CHAPTER 1 — BASIC RADAR PRINCIPLES AND GENERAL CHARACTERISTICS INTRODUCTION The word radar is an acronym derived from the phrase RAdio Detection And Ranging and applies to electronic equipment designed for detecting and tracking objects (targets) at considerable distances. The basic principle behind radar is simple - extremely short bursts of radio energy (traveling at the speed of light) are transmitted‚ reflected off a target and then returned as an echo. Radar makes use of a phenomenon
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as small as a single room with walls that block radio waves or as large as many square miles — this is achieved by using multiple overlapping access points. Cellular most often associated with wireless phones‚ a cellular network uses connected transmitters‚ or cells‚ that enable the user to move about while remaining in contact with the network. Cells transmit at low power levels so as not to interfere with each other and may be spaced far apart in rural areas or close together in cities. Bluetooth
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terrain. The radar dish or antenna transmits pulses of radio waves or microwaves which bounce off any object in their path. The object returns a tiny part of the wave’s energy to a dish or antenna which is usually located at the same site as the transmitter. Radar was secretly developed by several nations before and during World War II. The term RADAR was coined in 1940 by the United States Navy as an acronym for RAdio Detection And Ranging.[1] The term radar has since entered English and other languages
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Emergency Response Team): 1. How to make our project waterproof? Answer: Put the project on a High place or secure it with a glass case 2. What are we going to do to improve our project? Answer: Secure the transmitter in a glass case‚ the alarm sound will be centralized‚ Transmitter should have back-up‚ and receiver should be kept in a building. Every room in the school must hear the alarm/the alarm should be centralized. Recess alarm and emergency alarm must be different. 3. What are
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Abstract: VLSI based Accident information and car security system deals with the concern of saving the victim ‚ who get trapped in accident and also about the car security. Accident of the car is detected using pressor sensors which are fixed in car. Accident information to the nearest hospital is carried out with the help of RF communication. The location of the car is found using the GPS technique. The security of car is ensured by using password. The theft information is sent to the owner’s mobile
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| [hide] | |1 Digital QAM | |2 Analog QAM | |2.1 Fourier analysis of QAM | |3 Quantized QAM | |3.1 Ideal structure | |3.1.1 Transmitter | |3.1.2 Receiver | |4 Quantized QAM performance | |4.1 Rectangular QAM | |4.1.1 Odd-k QAM | |4.2 Non-rectangular QAM | |5 Interference and
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and Elocution at the Boston University. These interests once again lead him to invent the microphone with help from Watson and he achieved it through experiments with a water transmitter‚ using an acid-water mixture and Bell spoke the famous sentence "Mr. WatsonCome hereI want to see you" into the liquid transmitter while Watson was listening at the receiving end hearing the words clearly. Bell’s "electrical speech machine" which we now call telephone‚ was made in 1876. News of his invention
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Asynchronous communication utilizes a transmitter‚ a receiver and a wire without coordination about the timing of just how long the transmiter leaves the signal at a certain level to represent a single digital bit. Each device uses a clock to mesure out the ’length’ of a bit. The transmitting device simply transmits. The receiving device has to look at the incoming signal and figure out what it is receiving and coordinate and retime its clock to match the incoming signal. Sending data encoded
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Zafar-ullah-Koreshi Page I Acknowledgement. Page II Table of Contents: Chapter 1: Introduction Page No.02 1.1 Basic Introduction Page No.03 1.2 Transmitter/Receiver Page No.04 1.3 Microcontroller Page No.05 1.4 Digital Gyroscope Page No.05 Chapter 2: Literature Review Page No.06 2.1 History Page No.07 Chapter 3: Modeling
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CS3282 Digital Comms 9.1 2 May’06 / BMGC Multi-level digital modulation & demodulation. 9.1. Introduction: So far‚ in looking at carrier modulated data transmission‚ we have concentrated mainly on binary signalling using simple forms of ASK‚ FSK and PSK. With a suitable pulse-shape‚ binary signalling can achieve a bandwidth efficiency of up to 2 bits/second per Hz using real unipolar pulses (base-band equivalent of ASK) or real bipolar pulses (base-band equivalent of PSK) at base-band.
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