Homework Assignment 2

Answer the following questions (some are from the book) and submit your answers as a pdf file in your dropbox in a subdirectory called "homeworks". Name the file hw2.pdf and make sure to include your name in the document. Homework assignments are to be solved independently! The deadline for this assignment is 11.59pm on October 11th. No late submissions will be accepted!

  • Comparing ASK with PSK, which one, in your opinion, is more susceptible to interferences, making it more likely to mis-interpret received signals? Explain your answer.
  • We briefly mentioned "line-of-sight" (LOS) and "non-line-of-sight" (NLOS) in class and it is important to have a basic understanding of what this means. Try to answer the following questions and feel free to use online resources to find the answers:
    • What is the basic relationship between frequency and LOS/NLOS (i.e., compare low and high frequency transmissions)?
    • LOS transmissions are very popular with cell phone communications, etc. How can it then be that you can use your cell phone even when surrounded by skyscrapers?
    • Are signals coming from GPS satellites LOS or NLOS? Explain the consequences.
  • Exercise 6.3 in the book.
  • Exercise 6.4 in the book.
  • Exercise 6.5 in the book.
  • Exercise 6.9 in the book.
  • Exercise 6.13 in the book.