Digital Communications 2

Оглавление

Safwan El Assad. Digital Communications 2

Table of Contents

Guide

List of Illustrations

Tables

Pages

Digital Communications 2. Directed and Practical Work

Foreword

1. Theory of Information: Problems 1 to 15. 1.1. Problem 1 – Entropy

1.2. Problem 2 – K-order extension of a transmission channel

1.3. Problem 3 – Compressed speech digital transmission and Huffman coding

1.4. Problem 4 – Coding without and with information compression

1.5. Problem 5 – Digital transmission of a TV signal (luminance component only) with information compression and Huffman coding

1.6. Problem 6 – Information, entropy, codes (1)

1.7. Problem 7 – Information, entropy, codes (2)

1.8. Problem 8 – Coding and transmission of a television-type information source

1.9. Problem 9 – Entropy and motion information encoding of multimedia source

1.10. Problem 10 – Hamming coding

1.11. Problem 11 – Cyclic coding (1)

1.12. Problem 12 – Cyclic coding (2)

1.13. Problem 13 – Cyclic coding and Hamming coding (1)

1.14. Problem 14 – Cyclic coding and Hamming coding (2)

1.15. Problem 15 – Cyclic code, M-sequences, and Gold sequences

2. Baseband Digital Transmission: Problems 16 to 26. 2.1. Problem 16 – Entropy and information to signal source coding

Solution of problem 16

2.2 Problem 17 – Calculation of autocorrelation function and power spectral density by probabilistic approach of RZ and NRZ binary on-line codes

Solutionof problem 17

2.3. Problem 18 – Calculation of the autocorrelation function and the power spectral density by probabilistic approach of the bipolar RZ code

Solutionof problem 18

2.4. Problem 19 - Transmission using a partial response linear coding

2.5. Problem 20 - Signal information coding and digital transmissions with partial response linear encoder

2.6. Problem 21 – Baseband digital transmission system (1)

2.7. Problem 22 – Baseband digital transmission (2)

2.8. Problem 23 – M-ary baseband digital transmission

2.9. Problem 24 – Baseband digital transmission of bipolar coded information

2.10. Problem 25 – Baseband transmission and reception using a partial response linear coding (1)

2.11. Problem 26 – Baseband transmission and reception using a partial response linear coding (2)

3. Digital Transmissions with Carrier Modulation: Problems 27 to 33. 3.1. Problem 27 – Digital transmissions with carrier modulation

3.2. Problem 28 – 4-QAM digital modulation transmission (1)

3.3. Problem 29 – Digital transmissions with 2-ASK modulation

3.4. Problem 30 – 4-QAM digital modulation transmission (2)

3.5. Problem 31 – Digital transmissions with 4-QAM digital modulation: case of single and double paths propagation

3.6. Problem 32 – Performance of digital modulations and 16 -QAM digital modulation

3.7. Problem 33 – QAM encoding and transmission of motion information of digital video

4. Study of the Transmission of Digital Information on Two-wire Cables. 4.1. Introduction

4.2. Recall of essential results on transmission line theory

4.3. Practical study

4.4. Objectives

4.5. Measurement of the characteristic impedance Zc by a reflectometry method (Time Domain Reflectometry: TDR)

4.6. Measurement of attenuation α as a function of frequency

4.7. Variation of the attenuation α as a function of length

4.8. Measurement of the bitrate D (bit/s)

5. Study of Baseband Digital Transmission Systems for the Transmission of Analog Signals (Transmitter and Receiver) 5.1. Objectives

5.2. First part – Study of a pulse amplitude modulation and time division multiplex signal transmission system

5.2.1. Experimental study

5.2.1.1. Mode 1 of operation

5.2.1.2. Mode 2 of operation (without separate transmission of the clock)

5.2.1.3. Mode 3 of operation (one link only between the transmitter and the receiver)

5.3. Second part – Study of a pulse code modulation (PCM) signal transmission system and transmission error control (error detector code and error corrector code)

5.3.1. Experimental study

5.3.1.1. Study without error of transmission and without protection code. 5.3.1.1.1. Mode 1 of operation (clock and frame synchronization are also provided to the receiver)

5.3.1.1.2. Mode 2 of operation (only the clock is also provided to the receiver) Activate

5.3.1.1.3. Mode 3 of operation (only the transmitted signal is used as a link between transmitter and receiver)

5.3.1.2. Study with protection code against transmission errors. 5.3.1.2.1. Error-free

5.3.1.2.2. With errors in the transmitter or in the transmission channel

5.3.1.2.3. With errors in the receiver

6. Study of On-line Codes for Baseband Modulation and Carrier Modulation. 6.1. Objectives

6.2. Description of the electronic boards

6.3. First part – Study of on-line codes for baseband digital transmission

6.3.1. Experimental part

6.4. Second part – Study of digital modulations with carrier

6.4.1. Amplitude shift keying modulation (ASK)

6.4.2. Digital frequency shift modulation (FSK)

6.4.3. Phase shift keying modulation (PSK)

7. Study of a QPSK Modem Under MATLAB, Simulink, Communications and DSP. 7.1. Objective

7.2. Required work

7.3. Appendix: Diagrams of the QPSK modem and its different blocks

8. Study of a Coding and Decoding System by Cyclic Codes. 8.1. Objective

8.2. Recall of the principles of cyclic coding and decoding

8.3. Coding by division: systematic code

8.4. Decoding by division: principle of calculating the syndrome

8.5. Required work

8.6. Appendix: Block diagrams

References

Index

A

B

C

D

E, F

G, H

I, K

L, M, N, O

P

Q, R

S

T, V, W

2020

2019

2018

2017

2016

2015

2014

2012

2011

2010

2009

2008

2007

2006

WILEY END USER LICENSE AGREEMENT

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To all our families, far and wide

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This book, which is composed of two associated volumes, is presented in its first aspect, as a very concise and complete synthesis of the foundations and techniques of digital communications (Volume 1). It is broken down into two parts. The first part concerns the theory of information itself, which deals with both sources of information and communication channels, in terms of the errors they introduce in the transmission of information, as well as ways to protect the latter by using appropriate coding methods. The second part deals with the technical aspects of transmission, we first present the baseband transmission with the important concept of equalization and its implementations. The performance evaluation, in terms of probability of errors, is systematically developed and detailed as well as the on-line codes used. We then present the transmissions with digital modulation of carriers used in transmission (radio transmissions but also on electric cables).

A second important aspect, teaching knowledge and skills, composes this book (first part of Volume 2). It concerns the tutorial aspect of a course. This is an ordered set of about 30 standard problems with detailed solutions covering the different parts of the course. The set should allow a learner to gradually and deeply understand the essentials of this field and acquire the necessary skills to practice them in the industrial world.

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