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Homework Help: PAM is not very good for long-distance transmission. Why is it so?

  1. Mar 24, 2010 #1
    1. The problem statement, all variables and given/known data

    Just came across the statement that PAM is not very good for long-distance transmission.
    Why is it so?
    Thanks.

    2. Relevant equations


    3. The attempt at a solution

    Is it because the output is of infinite length?
     
    Last edited: Mar 24, 2010
  2. jcsd
  3. Mar 25, 2010 #2
    what the heck is pam and what class is this for? (is it for applied electromagnetics with an intro to transmission line theory?)
     
  4. Mar 25, 2010 #3
    Ops.

    PAM = pulse amplitude modulation
    for digital communication.
     
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