14-09-2012, 11:37 AM
Wireless Communication
PPT ON WIRELESS COMMUNICATION.ppt (Size: 971.5 KB / Downloads: 190)
Introduction
In 1895, Guglielmo Marconi opened the way for modern wireless communications by transmitting the three-dot Morse code for the letter ‘S’ over a distance of three kilometers using electromagnetic waves.
From this beginning, wireless communications has developed into a key element of modern society.
From satellite transmission, radio and television broadcasting to the now ubiquitous mobile telephone, wireless communications has revolutionized the way societies function.
WIRELESS COMMUNICATION
Wireless communication is the transfer of information over a distance without the use of electrical conductors
or "wires“.
The distances involved may be short (a few meters as in television remote control) or
long (thousands or millions of kilometers for radio communications).
When the context is clear, the term is often shortened to "wireless".
Wireless communication is generally considered to be a branch of telecommunications.
History
The term "Wireless" came into public use to refer to a radio receiver or transceiver, establishing its usage in the field of wireless telegraphy early on…
Now the term is used to describe modern wireless connections such as in cellular networks and wireless broadband Internet.
It is also used in a general sense to refer to any type of operation that is implemented without the use of wires,
such as "wireless remote control" or "wireless energy transfer",
regardless of the specific technology that is used to accomplish the operation.
ELECTROMAGNETIC SPECTRUM
Light, colors, AM and FM radio and electronic devices make use of the electromagnetic spectrum
In the US the frequencies that are available for use for communication are treated as a public resource and are regulated by the Federal Communications Commission
This determines which frequency ranges can be used for what purpose and by whom.
COMPUTER INTERFACE DEVICES
Usb, pen drives and bluetooth devices
Originally units used bulky,highly limited transceivers to mediate between a computer and a keyboard and mouse,
Recent generation have used small,high quality devices some even incorporating “BLUETOOTH”
CONCLUSION
By using wireless communication we can easily transfer the data because it is portable
Reliable
Lightweight
And cheap in cost
PPT ON WIRELESS COMMUNICATION.ppt (Size: 971.5 KB / Downloads: 190)
Introduction
In 1895, Guglielmo Marconi opened the way for modern wireless communications by transmitting the three-dot Morse code for the letter ‘S’ over a distance of three kilometers using electromagnetic waves.
From this beginning, wireless communications has developed into a key element of modern society.
From satellite transmission, radio and television broadcasting to the now ubiquitous mobile telephone, wireless communications has revolutionized the way societies function.
WIRELESS COMMUNICATION
Wireless communication is the transfer of information over a distance without the use of electrical conductors
or "wires“.
The distances involved may be short (a few meters as in television remote control) or
long (thousands or millions of kilometers for radio communications).
When the context is clear, the term is often shortened to "wireless".
Wireless communication is generally considered to be a branch of telecommunications.
History
The term "Wireless" came into public use to refer to a radio receiver or transceiver, establishing its usage in the field of wireless telegraphy early on…
Now the term is used to describe modern wireless connections such as in cellular networks and wireless broadband Internet.
It is also used in a general sense to refer to any type of operation that is implemented without the use of wires,
such as "wireless remote control" or "wireless energy transfer",
regardless of the specific technology that is used to accomplish the operation.
ELECTROMAGNETIC SPECTRUM
Light, colors, AM and FM radio and electronic devices make use of the electromagnetic spectrum
In the US the frequencies that are available for use for communication are treated as a public resource and are regulated by the Federal Communications Commission
This determines which frequency ranges can be used for what purpose and by whom.
COMPUTER INTERFACE DEVICES
Usb, pen drives and bluetooth devices
Originally units used bulky,highly limited transceivers to mediate between a computer and a keyboard and mouse,
Recent generation have used small,high quality devices some even incorporating “BLUETOOTH”
CONCLUSION
By using wireless communication we can easily transfer the data because it is portable
Reliable
Lightweight
And cheap in cost