Problem 9.5. The message signal of Problem 9.2 having a bandwidth W of 4 kHz is transmitted over the same noisy channel having a noise spectral density N0/2 of 2x10-17 watts per hertz using single-sideband modulation. If the average received power of the signal is -80 dBm, what is the post-detection signal-to-noise ratio of the receiver? Compare the transmission bandwidth of the SSB receiver to that of the DSB-SC receiver. Solution From Eq. (9.23) 2 SSB post 0 SNR 2 cA P N W = with 2 80 dBm 2 cA P = − , , and . The 4 kHzW = 170 104 −×=N SSB postSNR 18 dB= The transmission bandwidth of SSB is 4 kHz, half of the 8 kHz used with DSB-SC. Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes only to students enrolled in courses for which the textbook has been adopted. Any other reproduction or translation of this work beyond that permitted by Sections 107 or 108 of the 1976 United States Copyright Act without the permission of the copyright owner is unlawful.