Professor De Boer's list of
TEXTBOOK ERRATA
(last update 4/07/2023)
Proakis and Salehi
Fundamentals of Communication Systems, 2nd Edition.
ISBN-13: 978-0-13-335485-0. ISBN-10: 0-13-335485-7.
Pearson Prentice Hall, 2014.
(Link to errata for the first edition.)
The following errata have been found:
Page 29, Example 2.1.7Replace "A/2" with just "A" in four places.
Page 42, Equation 2.1.42
Replace the symbol
(script "L") with the symbol 
(script "T") in every instance.
(Three replacements)
Page 78, Some electronic editions of the textbook only,
Fourier transform of the sin function has a sign error
The correct transform is
(Posted 11/16/2020)
Page 101, Problem 2.5 parts 3 and 4
Replace parentheses with square braces. The corrected text is. . .
3. sin[4000πt] + cos[11,000πt]
4. sin[4000πt] + cos[11,000t]
(Eight replacements)
(Posted 1/20/2014)
Page 102, Problem 2.6 part 5
Change Part 5 of this problem from. . .
"x5(t) = x1(t) – x2(t), where x1(t) is even and x2(t) is odd"to. . .
"x5(t) = xa(t) – xb(t), where xa(t) is an even function and
xb(t) is an odd function"
(The authors do not intend to refer back to parts 1 and 2 of this problem. They instead wish to refer to any general even and odd pair of functions. Also, the subtraction sign in this problem statement is not an error.)
Updated 1/7/2014.
Page 105, Problem 2.28.
The lower limit of the integral should be t – T
In a few printings and in some electronic editions of this textbook this lower limit incorrectly has a plus sign in it.
(Posted 9/08/2020)
Page 151-152, Problems 3.1, 3.2, 3.3, 3.5, 3.6.
In each of these problems, when the authors mention, "DSB" they mean, "DSB-SC."
Page 154, Electronic Edition only: Problem 3.14.
In the second line of the problem statement change "180" to "1800."
The corrected line is
u(t) = 5cos(1800πt) + 20cos(2000πt) + 5cos(2200πt)
(Posted 4/07/2023)
Page 163, Figure 4.2
The plot in the row labeled "FM Signal" and in the right-hand half of that row is just plain wrong. Ignore it. A corrected version of Figure 4.2 can be found here. (posted 3/24/2016, updated 11/01/2017)
Page 182, Problem 4.2.
Part two has a typo (fd should be kf) but also there is an amgiguity of units. Replace part (2) with this question:
2. If phase modulation is used with kp = 1 rad/V what is the maximum
instantanious frequency? Similarly, if frequency modulation is used with
kf = 1 Hz/V what is the maximum instantanious frequency? In each case
let the carrier frequency be fc and express the maxiumum frequency as this
variable plus a certain amount.
(posted 12/04/2019)
Page 186, Problem 4.16.
The units on the peak frequency deviation are incorrectly given.
Replace "Hz/v" with "Hz".
Page 187, Problem 4.20.
Replace "fIF < fLO" with "fC < fLO."
(Alternatively, and better fitting to the context, replace with "fLO > fC.")
(posted 4/13/2016)
Disclaimer: This list of errata is provided by Professor De Boer for the use of his students in his courses. Professor De Boer has no connection to the book's publisher or the authors of the textbook. This list is offered as is, with no guarantee of any kind. (This list is likely to be incomplete at the least.)
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