Ask Question, Ask an Expert


Ask Computer Engineering Expert

problem 1: What factors should be considered when choosing a digital encoder (line codes)? Briefly illustrate five of those factors. Use sketches and additional text to describe the following encoding techniques: NRZ-L, Bipolar-AMI, Manchester, HDB3, B8ZS and 4B/5B. Your explanation of each technique should comprise the encoding rule, advantages and disadvantages. No mathematical equations are necessary.

problem 2: A modified NRZ code known as enhanced-NRZ (E-NRZ) operates on 7-bit words; inverting bits 2,3,6 and 7; and adding one parity bit to each word. The parity bit is selected to make the total number of 1s in the 8-bit word an odd count. What are the advantages of E-NRZ over NRZ? Are there any disadvantages?

problem 3: Why should a modem be used to transmit binary data via a PSTN?

(A) Use sketches and additional text to describe the given modulation methods.

(a) Amplitude shift keying.

(b) Frequency shift keying.

(B) Discuss the factors that influence the choice of carrier frequency and the bandwidth used by the demodulator section of a modem.

problem 4: Data is to be transmitted using a modem at 9600 bps. Determine the minimum bandwidth of the system with the following modulation methods (a) FSK (b) ASK. Use the excess bandwidth factor r = 0:5. Compare ASK and BFSK in terms of transmission bandwidth
for a constant data rate.

problem 5: Find the Nyquist rate for the following signals:

(a) x(t) = 5 sin 3000πt cos 4000πt

(b) x(t) = (sin 500πt)/(πt)(c) x(t) = [(sin 300πt)/(πt)]2

The binary channel with bit rate 36000 bps is available for PCM voice transmission. Find out appropriate values of the sampling rate, the number of quantizing levels, and the binary digits, supposing a maximum frequency of 3.2 kHz.

problem 6: An analog information signal, whose maximum frequency is 6000Hz, is to be transmitted by using a PCM system. The quantization error should not exceed the ±1 % of the peak-to-peak analog signal.

(a) Determine the minimum number of bits per sample or bits per PCM word that must be used in this system?

(b) Determine the minimum required sampling rate, and what is the resulting bit rate?

(c) Determine the PCM pulse or symbol transmission rate?

problem 7: A PCM system uses 8 bits per sample and the analog signal is limited to 4.3 kHz. The PCM data is transmitted using (a) BFSK and (b) ASK. Determine the bandwidth required for transmission in each case. Assume that r = 0:55.

problem 8:

(a) Consider a sinusoidal signal m(t) = Acos(2πfmt) applied to a delta modulator with step size Δ. Find out the range of the step size so that slope overload will be avoided. Suppose that delta modulation (DM) system is designed to operate at 3 times the Nyquist rate of the input signal. The quantizing step size is 250 mV. Find out the maximum amplitude of a 1-kHz input sinusoid for which the delta modulator doesn't show slope overload.

Computer Engineering, Engineering

  • Category:- Computer Engineering
  • Reference No.:- M91387

Have any Question? 

Related Questions in Computer Engineering

The ietf internet protocol performance metrics ippm working

The IETF Internet Protocol Performance Metrics (IPPM) working group develops standard metrics that can be applied to the quality, performance, and reliability of a network. How could this group's work help a network desi ...

1 in tcp can the sender window be smaller larger or the

1. In TCP, can the sender window be smaller, larger, or the same size as the receiver window? 2. Can you mention some tasks that can be done by one or a combination of TCP segments? 3. In a TCP segment, what does a seque ...

Discuss four of the differentiators and also four ramp

Discuss four of the Differentiators and also Four RAMP Components. You  essay should include examples for each differentiator / Ramp component discussed. Submission Instructions: Your completed essay must be submitted as ...

Assignmentselect a task that a program could perform over

Assignment Select a task that a program could perform over an array of items that would be used by a small business. Your task must include the following: • Declaring array • Populating the array • Processing the items i ...

Alabama life and casualty insurance corporation specializes

Alabama Life and Casualty Insurance Corporation specializes in underwriting commercial farm policies throughout the southern United States. The company's chief information officer has become increasingly concerned that o ...

Io accesses oft en have a large impact on overall system

I/O accesses oft en have a large impact on overall system performance. Calculate the CPI of a machine using the performance characteristics above, assuming a non-virtualized system. Calculate the CPI again, this time usi ...

1 for a system without a dmz where is the best area in the

1. For a system without a DMZ, where is the best area in the network to install a honeypot? 2. Why are honeypots important to a network? Discuss the disadvantages of having a honeypot in the network. 3. Discuss three app ...

This problem concerns a traffic light placed on a stretch

This problem concerns a traffic light placed on a stretch of road where there is no cross traffic, but where pedestrians often cross. There are two sets of lights, one facing each direction of traffic, and two pedestrian ...

Assume now that you have two friends that will help you

Assume now that you have two friends that will help you cook, and that you have a large oven that can accommodate all three cakes. How will this change the schedule you arrived at in Exercise 6.2.1 above? Exercise 6.2.1 ...

1 ftp uses the services of tcp for exchanging control

1. FTP uses the services of TCP for exchanging control information and data transfer. Could FTP have used the services of UDP for either of these two connections? Explain. 2. In FTP, which entity (client or server) start ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen