Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

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

What functions does the internal security consultant

What functions does the internal security consultant perform, and what are the key qualifications and requirements for the position? What is the rationale for acquiring professional credentials? List and describe the cer ...

You receive a computer system from the officer who tagged

You receive a computer system from the officer who tagged and bagged the evidence at a crime scene in a suspects home. You examine the computer and discover that is uses SCSI (small computer system interface) drive on Wi ...

Advanced problem there are ways to improve the

Advanced problem!) There are ways to improve the square-and-multiply algorithm, that is, to reduce the number of operations required. Although the number of squarings is fixed, the number of multiplications can be reduce ...

1 list four types of delays in a packet-switched network2

1. List four types of delays in a packet-switched network. 2. In Figure 18.10, assume that the link between R1 and R2 is upgraded to 170 kbps and the link between the source host and R1 is now downgraded to 140 kbps. Wha ...

Compare and contrast routers switches and wireless access

Compare and contrast Routers, Switches and Wireless access points. Define each and explain how each would be interconnected in a network. Draw a network diagram illustrating how each device would be used to hook up a sma ...

1 draw a diagram to show the use of a proxy server that is

1. Draw a diagram to show the use of a proxy server that is part of the client network: a. Show the transactions between the client, proxy server, and the target server when the response is stored in the proxy server. b. ...

1 mention the three auxiliary protocols at the network

1. Mention the three auxiliary protocols at the network layer of the TCP/IP suite that are designed to help the IPv4 protocol. 2. In an IPv4 datagram, the value of the header-length (HLEN) field is (6)16. How many bytes ...

Using the internet search for commercial idps systems what

Using the Internet, search for commercial IDPS systems. What classification systems and descriptions are used, and how can these be used to compare the features and components of each IDPS? Create a comparison spreadshee ...

1 open the netlogo flocking model from the biology section

1. Open the NetLogo Flocking model from the Biology section of the models library, which shows emergent rules for generating bird flocks. Can you add a predator bird that changes the other birds ' behavior? 2. Choose any ...

Functions and excel tasks please respond to the following

"Functions and Excel Tasks" Please respond to the following: Identify three (3) Microsoft Excel 2013 functions that you believe to be the most useful within the application. Next, describe one (1) way in which you would ...

  • 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