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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Advantages of digital communication system over analog communication system
Communication systems
 The block diagram on the top shows the blocks common to all communication systems
Remember the components of a communications system:
 Input transducer: The device that converts a physical signal from source to an electrical, mechanical or electromagnetic signal more suitable for communicating
 Transmitter: The device that sends the transduced signal
 Transmission channel: The physical medium ....etc

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The Robot control using the wireless communication and the serial communication



Executive Summary
The NASA Robotics Alliance Cadets Program is being designed to be implemented at a
very low start-up cost, and to make this goal obtainable, the program is being developed
using low to no cost components from already developed, well-tested and robust
engineering testbeds.
In this project we are trying to establish both wireless communication between the mob ....etc

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1. Device communication using USART protocol
2. Fire alert communication system
3. Industrial safety alert system using LAN
4. Network based staff caller system
5. Secure Access Control using WEIGAND RF-ID.
6. Network based weather Plotting system
7. Networking enabled Industrial Automation.
8. Embedded Networking for Industrial Monitoring and Control with VI Interface.
9. PC-to-PC Wire less Data communication using IR\Laser \ Fiber Optics
10. Device Control and Data Monitoring through Power Line Communication.
11. I2C Protocol implem ....etc

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transmitter circuit diagram, receiver circuit diagram. and documentation. ....etc

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seminarsonly
Sky X Technology
INTRODUCTION
Satellites are ideal for providing internet and private network access over long distance and to remote locations. However the internet protocols are not optimized for satellite conditions and consequently the throughput over the satellite networks is restricted to only a fraction of available bandwidth. We can over come these restrictions by using the Sky X protocol.
The Sky X Gateway and Sky X Client/Servers systems replaces TCP over satellite page link with a protocol opti ....etc

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1. Reliable Adaptive Modulation and Interference Mitigation for Mobile Radio Slow Frequency Hopping Channels
2. End-to-End BER Analysis for Dual-Hop OSTBC Transmissions over Raleigh Fading Channels
3. Low-Complexity Localized Walsh Decoding For CDMA Systems
4. Frequency Offset Estimation for MB-OFDM-based UWB Systems
5. Design and Analysis of Bit Interleaved Coded Space-Time Modulation
6. Performance Analysis of Iterative Channel Estimation and Multiuser Detection In Multi path DS-CDMA Channels
7. Training Signal Design for Estimation o ....etc

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Embedded Based Accident Alert
SEND THIS SEMINAR TOPIC
....etc

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transmitter circuit and receiver circuit diagram for optical communication based counter. and documentation ....etc

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