I want to understand what actually happens when some data is sent over a particular frequency/channel. My understanding is that to send data on a particular channel, a ripple is created in the medium with the corresponding frequency. Not sure how the receiver accepts the info from the channel.
In: Technology
Your question is about radio transmission in general. In the beginning, like your car radio receives analog signals through either Amplitude Modulation (AM Radio) or Frequency Modulation (FM Radio). In your terms, the “medium” is a particular Radio channel and the way the signal is transmitted is through either making your “ripples” higher and lower (Amplitude) or making them closer together or further apart (Frequency) and the receiver simply makes a speaker vibrate in sync with the vibrations that were transmitted in one of those ways, not entirely unlike a record making a needle vibrate as it travels around the groove and picks up the analog info that was originally carved into it.
Now we are in a digital age and the way data gets transmitted is much much more complex that not only involves *both* amplitude and frequency modulation but also simultaneously operates on multiple channels to create quadrature phase shifting and advances are constantly being made that can allow more and more dense data to be encoded into radio waves.
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