tailieunhanh - Fundamental of Wireless Communication

Past decade has seen a surge of research activities in the field of wireless communication. Emerging from this research thrust are new points of view on how to communicate effectively over wireless channels. The goal of this course is to study in a unified way the fundamentals as well as the new research developments. The concepts are illustrated using examples from several modern wireless systems (GSM, IS-95, CDMA 2000 1x EV-DO, Flarion's Flash OFDM, ArrayComm systems.) | Fundamentals of Wireless Communication David Tse Dept of EECS . Berkeley Course Objective Past decade has seen a surge of research activities in the field of wireless communication. Emerging from this research thrust are new points of view on how to communicate effectively over wireless channels. The goal of this course is to study in a unified way the fundamentals as well as the new research developments. The concepts are illustrated using examples from several modern wireless systems (GSM, IS-95, CDMA 2000 1x EV-DO, Flarion's Flash OFDM, ArrayComm systems.) Course Outline Day 1: Fundamentals The Wireless Channel 2. Diversity 3. Capacity of Wireless Channels Course Outline (2) Day 2: MIMO 4. Spatial Multiplexing and Channel Modelling 5. Capacity and Multiplexing Architectures 6. Diversity-Multiplexing Tradeoff Course Outline (3) Day 3: Wireless Networks 7. Multiple Access and Interference Management: A comparison of 3 systems. 8. Opportunistic Communication and Multiuser . | Fundamentals of Wireless Communication David Tse Dept of EECS . Berkeley Course Objective Past decade has seen a surge of research activities in the field of wireless communication. Emerging from this research thrust are new points of view on how to communicate effectively over wireless channels. The goal of this course is to study in a unified way the fundamentals as well as the new research developments. The concepts are illustrated using examples from several modern wireless systems (GSM, IS-95, CDMA 2000 1x EV-DO, Flarion's Flash OFDM, ArrayComm systems.) Course Outline Day 1: Fundamentals The Wireless Channel 2. Diversity 3. Capacity of Wireless Channels Course Outline (2) Day 2: MIMO 4. Spatial Multiplexing and Channel Modelling 5. Capacity and Multiplexing Architectures 6. Diversity-Multiplexing Tradeoff Course Outline (3) Day 3: Wireless Networks 7. Multiple Access and Interference Management: A comparison of 3 systems. 8. Opportunistic Communication and Multiuser Diversity 9. MIMO in Networks 1. The Wireless Channel Wireless Mulipath Channel Channel varies at two spatial scales: large scale fading small scale fading Large-scale fading In free space, received power attenuates like 1/r2. With reflections and obstructions, can attenuate even more rapidly with distance. Detailed modelling complicated. Time constants associated with variations are very long as the mobile moves, many seconds or minutes. More important for cell site planning, less for communication system design. Small-scale multipath fading Wireless communication typically happens at very high carrier frequency. (eg. fc = 900 MHz or GHz for cellular) Multipath fading due to constructive and destructive interference of the transmitted waves. Channel varies when mobile moves a distance of the order of the carrier wavelength. This is m for Ghz cellular. For vehicular speeds, this translates to channel variation of the order of 100 Hz. Primary driver behind wireless communication system