blast effect damage on buildings

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A Technique for Orthogonal Frequency Division Multiplexing
Frequency Offset Correction

Abstract:
The Orthogonal Frequency Division Multiplexing (OFDM) is a Multi Carrier Modulation technique employing Frequency Division Multiplexing of orthogonal subcarriers. It is also sometimes called as discrete multitone modulation (DMT). It is better than CDMA in high bit rate and Broadband Communications .It is a multi carrier technique, which is very sensitive to Frequency Offset between transmitter and receiver. Th ....etc

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Definition
The explosive growth of both the wireless industry and the Internet is creating a huge market opportunity for wireless data access. Limited Internet access, at very low speeds, is already available as an enhancement to some existing cellular systems. However those systems were designed with purpose of providing voice services and at most short messaging, but not fast data transfer. Traditional wireless technologies are not very well suited to meet the demanding requirements of providing very high data rates with the ubiquity, mobili ....etc

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INTRODUCTION

The explosive growth of both the wireless industry and the Internet is creating a huge market opportunity for wireless data access. Limited internet access, at very low speeds, is already available as an enhancement to some existing cellular systems. However those systems were designed with purpose of providing voice services and at most short messaging, but not fast data transfer. Traditional wireless technologies are not very well suited to meet the demanding requirements of providing very high data rates wi ....etc

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ABSTRACT

In wire less transmission the radio waves do not simply propagate from transmit to receive antenna, but bounce and scatter randomly off objects in the environment. This scattering is known as multipath as it results in multiple copies of transmitted signals, arriving at the receiver via different scattered paths. In conventional wireless systems, multipath represents a significant impediment to accurate transmission, because the images arrive at the receiver at slightly different times and can thus interfere destructively, canceling ....etc

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The explosive growth of both the wireless industry and the Internet is creating a huge market opportunity for wireless data access. Limited internet access, at very low speeds, is already available as an enhancement to some existing cellular systems. However those systems were designed with purpose of providing voice services and at most short messaging, but not fast data transfer. Traditional wireless technologies are not very well suited to meet the demanding requirements of providing very high data rates with the ubiquity, mobility and porta ....etc

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Introduction
An electrical power system is very complex. It needs some form of switchgear in order that it may be safely and efficiently controlled or regulated under both normal and abnormal operating conditions.
Circuit breaker is an automatically operated electrical switch.
It protects an electrical circuit from damage caused by overload and short circuit.
Its basic function is to detect a fault condition and, by interrupting continuity, to immediately discontinue electrical flow.
Unlike a fuse, which ope ....etc

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The Abrasiive Blast Cleaning is the cleaning of the surface by the action of granular abrasives propelled either by compressed air through a nozzle or by using a vaned hardened steel blast wheel.Abrasive Blast Cleaning provides a method of surface preparation that is rapid and well established. Blast cleaning in its purest sense,relies primarily on mechanical forces(rather then chemical) to achieve cleaning performance.To blast clean,some form of media needs to be directed and ?blasted? via some method of delivery,towards a surface.The mechanis ....etc

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ABSTRACT
BLAST is a wireless communications technique which uses multi-element antennas at both transmitter and receiver to permit transmission rates far in excess of those possible using conventional approaches.
In wireless systems, radio waves do not propagate simply from transmit antenna to receive antenna, but bounce and scatter randomly off objects in the environment. This scattering known as multipath, as it results in multiple copies (images) of the transmitted sign arriving at the receiver via diff ....etc

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