Question: Mobile Computing Assignment Is a directional antenna useful for mobile phones? Why? How can the gain of an antenna be improved? What are the main

Mobile Computing Assignment

  1. Is a directional antenna useful for mobile phones? Why? How can the gain of an antenna be improved?
  2. What are the main problems of signal propagation? Why do radio waves not always follow a straight line? Why is reflection both useful and harmful?
  3. Why, typically, is digital modulation not enough for radio transmission? What are general goals for digital modulation? What are typical schemes?

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