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

1 design and implement a program to solve the n-queens

1. Design and implement a program to solve the n-queens problem. Your program should prompt the user for the size of the board, search for a solution, and print the resulting board if a solution was found. 2. Instead of ...

1 what is the most common form of violation of intellectual

1. What is the most common form of violation of intellectual property? How does an organization protect against it? What agencies fight it? 2. What are the various types of force majeure? Which type might be of greatest ...

Identifying purposes and characteristics of

Identifying Purposes and Characteristics of Processors Identifying Purposes and Characteristics of Memory How to Disassembling and Reassembling Laptops. How to Installing and Configuring Expansion Cards What are the diff ...

1 using your security lab as your fictitious company

1. Using your security lab as your fictitious company, develop a disaster plan for the lab. 2. Study vendor tools in disaster recovery. Write about five of them, listing their merits and costs involved. 3. Study and deve ...

An important property of sorting algorithms is stability a

An important property of sorting algorithms is stability. A sorting algorithm is stable if it preserves the original order of duplicate keys. Stability is important when sorting a collection that has already been sorted ...

Describe the difference between procedural programming and

Describe the difference between procedural programming and object-oriented programming?

1 what is separation of duties how can it be used to

1. What is separation of duties? How can it be used to improve an organization's information security practices? 2. What is job rotation, and what benefits does it offer an organization?

The postscript language 11 describes page layout for

The PostScript language [11] describes page layout for printers. Among its features is the ability to request that the interpreter execute commands on the host system. a. Describe a danger that this feature presents when ...

Computing modular exponentiation efficiently is inevitable

Computing modular exponentiation efficiently is inevitable for the practicability of RSA. Compute the following exponentiations xe mod m applying the squareand-multiply algorithm: After every iteration step, show the exp ...

Cpsc programthis is the programwrite a class to represent a

CPSC Program This is the program Write a class to represent a dynamically sized array of integers. Name it DynArray. submit: a file named dynarray.h that contains all of your class code Class specifications: Private data ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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