LTE_PHY
77页1、LTE PHY Spec. Samsung ElectronicsJune 24, 2008Contents Downlink Spec. Downlink Structure: FDD, TDD Initial Access Cell Search (PSC, SSC, RS) System Information Receive (PBCH, PCFICH, PDCCH) Random Access Downlink data transmission: PHICH, PDSCH Uplink Spec. Uplink Structure Uplink slot structure Uplink physical channels and signals Physical uplink shared channel (PUSCH) Physical uplink control channel (PUCCH) Reference signal (RS) Physical random access channel (PRACH)1Downlink structureLTE L1 S
2、pecification23Frame Structure Frame structure Frame structure type 1 Applicable to FDD and half duplex FDD Each radio frame is long and consists of 20 slots of length , numbered from 0 to 19( seconds) Frame structure type 2 Applicable to only TDD Each radio frame consists of two half frame length each and each half frame consists of 8 slots of length and #0 #1 #2 #3 #19One slot, Tslot= 15360Ts=0.5 msOne radio frame, Tf= 307200Ts=10 ms#18One subframems 10307200sf= TTms 5.0T15360sslot=Tms 5153600s
3、f= TTms 5.015360sslot= TT( )2048150001s=TFrame Structure Frame structure type 2(Cont.) Three special fields, DwPTS, GP, and UpPTS in subframe #1 and #6 Subframes 0 and 5 and DwPTS are always reserved for downlink transmission The lengths of DwPTS and UpPTS is given below subject to the total length of DwPTS, GP and UpPTS being equal to Supported configurations of uplink-downlink subframe allocation are specifiedms 107203s=TLengths of DwPTS/GP/UpPTSUplink-downlink allocations5Downlink Physical ch
4、annels A set of Resource Elements carrying information originating from higher layers Physical Downlink Shared Channel, PDSCH Physical Broadcast Channel, PBCH Physical Multicast Channel, PMCH Physical Control Format Indicator Channel, PCFICH Physical Downlink Control Channel, PDCCH Physical Hybrid ARQ Indicator Channel, PHICH Physical signals A set of Resource Elements NOT carrying information originating from higher layers Reference signal Synchronization signal6Resource Grid The transmitted si
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