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CDMA Mobile Radio Design
Computer Communications 26 (2003) 1028 www.elsevier.com/locate/comcom
Book Review CDMA Mobile Radio Design CDMA Mobile Radio Design, J.B. Gore, L.E. Larson; Artech House Publishers, 2000, ISBN 1580530591 This book is one of the most thorough books on CDMA technology as applied to mobile communications. It covers both the 2nd generation CDMA-based IS-95 standard as well as the 3rd generation W-CDMA (UMTS) and multicarrier CDMA (CDMA-2000). The main focus of the book is on the physical layer and communication transceiver design. The book does not address issues such as capacity planning and mobile system deployment issues (such as cell design, coverage, handoff handling etc). This does not represent any problem since the book is quite comprehensive in its category and in what it covers. The authors have 35 þ years of combined system design experience which is well-reflected over the pages of the book. They provide a clearly written text accompanied by illustrative figures and excellent explanation of the fine details of the covered topics. CDMA-based mobile communication systems are known to have used all known tricks known to wireless communication system designers. Firstly, it was a tough call to realize such a system in the first place, and secondly use CDMA to boost cellular system capacity. The book provides a good source for learning these “tricks”. While the book is not divided into part, it can conceptually be divided into three parts: an introductory parts (Ch. 1 and Ch. 2). The details of the CDMA-based IS95 standard. (Ch.3 through Ch. 9), and advanced part containing material on W-CDMA and advanced techniques of CDMA mobile radio (Ch. 10 and Ch. 11). The book first addresses the key issues in any wireless mobile communication system such as path loss, multipath fading, limited spectrum, etc. It briefly summarizes known mobile cellular standards and multiple access techniques (CDMA, TDMA, FDMA). The CDMA concept is then explored with an explanation of the orthogonal spreading technique and how the same frequency and time can be used by several channels by spreading by orthogonal codes. The problem with this part however is that it lacks explanation of why CDMA was long regarded as unfeasible in the cellular environment and its usage was mainly confined to multiple access in applications such as military and satellite communications. The role of power control and how it can overcome the near-far problem needs to be mentioned. It would have been helpful here to include a simplified CDMA capacity equation and PII: S 0 1 4 0 - 3 6 6 4 ( 0 2 ) 0 0 2 4 5 - 1
provide capacity comparison with an AMPS and D-AMPS system allocated the same spectral bandwidth. This comparison could have revealed some of the inherent advantages of CDMA for cellular communications. The block diagram of the CDMA transceiver is then provided and a discussion about each functional block is outlined. In the second part of the book (Ch. 3 through Ch. 9), technical details about CDMA/IS-95 physical layer are provided. This is a very detailed reference for all aspects of the system design. The authors discuss speech coding, the digital modem, data conversion (A/D and D/A), and RF design down to the circuit level of both the transmitter and receiver. Personally, this reviewer has tremendously benefited from the illustrative examples of the Viterbi algorithm and convolutional coding, A/D conversion, sample rate conversion, pulse shaping, and carrier recovery as used in IS-95. This is very good material that can be assigned as reading material in an advanced digital communication course to serve as an example of how to put general communications theory into practice in a system of the complexity of CDMA/IS-95. The final part of the book covers two important topics. The first topic is third generation CDMA (termed nextgeneration at the time of writing the book) where W-CDMA (UMTS) and multi-carrier CDMA (the CDMA-2000 family) are discussed. The second topic is on advanced CDMA mobile radios. Techniques for image rejection in a heterodyne receiver, digital IS, and direct conversion receivers are provided. Also, linearized power amplifiers (PA) via nonlinear circuits, feedforward PA’s, and predistortion techniques are discussed. One of the best things about the book is a comprehensive reference list at the end of each chapter, as well as a glossary of terms in the acronym-rich world of CDMA. As an educator, I would have loved that each chapter would have a set of questions/workout problems but I can understand that the audience of the book is mainly the R&D community. In summary, this is a very valuable and well-written book. I highly recommend it as a reference for R&D engineers and as an “additional reading” material for academic purposes. Khaled Fouad Elsayed, Associate Professor Department of Electronics and Communications Engineering, Faculty of Engineering, Cairo University, Giza 12613, Egypt
Book Review CDMA Mobile Radio Design CDMA Mobile Radio Design, J.B. Gore, L.E. Larson; Artech House Publishers, 2000, ISBN 1580530591 This book is one of the most thorough books on CDMA technology as applied to mobile communications. It covers both the 2nd generation CDMA-based IS-95 standard as well as the 3rd generation W-CDMA (UMTS) and multicarrier CDMA (CDMA-2000). The main focus of the book is on the physical layer and communication transceiver design. The book does not address issues such as capacity planning and mobile system deployment issues (such as cell design, coverage, handoff handling etc). This does not represent any problem since the book is quite comprehensive in its category and in what it covers. The authors have 35 þ years of combined system design experience which is well-reflected over the pages of the book. They provide a clearly written text accompanied by illustrative figures and excellent explanation of the fine details of the covered topics. CDMA-based mobile communication systems are known to have used all known tricks known to wireless communication system designers. Firstly, it was a tough call to realize such a system in the first place, and secondly use CDMA to boost cellular system capacity. The book provides a good source for learning these “tricks”. While the book is not divided into part, it can conceptually be divided into three parts: an introductory parts (Ch. 1 and Ch. 2). The details of the CDMA-based IS95 standard. (Ch.3 through Ch. 9), and advanced part containing material on W-CDMA and advanced techniques of CDMA mobile radio (Ch. 10 and Ch. 11). The book first addresses the key issues in any wireless mobile communication system such as path loss, multipath fading, limited spectrum, etc. It briefly summarizes known mobile cellular standards and multiple access techniques (CDMA, TDMA, FDMA). The CDMA concept is then explored with an explanation of the orthogonal spreading technique and how the same frequency and time can be used by several channels by spreading by orthogonal codes. The problem with this part however is that it lacks explanation of why CDMA was long regarded as unfeasible in the cellular environment and its usage was mainly confined to multiple access in applications such as military and satellite communications. The role of power control and how it can overcome the near-far problem needs to be mentioned. It would have been helpful here to include a simplified CDMA capacity equation and PII: S 0 1 4 0 - 3 6 6 4 ( 0 2 ) 0 0 2 4 5 - 1
provide capacity comparison with an AMPS and D-AMPS system allocated the same spectral bandwidth. This comparison could have revealed some of the inherent advantages of CDMA for cellular communications. The block diagram of the CDMA transceiver is then provided and a discussion about each functional block is outlined. In the second part of the book (Ch. 3 through Ch. 9), technical details about CDMA/IS-95 physical layer are provided. This is a very detailed reference for all aspects of the system design. The authors discuss speech coding, the digital modem, data conversion (A/D and D/A), and RF design down to the circuit level of both the transmitter and receiver. Personally, this reviewer has tremendously benefited from the illustrative examples of the Viterbi algorithm and convolutional coding, A/D conversion, sample rate conversion, pulse shaping, and carrier recovery as used in IS-95. This is very good material that can be assigned as reading material in an advanced digital communication course to serve as an example of how to put general communications theory into practice in a system of the complexity of CDMA/IS-95. The final part of the book covers two important topics. The first topic is third generation CDMA (termed nextgeneration at the time of writing the book) where W-CDMA (UMTS) and multi-carrier CDMA (the CDMA-2000 family) are discussed. The second topic is on advanced CDMA mobile radios. Techniques for image rejection in a heterodyne receiver, digital IS, and direct conversion receivers are provided. Also, linearized power amplifiers (PA) via nonlinear circuits, feedforward PA’s, and predistortion techniques are discussed. One of the best things about the book is a comprehensive reference list at the end of each chapter, as well as a glossary of terms in the acronym-rich world of CDMA. As an educator, I would have loved that each chapter would have a set of questions/workout problems but I can understand that the audience of the book is mainly the R&D community. In summary, this is a very valuable and well-written book. I highly recommend it as a reference for R&D engineers and as an “additional reading” material for academic purposes. Khaled Fouad Elsayed, Associate Professor Department of Electronics and Communications Engineering, Faculty of Engineering, Cairo University, Giza 12613, Egypt