS is a navigation system that used satellites to navigate. GPS are used at most of the places such as‚ cars‚ aircrafts‚ ships‚ and mobile phone. Currently there are 31 GPS satellites orbiting Earth in 12 hours each. GPS help human activities in this world through navigating to safe more time‚ safeties in flight‚ to locate their locations for purposes like in military‚ etc. GPS plays important role in current human activities. II. History At the
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mode-locking is usually achieved by placing‚ inside the laser cavity‚ either an amplitude modulator‚ which produces a periodic modulation in time of the cavity loss‚ or a phase modulator‚ which periodically varies the optical length of the resonator. In lasers with upper-state lifetimes shorter than the cavity round-trip time‚ active mode-locking can also be achieved by periodic modulation of the laser gain at a repetition rate equal to the longitudinal mode separation
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