Errata for first printing (corrected in second printing) ---------------------------------------------------------------------- p. 18, Problem 4: delete "Think about this question. It will be answered in Chapter 3." ---------------------------------------------------------------------- p. 48, second full paragraph: replace "... every seventh period contains eight samples." with "... every seventh period contains 58 samples." ---------------------------------------------------------------------- p. 49, second full paragraph: replace "Next, observe that our square wave is odd about the center of each period. That is, if we shift the signal so that it's centered at the half-period point, t = T/2, the resulting signal is also odd. Now sine waves at the odd harmonics have this property, but the sine waves at even harmonics are even about the midperiod point." with "Next, observe that our square wave is even about the center of each half-period. That is, if we shift the signal so that it's centered at the center of a half-period, say at t = T/4, the resulting signal is even. Now sine waves at the odd harmonics have this property, but sine waves at the even harmonics are odd about the quarter-period point." ---------------------------------------------------------------------- p. 64, Eq. 2,7: replace H(\omega) = ... with |H(\omega)| = ... ---------------------------------------------------------------------- p. 105, second full paragraph: replace "... because now the round-trip time is L instead of 2L.) with "... because now the round-trip time is 2L instead of 4L.) ---------------------------------------------------------------------- p. 162, Eq. 6.7: insert x_{2m+1} in second summation ---------------------------------------------------------------------- p. 163, second full paragraph: replace "... because the summations X_k^{even} and O_k^{odd} ..." with "... because the summations X_k^{even} and X_k^{odd} ..." ---------------------------------------------------------------------- p. 169, Fig. 9.1: the lonely point 133 with ordinate 60.2 dB was inadvertantly ommited, but is now present and indicated with an arrow ---------------------------------------------------------------------- p. 172, Problem 15(b): replace "Show that R^2 = I, the identity matrix." with "Show that R^2 = N^2 I, where I is the identity matrix." ---------------------------------------------------------------------- p. 216, Problem 7: replace ... - 0.5 cos(2 \pi t (n-1)) + ... with ... - 0.5 cos(2 \pi t / (n-1)) + ... p. 216, Problem 8: remove parentheses around (n-1) (three instances) and append "where n is odd." ---------------------------------------------------------------------- p. 238, Problem 2: replace "... the other two for the usual kinds of signals processing?" with "... the others for the usual kinds of signal processing?" ---------------------------------------------------------------------- Further (not yet corrected): p. 45, caption of Fig. 1.2, in (b) and (c) for "half" read "twice" p. 112, the peaks in Fig. 5.1 are off -- the figure mistakenly uses L=5 instead of L=32 (Thanks to Herbert J. Zipper) p. 131, same mistake as on p. 49 above p. 231, line after Eq. 6.1: weird $\times$ symbol p. 232, Eq. 6.4: replace (t-k) on the right-hand side by (t-kT) p. 312, index: Moore, F. R., 17, 307, 133 Moorer, J. A., 291-295, 306, 307, 308 ----------------------------------------------------------------------