ECE 22X: Book Errata

ECE 22X: Errata in Signals and Systems, 2nd Ed., Haykin & Van Veen

Page 32: Figure e for example (e) has the wrong labels on the time axis. The y-axis is also labelled incorrectly. It should also be labelled "x(2(t-1)) = x(2t-4)".
Page 36: In the first paragraph there is a reference to Eq. (1.30) which should be Eq. (1.31).
Page 38: The smallest number on the vertical axis of Figure 1.33 should be -1, not 0 as shown.
Page 49: In (1.69) there is an extra set of parentheses around the differential dt. It should just be dt, not d(t).

Page 63: In Problem 1.33 they use the notation x(n) instead of x[n], as they do throughout the rest of the book.
Page 103: Figure 2.3(c) is a little misleading because the value of w_5[k] at time k=5 appears to have a value less than one, when the actual value of the signal at that time is 1.
Page 114: The last part of the solution for part (c) of problem 2.2 should state that y[n] = 0 for n >= 24, not n<=24 as shown.

Page 203: The solution to Example 3.2 states that the signal has odd symmetry, but it doesn't actually have either even or odd symmetry.
Page 208: In the bottom of Figure 3.10 it appears that the phase isn't odd because X[9] = X[-9] = pi. However, this is just an artifact of the way the phase was drawn. If X[-9] had been drawn as -pi, which is equal to a phase of pi, then the phase would have appeared visually to be odd as well.
Page 296: Equation (3.58) shows a the relationship of multiplication in the time domain and convolution in the frequency domain for the CTFS, not the FT as indicated abouve the double-sided arrow in the equation.
Page 324: Problem 3.51e uses the DTFS coefficients in figure P3.51b, but the amplitude of the coefficients was not specified. All of the non-zero coefficients should have unit amplitude, |X[k]| = 1 for |k| < 5.

Pg. 345: The right side of equation (4.5) and the preceding unumbered equation should be multiplied by 2pi, as shown in (4.6).

Revised 5.30.06