# Question

In pulse- amplitude modulation (PAM), a PAM word consists of a sequence of pulses, where each pulse may take on a given number of amplitude levels. Suppose a PAM word is n pulses long and each pulse may take on m different levels.

(a) How many distinct PAM words are there?

(b) If each PAM word, 4 pulses long, is equally likely to occur and each pulse can have one of three levels, {0, 1, 2}, what is the probability of a PAM word occurring with exactly two pulses of level 2?

(a) How many distinct PAM words are there?

(b) If each PAM word, 4 pulses long, is equally likely to occur and each pulse can have one of three levels, {0, 1, 2}, what is the probability of a PAM word occurring with exactly two pulses of level 2?

## Answer to relevant Questions

A certain communication system transmits text messages by representing each character with an - bit binary codeword. Suppose it is necessary for this communication system to operate in such a way that there are always an ...In the game of blackjack, Aces are worth 11 points (or they can also be counted as 1 point, but for the sake of this problem, we will only count them as 11 points), 10s, Jacks, Queens, and Kings are all worth 10 points and ...We are in possession of two coins, one which is fairly balanced and turns up heads with probability 1/ 2, the other is weighted such that heads shows up with probability 3/ 4 and tails with probability 1/ 4. The two coins ...Suppose we modify the communications network of Example 2.22 as shown in the diagram by adding a link from node B to node D. Assuming each link is available with probability independent of any other link, what is the ...In a digital communication system, a block of data bits is mapped into an - bit codeword that typically contains the information bits as well as n – k redundant bits. This is known as an (n, k) block code. The redundant ...Post your question

0