En300744[1][1].V1.4.1.pdf (929.67 KB)[local]1[local]1[/local] 资料贴请填写下面资料简介：

【资料成文时间】：2001
【语言】：英文
【页数】：49
【何人（公司）所著】：ETSI
【文件格式】：pdf
【文件原名】：ETSI EN 300 744
【摘要或目录】：
and randomization for energy dispersal................................................. 11
4.3.2 Outer coding and outer interleaving...................................................................................................... 11
4.3.3 Inner coding........................................................................................................................................ 13
4.3.4 Inner interleaving................................................................................................................................ 14
4.3.4.1 Bit-wise interleaving...................................................................................................................... 14
4.3.4.2 Symbol interleaver......................................................................................................................... 18
4.3.5 Signal constellations and mapping........................................................................................................ 20
4.4 OFDM frame structure .............................................................................................................................. 24
4.5 Reference signals ..................................................................................................................................... 26
4.5.1 Functions and derivation ...................................................................................................................... 26
4.5.2 Definition of reference sequence .......................................................................................................... 26
4.5.3 Location of scattered pilot cells ............................................................................................................ 27
4.5.4 Location of continual pilot carriers ....................................................................................................... 28
4.5.5 Amplitudes of all reference information................................................................................................ 28
4.6 Transmission Parameter Signalling (TPS) .................................................................................................. 29
4.6.1 Scope of the TPS................................................................................................................................. 29
4.6.2 TPS transmission format ...................................................................................................................... 30
4.6.2.1 Initialization .................................................................................................................................. 30
4.6.2.2 Synchronization............................................................................................................................. 30
4.6.2.3 TPS length indicator ....................................................................................................................... 30
4.6.2.4 Frame number ............................................................................................................................... 31
4.6.2.5 Constellation ................................................................................................................................. 31
4.6.2.6 Hierarchy information.................................................................................................................... 31
4.6.2.7 Code rates ..................................................................................................................................... 31
4.6.2.8 Guard Intervals.............................................................................................................................. 32
4.6.2.9 Transmission mode......................................................................................................................... 32
4.6.2.10 Cell identifier ................................................................................................................................ 32
4.6.2.11 Error protection of TPS................................................................................................................... 33
4.6.3 TPS modulation .................................................................................................................................. 33
4.7 Number of RS-packets per OFDM super-frame.......................................................................................... 33
4.8 Spectrum characteristics and spectrum mask.............................................................................................. 34
4.8.1 Spectrum characteristics...................................................................................................................... 34
4.8.2 Out-of-band spectrum mask (for 8 MHz channels)................................................................................ 35
4.8.3 Centre frequency of RF signal (for 8 MHz UHF channels).................................................................... 38
Annex A (informative): Simulated systemperformance for 8 MHz channels ................................39
Annex B (informative): Definition of P1 and F1 ...............................................................................41
Annex C (informative): Interleaving example .................................................................................43
Annex D (informative): Guidelines to implementation of the emitted signal..................................44
D.1 Use of the FFT.................................................................................................................................44
D.2 Choice of "baseband" centre frequency .............................................................................................45
D.3 Other potential difficulties ................................................................................................................45
Annex E (normative): Values for 6 MHz and 7 MHz channels.....................................................46
History ......................................................................................................................................................49