Introduction
With the improvements in semiconductors optical free space communication has become n attractive alternative to existing signal conducts as fibre or wireless (RF). It offers high data rates and is much less expensive than underground fibre. But there are a few restrictions, which may mean it remains an alternative. Many engineers are familiar with one of two successful existing technologies for data communication: (1) Guided wave (e.g. fibre optics) and (2) wireless free space communication (e.g. RF). Fibre optics offers extremely ....etc

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Smart Transmitters And Receivers For Under Water Communication
Underwater Free space optical communication promising alternative for Short range links. Considered to be point to point. New optical front end proposed the concept of smart transmitters and receivers. Smart Receivers is capable of detecting angle of arrival of signals. Smart transmitters electronically steers output beam towards particular direction. Estimates water quality from back scattered light.

Advantages are non mechanical pointing and tracking on a moving underwater veh ....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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To get full information or details of smart transmitters and receivers for underwater free space optical communication please have a look on the pages

http://seminarsprojects.net/Thread-optical-space-communication-or-free-space-optical-communication-fso

if you again feel trouble on smart transmitters and receivers for underwater free space optical communication please reply in that page and ask specific fields in smart transmitters and receivers for underwater free space optical communication ....etc

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pls can you send me the ppt for smart transmitters and receivers for optical free space under water communication as i have a presentation tomorrow.hope you would do the needful ....etc

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to get information about the topicfree space optical communication circuits full report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-optical-space-communication-or-free-space-optical-communication-fso

http://seminarsprojects.net/Thread-free-space-optics-seminars-report ....etc

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Wireless Electronic Notice Board with Multi Point Receivers
using RF Communication System

IEE Reference:
Highly Reliable RF Communication System for point to multi point
communication
Vangala, S. Pishro-Nik, H.
Univ. of Massachusetts, Amherst


ABSTRACT
Notice Board is primary thing in any institution / organization or public
utility places like bus stations, railway stations and parks. But sticking various
notices day-to-day is a difficult process. A separate person is required to take
care of this ....etc

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i need this ppt in pdf format & powerpoint presentation pls send to me mail:
[email protected] ....etc

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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 through space rather than being guided through an optical cable. These beams of li ....etc

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smart transmitters and receivers for under water communicationppt

Abstract

The number of unmanned vehicles and devices deployed underwater is increasing. New communication systems and networking protocols are required to handle this growth. Underwater free-space optical communication is poised to augment acoustic communication underwater, especially for short-range, mobile, multi-user environments in future underwater systems. Existing systems are typically point-to-point links with strict pointing and tracking requirements. In this paper we ....etc

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