pooja raju
Ppt of OPTICAL OFDM FOR HIGH SPEED WIRELESS OPTICAL COMMUNICATION
how to prepare ppt on this seminar topic?
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OPTICAL COMMUNICATION




INTRODUCTION

Today's telecommunications service providers are faced with what appears to be an insoluble problem. They must maintain and even increase profitability, while responding to an exponential growth in demand with networks that are even more complex and costly to deploy and maintain.
Since the requirements for both profitability and the ability to offer new, revenue-rich services are givens, the solution must be found in the networ ....etc

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Presented By:
WIRELESS OPTICAL COMMUNICATION
Adicherla Jayakar,4th B.E, E.C.E Raja Harsha Vardhan,4th B.E, E.C.E
Deccan College of Engg & Tech, Hyderabad, A.P


ABSTRACT
This paper deals with the Wireless Optical Communication (WOC). In this paper we mainly discuss the problems with the conventional methods of communication such as Permissions, License fees, Lack of International standardization, Wastage of power and Security and how this new technology of WOC can be used to overcome these problems, ....etc

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CHAPTER 1
INTRODUCTION

Communication links between space crafts is an important element of space infrastructure, particularly where such links allow a major reduction in the number of earth stations needed to service the system. An example of an inter orbit page link for relaying data from LEO space craft to ground is shown in the figure below



Interorbit page link for relating data from LEO spacecraft to ground

Fig. 1
Inter orbit page link for relaying data from LEO space craft to ground.


The above figure represents a ....etc

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WIRELESS OPTICAL COMMUNICATION

Wireless OPTICAL COMMUNICATION is suitable for wireless home links because:
¢ Wide bandwidth is available for an optical carrier and is suitable for high speed transmission
¢ The optical devices are small and low in cost.Thus they can simplify the structure of transmitters and receivers
¢ The optical wireless network needs no license

There are certain scenarios in which RF signals are not suitable because:
¢ They produce and are affected by EM interferences
¢ As ....etc

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hi i would like to get details about laser satellite communication ....etc

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Optical Fiber Communications


1.0 Introduction of Optical Fiber Communications

Our current age of technology is the result of many brilliant inventions and discoveries, but it is our ability to transmit information, and the media we use to do it, that is perhaps most responsible for its evolution. Progressing from the copp cable, our increasing ability to transmit more information, more quickly and over longer distances has expanded the boundaries of our technological development in all areas. ....etc

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ABSTRACT
Satellite crosslinks generally require narrower bandwidths for
increased power concentration. We can increase the power concentration
by increasing the cross page link frequency with the same size antenna. But
the source technology and the modulation hardware required at these
higher frequency bands are still in the development stage. Use of
optical frequencies will help to overcome this problem with the
availability of feasible light sources and the existence of ....etc

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http://freespaceopticsfreespaceoptics/images/flightstrata_photo.jpg
Free space optical communications is a line-of-sight (LOS) technology that transmits a modulated beam of visible or infrared light through the atmosphere for broadband communications. In a manner similar to fiber optical communications, free space optics uses a light emitting diode (LED) or laser (light amplification by stimulated emission of radiation) point source for data transmission. However, in free space optics, an energy beam is collimated and transmitted t ....etc

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INTRODUCTION
The ocean covers some 70% of our planet and is a rich fund of information on global health, climate change, and resource degradation. Studying marine ecosystems, ensuring port security, and monitoring oil pipelines and leaks of hazardous materials in transit are some of the specific reasons for profiling the concentration and distribution of substances in the ocean.
Considerable research has been conducted to develop and assess methods of sensing the ocean on spatial and temporal scales ranging fr ....etc

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