1. 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.

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    $\begingroup$ I'm sorry I can't understand your question and some of the English expressions. Could you please rewrite it? $\endgroup$ – VMMF Mar 23 '18 at 4:57
  • $\begingroup$ nominate a book explains waves propagating from mobile user to another. its form and process between mobile device and user then through mobile network until reach user in the other side. $\endgroup$ – Ahmad Ali Abo Omar Mar 23 '18 at 7:45
  • $\begingroup$ Can I please ask you to edit this question with more information rather than starting a new one about the same topic? I think that if you give a little bit of attention to the way the question is written you would get more useful answers. Do you want me to help you with this or would you rather edit the question yourself first? $\endgroup$ – A_A Mar 23 '18 at 11:55

It seems that you are looking for books to learn about multiple topics. Skimming through your question I think these are the topics:

  1. Aspects of signals (signal mean, its power,amplitude,frequency,etc )
  2. Signals propagation in space or any other medium

I would recommend parts of the following books :

  1. Bernard Sklar - Digital Communications Fundamentals and Applications 2nd Edition
  2. Bruce Carlson - Communications Systems 4th Edition
  3. Simmon Haykin - Communication Systems 4th Edition
  4. John G. Proakis - Digital Communications 4th Edition

A little bit more deep:

  1. D.G.Manolakis - Statistical and Adaptive Signal Processing - Spectral Estimation, Signal Modeling, Adaptive Filtering and Array Processing
  2. Fuqin Xiong - Digital Modulation Techniques 2nd edition



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