Wcdma: Requirements and Practical Design

ISBN-13: 9780470861776 / Angielski / Twarda / 2004 / 452 str.

Jason Woodard; Rudolf Tanner; Jason Woodard

Opis

WCDMA (Wideband Code Division Multiple Access), an ITU standard derived from code division multiple access (CDMA) is officially known as IMT-2000 direct spread. WCDMA is a third generation mobile wireless technology offering much higher data speeds to mobile and portable wireless devices than commonly offered in today's market. WCDMA is a relatively new technology and there is little information in the public domain about specific design issues. The proposed book will discuss UMTS/WCDMA from the perspective of a potential development engineer, who may have experience of GSM but none of WCDMA technology. The book will outline the design specifications and potential problems and solutions faced by by an engineer designing a mobile device such as a handset. WCDMA: Requirements and Practical Design:

• Offers in-depth coverage of the critical issues in designing a UMTS handset modem.
• Discusses the practical design elements of a UMTS modem.
• Authored by leaders in their field, working at Ubinetics.

Highly relevant to professional software engineers, Design engineers, Electrical engineers (RF base-band, DSP software, protocol software), technical managers, postgraduate students and academics.

Spis treści

Preface xvii

Acknowledgements xix

Abbreviations xxi

1 Introduction 1

1.1 Evolution and Revolution of Mobile Telephony 1

1.2 The Third Generation Partnership Project 9

1.3 3GPP Terminology 13

1.4 The Journey of a Bit 14

1.5 Structure of the Book 18

2 RF and Baseband Processing 19

2.1 Introduction 19

2.2 UMTS Radio Requirements 20

2.3 Receiver RF Design 25

2.4 Receiver Baseband Design 36

2.5 Transmitter Baseband Design 48

2.6 Transmitter RF Design 52

2.7 Future Trends 64

3 Physical Layer Chip Rate Processing 67

3.1 Introduction 67

3.2 Spreading and Scrambling 70

3.3 Physical Channels 75

3.4 The Receiver 84

3.5 Cell Search 95

3.6 Power Control 98

3.7 Handover 101

3.8 Transmit Diversity in the Downlink 104

3.9 Physical Layer Procedures 107

3.10 Measurements 109

3.11 Compressed Mode 112

4 Physical Layer Bit Rate Processing 123

4.1 Introduction 123

4.2 Transport Channels, Formats and Combinations 124

4.3 Overview of the Bit Rate Processing Chain 129

4.4 Rate Matching 142

4.5 Convolutional Encoding and Decoding 153

4.6 Turbo Encoding and Decoding 167

4.7 TFC Detection 188

4.8 Compressed Mode and the BRP 192

4.9 BRP Limitations for Different TrCHs and CCTrCHs 196

4.10 Conclusions 197

5 Type Approval Testing: A Case Study 199

5.1 Introduction 199

5.2 History: the Making of the 3GPP DPCH BLER Requirements 202

5.3 Lab Testing 202

5.4 Exemplary Measurement Results 218

6 Medium Access Control 221

6.1 Introduction 221

6.2 MAC Functional Partitioning 226

6.3 MAC Receive Functionality 230

6.4 MAC Transmit Functionality 234

7 Radio Link Control 239

7.1 Introduction 239

7.2 Transparent Data Transfer Service 243

7.3 Unacknowledged Data Transfer Service 245

7.4 Acknowledged Data Transfer Service 250

8 PDCP 261

8.1 Introduction 261

8.2 Overall Architecture 263

8.3 PDCP Interface 264

8.4 Header Compression 268

8.5 SRNS Relocation 271

8.6 PDCP Header Formats 273

8.7 Handling an Invalid PDU Type and PID 276

9 Broadcast/Multicast Control 277

9.1 Introduction 277

9.2 CTCH Scheduling 279

10 RRC 285

10.1 Introduction 285

10.2 Cell Selection and Reselection 292

10.3 Reception of Broadcast System Information 294

10.4 Paging and Notification 298

10.5 Establishment, Maintenance and Release of an RRC Connection Between the UE and UTRAN 299

10.6 Establishment, Reconfiguration and Release of Radio Access Bearers 300

10.7 Assignment, Reconfiguration and Release of Radio Resources for the RRC Connection 301

10.8 RRC Connection Mobility Functions 302

10.9 Routeing of Higher Layer PDUs 303

10.10 Control of Requested QoS 304

10.11 UE Measurements 305

10.12 Power Control 319

10.13 Arbitration of Radio Resources on Uplink DCH 320

10.14 Integrity Protection 320

10.15 Ciphering Management 321

10.16 PDCP Control 322

10.17 CBS Control 323

11 Speech Coding for UMTS 327

11.1 Introduction – the Adaptive Multirate (AMR) Speech Codec 327

11.2 AMR Structure 328

11.3 Linear Prediction Analysis 330

11.4 LSF Quantization 330

11.5 Pitch Analysis 330

11.6 Fixed Codebook with Algebraic Structure 331

11.7 Post Processing 332

11.8 The AMR Codec’s bit Allocation 332

11.9 Speech Codec’s Error Sensitivity 334

11.10 Conclusions 334

12 Future Developments 335

12.1 Introduction 335

12.2 3GPP Release 5: HSDPA 336

12.3 Location–based Services 359

12.4 CPICH Interference Cancellation and Mitigation 365

12.5 Transmit Diversity for Multiple Antennas 369

12.6 Improved Baseband Algorithms and Technology Trends 372

A Appendix A: ML detection for uncoded QPSK 391

B Appendix B: SIR computation 395

References 399

Index 417

Blurb

WCDMA–Requirements and Practical Design discusses direct sequence CDMA, a well–established technology used in both second and third generation wireless standards. The authors provide practical information on the design, development and implementation of a WCDMA modem and protocol software.

Written in a methodical and highly accessible manner this book will appeal to professional communications engineers and software and hardware engineers, along with postgraduate students and academics.

The book:

• Addresses all aspects of the development of a WCDMA (UMTS) handset from the RF chain through the physical and protocol layers to the speech codec.
• Combines introductions to the 3GPP FDD WCDMA standard and practical engineering aspects of the development of user equipment allowing for a better understanding of the specifications.
• Discusses the physical layer, including the Rake receiver and turbo decoder, and the protocol layers giving the reader a comprehensive overview of the technology involved.
• Provides engineers with practical tips and advice from the engineers who develop WCDMA user equipment.

WCDMA–Requirements and Practical Design is an invaluable and practical reference, written by engineers developing third generation wireless technology. Its explanation of the specifications and potential problems with solutions will be extremely useful for those designing a 3G mobile wireless device.