Content for TS 36.211 Word version: 16.4.0
6 Downlink
6.1 Overview
6.2 Slot structure and physical resource elements
6.3 General structure for downlink physical channels
6.3.1 Scrambling
6.3.2 Modulation
6.3.3 Layer mapping
6.3.4 Precoding
6.3.5 Mapping to resource elements
6.4 Physical downlink shared channel
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6 Downlink Word‑p. 98
6.1 Overview
6.2 Slot structure and physical resource elements Word‑p. 99
6.2.1 Resource grid
6.2.2 Resource elements Word‑p. 100
6.2.3 Resource blocks Word‑p. 101
6.2.3.1 Virtual resource blocks of localized type Word‑p. 102
6.2.3.2 Virtual resource blocks of distributed type
6.2.4 Resource-element groups (REGs) Word‑p. 103
6.2.4A Enhanced Resource-Element Groups (EREGs) |R11| Word‑p. 104
6.2.4B Short Resource-Element Groups (SREGs) |R15|
6.2.5 Guard period for half-duplex FDD operation
6.2.6 Guard Period for TDD Operation Word‑p. 105
6.2.7 Narrowbands and widebands |R13|
6.2.8 Guard period for narrowband and wideband retuning |R13| Word‑p. 106
6.3 General structure for downlink physical channels
6.3.1 Scrambling Word‑p. 107
6.3.2 Modulation Word‑p. 108
6.3.3 Layer mapping
6.3.3.1 Layer mapping for transmission on a single antenna port
6.3.3.2 Layer mapping for spatial multiplexing Word‑p. 109
6.3.3.3 Layer mapping for transmit diversity Word‑p. 110
6.3.4 Precoding
6.3.4.1 Precoding for transmission on a single antenna port
6.3.4.2 Precoding for spatial multiplexing using antenna ports with cell-specific reference signals Word‑p. 111
6.3.4.2.1 Precoding without CDD
6.3.4.2.2 Precoding for large delay CDD
6.3.4.2.3 Codebook for precoding and CSI reporting Word‑p. 112
6.3.4.3 Precoding for transmit diversity Word‑p. 113
6.3.4.4 Precoding for spatial multiplexing using antenna ports with UE-specific reference signals |R9| Word‑p. 114
6.3.5 Mapping to resource elements Word‑p. 115
6.4 Physical downlink shared channel Word‑p. 116
