Homework Help is Here – Start Your Trial Now!
Engineering
Electrical Engineering
૧૩ In a digital telephony network, the signal of human voice needs to be sampled and digitized before transmission. It is found that limiting the bandwidth of human voice to 3000 Hz would be enough to ensure good-quality phone calls. a. Human voice contains frequency components above 3000 Hz. How can we ensure that the voice signal will only occupy a bandwidth of 3000 Hz? b. The sampling rate is determined to be 50% higher than the Nyquist sampling rate. Determine the sampling rate. c. A pulse-code modulation (PCM) scheme is used to represent the digitized voice signal, where 10 bits are used for each sample. Determine the data rate of a single voice call.

૧૩ In a digital telephony network, the signal of human voice needs to be sampled and digitized before transmission. It is found that limiting the bandwidth of human voice to 3000 Hz would be enough to ensure good-quality phone calls. a. Human voice contains frequency components above 3000 Hz. How can we ensure that the voice signal will only occupy a bandwidth of 3000 Hz? b. The sampling rate is determined to be 50% higher than the Nyquist sampling rate. Determine the sampling rate. c. A pulse-code modulation (PCM) scheme is used to represent the digitized voice signal, where 10 bits are used for each sample. Determine the data rate of a single voice call.

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...
See similar textbooks
icon
Related questions
icon
Concept explainers
Question

Help answer these questions, much appreciated 

૧૩ In a digital telephony network, the signal of human voice needs to be sampled and digitized before transmission. It is found that limiting the bandwidth of human voice to 3000 Hz would be enough to ensure good-quality phone calls. a. Human voice contains frequency components above 3000 Hz. How can we ensure that the voice signal will only occupy a bandwidth of 3000 Hz? b. The sampling rate is determined to be 50% higher than the Nyquist sampling rate. Determine the sampling rate. c. A pulse-code modulation (PCM) scheme is used to represent the digitized voice signal, where 10 bits are used for each sample. Determine the data rate of a single voice call. d. Time-division multiplexing (TDM) is used to aggregate a maximum of 40 voice calls in a telephone line. Determine the maximum data rate that you can observe over a telephone line. e. Determine the minimum required bandwidth of the telephone line that can support a maximum of 40 phone calls. f. Explain what synchronization is in a TDM system and why do we need synchronization in a TDM system. g. Now, suppose a frequency division multiplexing (FDM) system is to be built to support 40 phone calls in a given geographic area, where a single sideband amplitude modulation scheme (SSB AM) with a sufficiently large carrier frequency is used for each phone call. What is the minimum required bandwidth for the FDM system that can avoid mutual interference among the phone calls?
Transcribed Image Text:૧૩ In a digital telephony network, the signal of human voice needs to be sampled and digitized before transmission. It is found that limiting the bandwidth of human voice to 3000 Hz would be enough to ensure good-quality phone calls. a. Human voice contains frequency components above 3000 Hz. How can we ensure that the voice signal will only occupy a bandwidth of 3000 Hz? b. The sampling rate is determined to be 50% higher than the Nyquist sampling rate. Determine the sampling rate. c. A pulse-code modulation (PCM) scheme is used to represent the digitized voice signal, where 10 bits are used for each sample. Determine the data rate of a single voice call. d. Time-division multiplexing (TDM) is used to aggregate a maximum of 40 voice calls in a telephone line. Determine the maximum data rate that you can observe over a telephone line. e. Determine the minimum required bandwidth of the telephone line that can support a maximum of 40 phone calls. f. Explain what synchronization is in a TDM system and why do we need synchronization in a TDM system. g. Now, suppose a frequency division multiplexing (FDM) system is to be built to support 40 phone calls in a given geographic area, where a single sideband amplitude modulation scheme (SSB AM) with a sufficiently large carrier frequency is used for each phone call. What is the minimum required bandwidth for the FDM system that can avoid mutual interference among the phone calls?
Expert Solution
steps

Step by step

Solved in 2 steps with 1 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Thermistors
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Fundamentals of Electric Circuits
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:
9780078028229
Author:
Charles K Alexander, Matthew Sadiku
Publisher:
McGraw-Hill Education
Electric Circuits. (11th Edition)
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:
9780134746968
Author:
James W. Nilsson, Susan Riedel
Publisher:
PEARSON
Engineering Electromagnetics
Engineering Electromagnetics
Electrical Engineering
ISBN:
9780078028151
Author:
Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:
Mcgraw-hill Education,
SEE MORE TEXTBOOKS