A Newbie's Guide to Wireless Networks
How a basic radio works
The most common experience that most people have with RF is their AM/FM radio (or their television sets). Shown above is a diagram that briefly shows how a radio works. Try gliding your mouse over each of the components.
Letís start with the transmitter or radio station where the RF signal originates.
As for the receiver, your AM/FM radio or television set, just turn the process around.
Wireless Data Operation
So, how does this change for sending and receiving wireless data? Very simply, the source is a computer instead of audio. The destination is also a computer or computer network instead of a speaker. The signal is encoded and decoded using more exotic digital modulation formats like Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM), and others. The radio frequency bands that are used are different as determined by the FCC. And the maximum allowable transmission power is also restricted. Otherwise, it is all pretty much the same.
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