【資料名稱】：OEA000101 LTE Air Interface ISSUE 1.04

【資料作者】：HUAWEI

【資料日期】：2010
【資料語言】：英文

【資料格式】：PDF

【資料目錄和簡介】
1 The Air Interface ............................................................................................................................. 1-1
1.1 Evolution of Cellular Networks .................................................................................................................... 1-2
1.1.1 First Generation Mobile Systems ......................................................................................................... 1-2
1.1.2 Second Generation Mobile Systems..................................................................................................... 1-2
1.1.3 Third Generation Mobile Systems ....................................................................................................... 1-4
1.1.4 Fourth Generation Mobile Systems...................................................................................................... 1-5
1.2 3GPP Releases.............................................................................................................................................. 1-6
1.2.1 Pre-Release 99..................................................................................................................................... 1-6
1.2.2 Release 99 ........................................................................................................................................... 1-7
1.2.3 Release 4 ............................................................................................................................................. 1-7
1.2.4 Release 5 ............................................................................................................................................. 1-7
1.2.5 Release 6 ............................................................................................................................................. 1-7
1.2.6 Release 7 ............................................................................................................................................. 1-8
1.2.7 Release 8 ............................................................................................................................................. 1-9
1.2.8 Release 9 and Beyond ........................................................................................................................ 1-10
1.3 Radio Interface Techniques ......................................................................................................................... 1-10
1.3.1 Frequency Division Multiple Access ................................................................................................. 1-10
1.3.2 Time Division Multiple Access .......................................................................................................... 1-11
1.3.3 Code Division Multiple Access .......................................................................................................... 1-11
1.3.4 Orthogonal Frequency Division Multiple Access .............................................................................. 1-12
1.4 Transmission Modes ................................................................................................................................... 1-12
1.4.1 Frequency Division Duplex ............................................................................................................... 1-13
1.4.2 Time Division Duplex ........................................................................................................................ 1-13
1.5 Spectrum Usage.......................................................................................................................................... 1-14
1.5.1 Frequency Bands ............................................................................................................................... 1-14
1.5.2 Existing Mobile Deployment ............................................................................................................. 1-16
1.5.3 LTE Release 8 Bands ......................................................................................................................... 1-17
1.6 Channel Coding in LTE ............................................................................................................................... 1-20
1.6.1 Transport Block CRC ......................................................................................................................... 1-20
1.6.2 Code Block Segmentation and CRC Attachment ............................................................................... 1-21
1.6.3 Channel Coding................................................................................................................................. 1-23
1.6.4 Rate Matching ................................................................................................................................... 1-28
Contents
LTE Air Interface
Training Manual
ii Huawei Proprietary and Confidential
Copyright . Huawei Technologies Co., Ltd
Issue 01 (2010-05-01)
1.6.5 Code Block Concatenation ................................................................................................................. 1-29
1.7 Principles of OFDM ................................................................................................................................... 1-30
1.7.2 Frequency Division Multiplexing ...................................................................................................... 1-30
1.7.1 OFDM Subcarriers ............................................................................................................................. 1-31
1.7.2 Fast Fourier Transforms ..................................................................................................................... 1-31
1.7.3 LTE FFT Sizes .................................................................................................................................. 1-32
1.7.4 OFDM Symbol Mapping ................................................................................................................... 1-32
1.7.5 Time Domain Interference ................................................................................................................. 1-33
1.7.6 OFDM Advantages and Disadvantages .............................................................................................. 1-35
2 LTE Physical Layer ......................................................................................................................... 2-1
2.1 The Uu Interface........................................................................................................................................... 2-3
2.2 LTE Radio Interface Protocols ...................................................................................................................... 2-3
2.2.1 Control and User Plane Protocols ........................................................................................................ 2-4
2.2.2 Non Access Stratum ............................................................................................................................. 2-4
2.2.3 RRC..................................................................................................................................................... 2-7
2.2.4 PDCP................................................................................................................................................... 2-7
2.2.5 RLC ..................................................................................................................................................... 2-8
2.2.6 MAC ................................................................................................................................................... 2-8
2.2.7 Physical ............................................................................................................................................... 2-9
2.3 LTE Channel Structure ................................................................................................................................. 2-9
2.3.1 Logical Channels............................................................................................................................... 2-10
2.3.2 Transport Channels............................................................................................................................ 2-11
2.3.3 Physical Channels .............................................................................................................................. 2-12
2.3.4 Radio Channels ................................................................................................................................. 2-13
2.3.5 Channel Mapping ............................................................................................................................... 2-13
2.4 LTE Frame Structure .................................................................................................................................. 2-15
2.4.1 Type 1 Radio Frames, Slots and Subframes ....................................................................................... 2-15
2.4.2 Type 2 Radio Frames, Slots and Subframes ....................................................................................... 2-17
2.5 OFDM Signal Generation ........................................................................................................................... 2-18
2.5.1 Codewords, Layers and Antenna Ports............................................................................................... 2-19
2.5.2 Scrambling ........................................................................................................................................ 2-20
2.5.3 Modulation Mapper ............................................................................................................................ 2-21
2.5.4 Layer Mapper .................................................................................................................................... 2-22
2.5.5 Precoding .......................................................................................................................................... 2-23
2.5.6 Resource Element Mapper ................................................................................................................. 2-26
2.5.7 OFDM Signal Generation .................................................................................................................. 2-26
2.6 Downlink OFDMA .................................................................................................................................... 2-26
2.6.1 General OFDMA Structure ................................................................................................................ 2-26
2.6.2 Physical Resource Blocks and Resource Elements ............................................................................ 2-27
2.7 LTE Physical Signals.................................................................................................................................. 2-28
2.8 Downlink Reference Signals ....................................................................................................................... 2-31

寫的言簡意賅，可惜舊了點，對初學者還是挺不錯的資料

[ 本帖最后由 komann 于 2012-5-9 22:02 編輯 ]