About this book This book focuses on a specific engineering problem that is and will continue to be important in the forthcoming information age: namely, the need for highly integrated radio systems that can be embedded in wireless devices for various applications, including portable mobile multimedia wireless communications, wireless appliances, digital cellular, and digital cordless. Traditionally, the design of radio ICs involves a team of engineers trained in a wide range of fields that include networking, communication systems, radio propagation, digital/analog circuits, RF circuits, and process technology. However, as radio ICs become more integrated, the need for a diverse skill set and knowledge becomes essential for professionals as well as students, to broaden beyond their trained area of expertise and to become proficient in related areas. The key to designing an optimized, economical solution for radio systems on a chip hinges on the designer's thorough understanding of the complex trade-offs from communication systems down to circuits. The purpose of this book is to provide a focused, top-down treatment of radio system IC design with an emphasis on digital radio systems that will play a dominant role in wireless communications in the 21st century. The intended readers of this book include both engineers as well as students whose main area of interest or line of work lies in the design and integrated circuits implementation of wireless communication ICs, with an emphasis on the integration of an entire radio system on a chip. Table of contents Preface. 1: Introduction. 1.1. A Brief History of Wireless. 1.2. The Challenges. 1.3. Organization of the Text. 2: Digital Communication Systems. 2.1. Digital System Basics. 2.2. Sources of Degradation in Mobile Radio Link. 2.3. Performance Analysis. 2.4. Digital Modulations. 2.5. Synchronization. 2.6. Forward Error Correction. 2.7. Diversity Techniques. 3: Spread-Spectrum Communications. 3.1. Spread-Spectrum Encoding. 3.2. Direct Sequence. 3.3. Frequency Hop. 3.4. Performance Comparison. 3.5. Cod Acquisition. 3.6. PN-Code Tracking. 4: RF System Design. 4.1. RF Transceiver Architecture. 4.2. Noise Performance. 4.3. Distortion Performance. 4.4. Other Performance Measures. 5: Radio System Design. 5.1 Radio Systems Overview. 5.2. Cellular System. 5.3. System Constraints. 5.4. System Design. 5.5. Link Design. 5.6. Implementation Specification. 5.7. Summary. 6: Digital Radio Architecture. 6.1. RF Front-End Architecture. 6.2. Analog-Digital Partition. 6.3. Digital Transceiver Architecture. 6.4. Typical Radio handset Architecture. 7: RF Circuits Design. 7.1. Transistor Models. 7.2. Noise. 7.3. Passive Elements. 7.4. Low Noise Amplifier. 7.5. Mixer. 7.6. Synthesizer. 7.7. Power Amplifier. 8: Digital Transceiver Design. 8.1. Design Considerations. 8.2. Communication Sub-blocks. 8.3. Modulator/Demodulator. 8.4. Spread-Spectrum Modulation. 8.5. Synchronization. 8.6. Path Diversity. 8.7. Time Diversity. 8.8. Spatial Diversity. 9: Case Studies. 9.1. Global System for Mobile Communications (GSM). 9.2. Other Examples. 9.3. Single-Chip Radio. 9.4. Concluding Remarks. References. Index.