25-06-2012, 12:25 PM
LASER COMMUNICATION SYSTEM
[attachment=25387]
ABSTRACT:
LASER COMMUNICATION SYSTEMS ARE WIRELESS CONNECTIONS THROUGH THE ATMOSPHERE.THIS TYPE OF COMMUNICATION WORKS ON THE PRINCIPLE OF “LINE OF SIGHT”.A LASER IS SIMILAR TO A NORMAL LIGHT,WHICH ACTUALLU MEANS..
L-LIGHT
A-AMPLIFICATION BY
S-STIMULATED
E-EMISSION OF
R-RADIATION.
LASER COMMUNICATION CAN BE EASILY DEPLOYED SINCE THEY ARE INEXPENSIVE,SMALL,LOW POWER AND DO NOT REQUIRE ANY RADIO INTERFERENCE STUDIES.
THE DESIGN:
THE DESIGN SHOWN ABOVE IS THE BASIC MODEL FOR THE LASER COMMUNICATION.IT CONSISTS OF A TRANSMITTER(TO TRANSMIT THE SIGNAL) AND A RECEIVER(TO OBTAIN THE TRANSMITTED SIGNAL).THE TRANSMITTER HERE CONSISTS OF..
1.A/D:FOR INSTANCE LET THE INPUT GIVEN TO TRANSMITTER BE A VOICE SIGNAL,THE VOICE SIGNAL IS NOTHING BUT A SPEECH SIGNAL WHICH IS AN ANALOG SIGNAL.SO,IN ORDER TO CONVERT THIS ANALOG SIGNAL INTO A DIGITAL ONE,WE USE A/D CONVERTER.
2.MCU-MULTIPOINT CONTROL UNIT
IT IS USED TO CONTROL OR MANAGE THE DATA AMONGST THE TWO POINTS.IT TAKES THE OUTPUT FROM THE A/D AND TRANSFERS IT TO THE UART.
3.UART-UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER
A UART IS THE MICROCHIP WITH PROGRAMMING THAT CONTROLS A COMPUTER’S INTERFACE TO ITS ATTATCHED SERIAL DEVICES. SPECIFICALLY,IT PROVIDES THE COMPUTER WITH THE RS-232C DATA TERMINAL EQUIPMENT(DTE) INTERFACE SO THAT IT CAN TALK TO AND EXCHANGE DATA WITH MODEMS AND OTHER SERIAL DEVICES.
[attachment=25387]
ABSTRACT:
LASER COMMUNICATION SYSTEMS ARE WIRELESS CONNECTIONS THROUGH THE ATMOSPHERE.THIS TYPE OF COMMUNICATION WORKS ON THE PRINCIPLE OF “LINE OF SIGHT”.A LASER IS SIMILAR TO A NORMAL LIGHT,WHICH ACTUALLU MEANS..
L-LIGHT
A-AMPLIFICATION BY
S-STIMULATED
E-EMISSION OF
R-RADIATION.
LASER COMMUNICATION CAN BE EASILY DEPLOYED SINCE THEY ARE INEXPENSIVE,SMALL,LOW POWER AND DO NOT REQUIRE ANY RADIO INTERFERENCE STUDIES.
THE DESIGN:
THE DESIGN SHOWN ABOVE IS THE BASIC MODEL FOR THE LASER COMMUNICATION.IT CONSISTS OF A TRANSMITTER(TO TRANSMIT THE SIGNAL) AND A RECEIVER(TO OBTAIN THE TRANSMITTED SIGNAL).THE TRANSMITTER HERE CONSISTS OF..
1.A/D:FOR INSTANCE LET THE INPUT GIVEN TO TRANSMITTER BE A VOICE SIGNAL,THE VOICE SIGNAL IS NOTHING BUT A SPEECH SIGNAL WHICH IS AN ANALOG SIGNAL.SO,IN ORDER TO CONVERT THIS ANALOG SIGNAL INTO A DIGITAL ONE,WE USE A/D CONVERTER.
2.MCU-MULTIPOINT CONTROL UNIT
IT IS USED TO CONTROL OR MANAGE THE DATA AMONGST THE TWO POINTS.IT TAKES THE OUTPUT FROM THE A/D AND TRANSFERS IT TO THE UART.
3.UART-UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER
A UART IS THE MICROCHIP WITH PROGRAMMING THAT CONTROLS A COMPUTER’S INTERFACE TO ITS ATTATCHED SERIAL DEVICES. SPECIFICALLY,IT PROVIDES THE COMPUTER WITH THE RS-232C DATA TERMINAL EQUIPMENT(DTE) INTERFACE SO THAT IT CAN TALK TO AND EXCHANGE DATA WITH MODEMS AND OTHER SERIAL DEVICES.