18-02-2010, 12:48 PM
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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 they require legal procedure to be installed they are confined to some frequencies and the bandwidth become a scarce recourse
¢ They can be intercepted by other users and communication can result non secure
WHAT DO WIRELESS INFRARED COMMUNICATION OFFER
¢ They neither produce,nor are affected by EM interferences,so they can be used in EM restricted scenarios and in others in which interferences are present now
¢ They do not require legal procedures to be installed so you have all the bandwidth you can manage
¢ There are well established commercial devices and standards offering good performance
¢ They can be intercepted but it is not easy to accessdata without detection and even without codification
UOWC
It is URBAN OPTICAL WIRELESS COMMUNICATION
The UOWC terminal includes an optical transmitter and a receiver positioned,several hundred meters
ADVANTAGES OF UOWC
RAPID DEVELOPMENT
LIGHT WEIGHT
HIGH CAPACITY COMMUNICATION WITHOUT LICENSING FEES AND TARIFFS
WHY INFRARED FOR MEDICAL APPLICATIONS
The standardisation of communication processes that has led to the explosion of tele communication products in the consumer area has yet to take hold in the world of clinical medicine
IT standards within the commercial application domain are inadequate to fully address the needs of the clinical IT domain especially in the patients bed side
RF system has got security and operation problems
ON BOARD APPLICATIONS
¢ ON BOARD systems for cable replacement on satellites
¢ Weight considerations
¢ Robustness on rocket launching
CONCLUSION
¢ UWB is to assume much of the nowadays applications of wireless optical systems
¢ MANY OF THE SCENARIOS are held by very conservative organisations such as hospitala,nuclear administrations and changes are delayed to the state of art in communications
¢ Optical system have an opportunity on cheap in house and ad-hoc sensor internet working
