Chapter 1 Introduction 1.1 Introduction In the modern societies people are like to make their lives easier. Because their work load is grow-up. According to that situation the society has mostly moved to automated systems. There for we also thought to make an AUTOMATED SUPERMARKET SYSTEM as a helping system for supermarkets. In this chapter it gives basic knowledge and background factors about the project. In this section we kept our attention on the topics such as background and motivation
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Real world Applications of Electronics This chapter introduces some of the real world applications of Electronics; 1. Audio Systems 2. Radio Transmission & Reception 3. Control Systems 1. AUDIO SYSTEMS: Any system operating at audio frequencies (20 to 20‚000 Hz) is called an Audio System‚ e.g. an intercom‚ music systems etc. Following diagram (fig.1.1) shows the main features of such an audio system; FIGURE 1.1: Main blocks of an audio system 1.1 Radio tuner: It receives radio signals and converts
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CHAPTER 7 1. The ability of a receiver to choose a desired signal frequency while rejecting closely adjacent signal frequencies is known as selectivity. 2. Decreasing the Q of a resonant circuit causes its bandwidth to increase. 3. Good selectivity usually means narrow bandwidth. 4. True. A tuned circuit can provide voltage gain. 5. Cascading tuned circuits cause the selectivity to increase. 6. If the selectivity of a tuned circuit is too sharp‚ the sidebands of the received signal
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Thamil Paadanool (Draft Version) by Elango Cheran Pronouns / Simple Sentences Pronouns Singluar 1st Person 2nd Person Plural I ehd; eP ePq;fs; mtd; mts; mtu; mJ ehk; ehq;fs; ePq;fs; we (listener included) we (listener not included) you you (with respect) he she he/she (respect) it you 3rd Person mtu;fs; mit they they ("those things") Singular / Plural Singular means that a word refers to only 1 thing. Plural means that a word refers to more than 1 thing. 1st‚ 2nd‚ & 3rd Person First
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Channel Tracking in Wireless OFDM Systems Heiko Schmidt‚ Volker K¨ hn‚ and Karl-Dirk Kammeyer u University of Bremen‚ FB-1‚ P.O. Box 33 04 40‚ D-28334 Bremen‚ Germany‚ e-mail: schmidt@comm.uni-bremen.de and Reinhard R¨ ckriem and Stefan Fechtel u Infineon Technologies AG‚ P.O. Box 80 09 49‚ D-81609 Munich‚ Germany e-mail: reinhard.rueckriem@infineon.com Abstract— In the presented paper‚ the principle of frequency domain channel estimation for wireless OFDM systems will be shown. A well known noise
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Microwave Transmission Basics Microwave Transmission Basics Table of Contents • MW Advantages • MW Frequency bands • MW Link elements • Antenna Radiation Pattern • MW Alarms Microwave Transmission Basics Features Advantages Rapid Deployment – A microwave link can be installed in as little as one day No right-of-way issues – Radio spans all obstacles such as roads‚ railways‚ etc.‚ avoiding any requirement to seek permissions that inevitably are costly and introduce time delays
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Cis 505 Assignment 1: Standards Research Assignment 1: Wireless Data Transmission Name: Fabio M. Cesar Professor: Patricia White Course: Enterprise Wireless Networks Date: 01/17/2013 A radio signal is an electromagnetic wave propagated by an antenna. Radio waves have different frequencies‚ and by tuning a receiver’s radio at a specific frequency‚ you can pick up a signal‚ because the starting
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High Dynamic Carrier Tracking Using Kalman Filter Aided Phase-Lock Loop Weibin Li†‚‡‚ Shanjian Liu†‚‡‚ Chunhui Zhou‡‚ Shidong Zhou‡‚ Tingchang Wang† † Institute of Communication Engineering PLAUST Nanjing P‚ R China Email: liwb@wireless.mdc.tsinghua.edu.cn Abstract—Tracking dynamics on the GPS signal is still a big challenge to the receiver designer as the operating conditions are becoming more volatile. Usually‚ the Phase-locked loop (PLL) is used in GPS receivers to track
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NANO RADIO PRESENTED BY K.ROJA KUMARI CH.V.S.S.MADHURI B.TECH- ECE - III/IV B.TECH- ECE- III/IV SWARNANDHRA COLLEGE OF SWARNANDHRA COLLEGE OF ENGINEERING & TECHNOLOGY ENGINEERING & TECHNOLOGY E-mail:krojakumari99@gmail.com E-mail:sslmadhu99@gmail.com Abstract The nano radio is a remarkable break through
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The Hong Kong Polytechnic University EIE331: Communication Fundamentals File name: eie331 03am.pdf CONTINUOUS-WAVE MODULATION SCHEMES: AMPLITUDE MODULATION (AM) • Double sideband amplitude modulation (DSB) • Frequency spectrum and power relationships of the AM signal • Modifications of amplitude modulation: – Double sideband – suppressed carrier (DSB–SC) – Vestigial sideband modulation (VSB) – Single sideband modulation (SSB) • Frequency-division multiplexing (FDM) ´ G´za KOLUMBAN
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