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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pooja raju
Ppt of OPTICAL OFDM FOR HIGH SPEED WIRELESS OPTICAL COMMUNICATION
how to prepare ppt on this seminar topic? ....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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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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Abstract
Improved space time coding for multiple-input and multiple-output orthogonal frequency division multiplexing is studied for wireless systems using QPSK modulation for four transmit and four receive antennas. A 256-state code is shown to perform within 3 dB of outage capacity (and within 2 dB with perfect channel estimation), which is better than any other published result without using iterative decoding. ....etc

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hi.can u plz send me the ppt of space-time block coding for spatial modulation?? ....etc

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

http://seminarsprojects.net/Thread-optical-communications-in-space--3821

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

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

http://seminarsprojects.net/Thread-underwater-optical-communication

http://seminarsprojects.net/Thread- ....etc

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please go through the following threads for more details

http://seminarsprojects.net/Thread-deep-space-communication
http://seminarsprojects.net/Thread-optical-communication
....etc

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