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A modem is connected to a 4,800 bit/s data terminal. Assuming that a 50-percent roll-off pulse shaping is used for all cases, calculate the required transmission bandwidth BT at the modem output for each of the following schemes: a) Frequency-shift keying (FSK) transmission with a frequency deviation of +- 3,600 Hz around the carrier frequency. b) Amplitude-shift keying (ASK) transmission

A modem is connected to a 4,800 bit/s data terminal. Assuming that a 50-percent roll-off pulse shaping is used for all cases, calculate the required transmission bandwidth BT at the modem output for each of the following schemes: a) Frequency-shift keying (FSK) transmission with a frequency deviation of +- 3,600 Hz around the carrier frequency. b) Amplitude-shift keying (ASK) transmission

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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A modem is connected to a 4,800 bit/s data terminal. Assuming that a 50-percent roll-off pulse shaping is used for all cases, calculate the required transmission bandwidth BT at the modem output for each of the following schemes:

a) Frequency-shift keying (FSK) transmission with a frequency deviation of +- 3,600 Hz around the carrier frequency.

b) Amplitude-shift keying (ASK) transmission

c) 16-level quadrature amplitude modulation (QAM)

Which scheme is the optimum modulation for this transmission?

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Digital Modulation Scheme (Amplitude-Shift Keying [ASK], Phase-Shift Keying [PSK], Frequency-Shift Keying [FSK])
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