td-lte简介和物理层介绍

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1、主要内容第一章LTE简介----------------------------------第二章物理层介绍----------------------------------第一章LTE简介相关接口与协议第二章物理层介绍Downlink：OFDMAUplink：SC-FDMATDDCarrierFrequencyandBandwithFDL=FDL_low+0.1(NDL–NOffs-DL)FUL=FUL_low+0.1(NUL–NOffs-UL)Where:AsforTDD,DL=ULNDLandNUL=earfcnOtherparametersfromtable“E-UTRAchan

2、nelnumbers”in3GPPTS36.101earfcnE-UTRAAbsoluteRadioFrequencyChannelNumber.TheSupportedBandforTDLTEisBand38and40LNCEL:37750-38249;1;-LNCEL:38650-39649;1;-(Range;Step;Default)chBWTDDChannelBandWidthLNCEL:10MHz(3),20MHz(4);20MHz(4);BandDownlinkUplinkFDL_low(MHz)NOffs-DLRangeofNDLFUL_low(MHz)NOffs-ULRan

3、geofNUL1211000–59919201300013000–1359921930600600-119918501360013600–141993180512001200–194917101420014200–149494211019501950–239917101495014950–15399586924002400–26498241540015400–15649687526502650–27498301565015650–157497262027502750–344925001575015750–16449892534503450–37998801645016450–16799918

4、44.938003800–41491749.91680016800–1714910211041504150–474917101715017150–17749111475.947504750–49991427.91775017750–17999121374651805180–52797771818018180–182791475852805280–53797881828018280–18379…3319003600036000–3619919003600036000–361993420103620036200–3634920103620036200–363493518503635036350–

5、3694918503635036350–369493619303695036950–3754919303695036950–375493719103755037550–3774919103755037550–377493825703775037750–3824925703775037750–382493918803825038250-3864918803825038250-386494023003865038650-3964923003865038650-39649OFDM原理TimeStructureandCPlengthSubframelengthis1msforallbandwidth

6、sNormalslotlengthis0.5ms——normalsubframe=2slotsSlotcarries7symbolswithnormalcyclicprefixor6symbolswithextendedprefix——CPlengthdependsonthesymbolpositionwithinthesolt:NormalCP:symbol0ineachslothasCP=160XTs[5.21usandremainningsymbolsCP=144XTs(4.7us)]ExtendedCP:CPlengthforallslotsis512XTs(16.67us)cycP

7、refixCyclicPrefixConfiguration/lengthLNCEL:normal(0);;normal(0)Ts=1sec/(subcarrierspacingXmaxFFTsize)=1/(15000X2048)理论比特速率-DownlinkBitRatePRB：Symbolrate=168kspsQPSK=>2bitspersymbol=>336kbps16QAM=>4bitspersy