They all using frequencies to transmit signals so how RF is transmitting analog and Bluetooth and Wifi digital signals ? And why transmitting analog signals over long distances is easier than bluetooth ?
In: Technology
They are all basically the same thing: electromagnetic transmissions. Which you can imagine as water waves. Big and small.
The first significant difference is the frequency of said waves. The lower the frequency, the easier it is to be ‘caught’ from a larger distance but also it sends less information per second
Radio works in ~ thousands of signal/seconds. BT around a few million, and WiFi, depending on the type, in thousand millions.
Second difference is encrypted. You want radio to be heard by everyone, so what you send is what the receiver receives.
With BT and WiFi, you want only specific devices to be able to read the messages. You pair the two devices and they both agree on a code to interpret the information. So if ‘over the air’ signal reads ‘hello’, the end device knows to interpret it as ‘house’.
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