文件名称:
LTE for 4G Mobile Broadband----Air Interface Technologies and Performance
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文件大小: 8mb
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上传时间: 2010-10-15
详细说明： Preface The Global system for mobile communications (GSM) is the dominant wireless cellular standard with over 3.5 billion subscribers worldwide covering more than 85% of the global mobile market. Furthermore, the number of worldwide subscribers using high-speed packet access (HSPA) networks topped 70million in 2008.HSPAis a 3Gevolution ofGSMsupporting high-speed data transmissions usingWCDMAtechnology.Global uptake ofHSPAtechnology among consumers and businesses is accelerating, indicating continued traffic growth for high- sp eed mobile networks worldwide. In order to meet the continued traffic growth demands, an extensive effort has been underway in the 3G Partnership Project (3GPP) to develop a new standard for the evolution of GSM/HSPAtechnology towards a packet-optimized system referred to as Long-Term Evolution (LTE). The goal of the LTE standard is to create specifications for a new radio-access technology geared to higher data rates, low latency and greater spectral efficiency. The spectral efficiency target for the LTE system is three to four times higher than the current HSPA system. These aggressive spectral efficiency targets require pushing the technology envelope by employing advanced air-interface techniques such as low-PAPR orthogonal uplink multiple access based on SC-FDMA(single-carrier frequency divisionmultiple access)MIMOmultiple-input multiple-outputmulti-antenna technologies, inter-cell interferencemitigation techniques, low- latency channel structure and single-frequency network (SFN) broadcast. The researchers and engineers working on the standard come up with new innovative technology proposals and ideas for system performance improvement. Due to the highly aggressive standard development schedule, these researchers and engineers are generally unable to publish their proposals in conferences or journals, etc. In the standards development phase, the proposals go through extensive scrutiny with multiple sources evaluating and simulating the proposed technologies from system performance improvement and implementation complexity perspectives. Therefore, only the highest-quality proposals and ideas finally make into the standard. The book provides detailed coverage of the air-interface technologies and protocols that withstood the scrutiny of the highly sophisticated technology evaluation process typically used in the 3GPP physical layer working group.We describe why certain technology choices were made in the standard development process and how each of the technology components selected contributes to the overall systemperformance improvement.As such, the book serves as a valuable reference for system designers and researchers not directly involved in the standard development phase. I am indebted to many colleagues at Samsung, in particular to Zhouyue (Jerry) Pi, Jianzhong (Charlie) Zhang, Jiann-An Tsai, Juho Lee, Jin-Kyu Han and Joonyoung Cho. These colleagues and other valued friends, too numerous to bementioned, have deeply influencedmyxiv Preface understanding of wireless communications and standards.Without the unprecedented support of PhilMeyler, SarahMatthews, Dawn Preston and their colleagues at Cambridge University Press, this monograph would never have reached the readers. Finally my sincere gratitude goes to the numerous researchers and engineers who contributed to the development of the LTE standard in 3GPP, without whom this book would not have materialized. ...展开收缩
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