- Where can I learn about signal's features. For instance mean, power, amplitude, frequency, energy, how they propagate in space or any other medium?.
What power means its amplitude increases and decreases to draw the sine wave form through a bit of time. at stable value (forming logical message) depending on medium resistance and transmitting signal power, human code model frequently repeated (hi) started with character ends with another completed word (world) another word stared with a header and ends with trailer completed word.
out of electricity network that it out of control compared with communication signals networks even both of them propagate as a flood of electrons in cables, i need to know its shape in a medium, MW or Electromagnetic waves or in cables. voice fades away at the moment you shot a word. you already carried it on a carrier to reach ear of who you talk to but at low power so that its power and frequency decreased and lose its shape at a point seems to be disappeared or absorbed to be converted to another shape of energy.
We carries it on a carrier varies depending on the medium converting carrier to cover all values voice reach as possible, more values means more quality. filtering the result to get carrier and voice met points.
just comments needed, books and papers.