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Data at a bit rate R must be transmitted using either binary NRZ polar signaling or 8-ary PAM NRZ polar signaling. (a) By what factor will the symbol rate be reduced in the 8-PAM case? (b) By what factor will bandwidth required from the lowpass channel be reduced in the 8-PAM case? (c) Assuming the minimum spacing between pulse levels must be the same in both cases, by what factor will the average power be increased in the 8-PAM case? [Hint: take the pulse amplitudes to be +A in the binary case, and ±4, +34, +54, +74, and recall that scaling pulse amplitude by a factor k scales the pulse energy by a factor ². Assume that the data is random, so that all 8 levels are equally likely, and that the same pulse shape is used in both cases.]

Data at a bit rate R must be transmitted using either binary NRZ polar signaling or 8-ary PAM NRZ polar signaling. (a) By what factor will the symbol rate be reduced in the 8-PAM case? (b) By what factor will bandwidth required from the lowpass channel be reduced in the 8-PAM case? (c) Assuming the minimum spacing between pulse levels must be the same in both cases, by what factor will the average power be increased in the 8-PAM case? [Hint: take the pulse amplitudes to be +A in the binary case, and ±4, +34, +54, +74, and recall that scaling pulse amplitude by a factor k scales the pulse energy by a factor ². Assume that the data is random, so that all 8 levels are equally likely, and that the same pulse shape is used in both cases.]

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Data at a bit rate R, must be transmitted using either binary NRZ polar signaling or 8-ary PAM NRZ polar signaling. (a) By what factor will the symbol rate be reduced in the 8-PAM case? (b) By what factor will bandwidth required from the lowpass channel be reduced in the 8-PAM case? (c) Assuming the minimum spacing between pulse levels must be the same in both cases, by what factor will the average power be increased in the 8-PAM case? [Hint: take the pulse amplitudes to be ±A in the binary case, and ±4, +34, +54, +74, and recall that scaling pulse amplitude by a factor k scales the pulse energy by a factor k2². Assume that the data is random, so that all 8 levels are equally likely, and that the same pulse shape is used in both cases.]
Transcribed Image Text:Data at a bit rate R, must be transmitted using either binary NRZ polar signaling or 8-ary PAM NRZ polar signaling. (a) By what factor will the symbol rate be reduced in the 8-PAM case? (b) By what factor will bandwidth required from the lowpass channel be reduced in the 8-PAM case? (c) Assuming the minimum spacing between pulse levels must be the same in both cases, by what factor will the average power be increased in the 8-PAM case? [Hint: take the pulse amplitudes to be ±A in the binary case, and ±4, +34, +54, +74, and recall that scaling pulse amplitude by a factor k scales the pulse energy by a factor k2². Assume that the data is random, so that all 8 levels are equally likely, and that the same pulse shape is used in both cases.]
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