MODULATION, DETECTION AND CODING

Telecommunications constitute an increasingly important part of human society. In some ways, they are a foundation on which industrial countries rely. Telecommunications play in numerous areas including, banking, air traffic control, medicine, digital and voice communications. More and more people need to understand the foundations of modern telecommunications.

The purpose of this book is to give an introduction to coding and modulation methods as well as other signal processing within modern telecom-munica-tions, using basic starting points. The principal topics are source coding, channel coding, modulation and detection. Adaptive channel equalisers and adaptive antennas, which are important parts of the detection process in many systems, are also covered and there are sections about link budget, sychronisation, together with codes and detectors for CDMA. The aim is to give the reader an understanding of the basic functions in telecommunication systems and the methods that are used for the analysis of a complete system.

Telecommunications is a field which develops quickly. An understanding of analysing methods which goes beyond simply an understanding of the results of the analysis is valuable knowledge - knowledge that will remain relevant over time and which will aid in understanding new developments as they arise.

This text contains theory, fully solved examples, exercises with answers and a short presentation of some communication systems. Basic knowledge in signal processing and probability theory is a necessity to acquire the material. The book is intended for courses on at least the master level but can also be used for self study.

Tommy ?berg is Associate Professor at the Signals and Systems Group, Uppsala University. He has a many years of experience as a teacher and researcher within the university and has been involved in a number of development projects in industry.

Preface

1 TELECOMMUNICATIONS

1.1 Usage today

1.2 History

1.3 Basic elements

1.4 Multiple user systems

1.5 Appendix: the division and usage of the electromagnetic spectrum

2 LINK BUDGET

2.1 Signal to noise ratio

3 INFORMATION THEORY AND SOURCE CODING

3.1 The concept of information

3.2 Channel

3.3 Source coding

3.4 Appendix

4 CHANNEL CODING

4.1 Error detection and error correction
4.2 Automatic repeat request

4.3 Block codes
4.4 Convolutional codes
4.5 Interleaving

4.6 Turbo coding
4.7 Cryptography
4.8 Appendix
5 MODULATION

5.1 Baseband modulation
5.2 Calculation methods for bandpass systems and signals

5.3 Analogue carrier modulation
5.4 Digital carrier modulation
5.5 Appendix

6 DETECTION IN NOISE

6.1 Fundamentals of narrowband noise

6.2 Analogue systems
6.3 Digital systems
6.4 Diversity

6.5 The radio receiver

6.6 Appendix

7 ADAPTIVE CHANNEL EQUALISERS

7.1 Channel equaliser
7.2 Algorithms for adaptation
7.3 Appendix
8 ADAPTIVE ANTENNAS

8.1 Array antennas

8.2 Signal processing with array antennas
8.3 Spatio-temporal equalisers

9 CDMA: CODES AND DETECTORS
9.1 Spreading codes
9.2 Detectors for CDMA

9.3 Appendix: generator polynomials for m-sequences

10 SYNCHRONISATION

10.1 Introduction

10.2 Fundamentals of phase locked loops
10.3 Carrier synchronisation

10.4 Clock synchronisation

10.5 Frame synchronisation
APPENDIX A
Answers to exercises

Index