5.3.1 确定调制阶数 ..................................................................................................... 129
5.3.2 确定 TB size ......................................................................................................... 130
第 6 章 传输模式（Transmission Mode） ......................................................................... 136
6.1 TM 模式简介 ............................................................................................................... 136
6.2 TB/codeword/layer/precoding/port ........................................................................... 140
6.2.1 TB ......................................................................................................................... 141
6.2.2 codeword ............................................................................................................. 142
6.2.3 layer ..................................................................................................................... 142
6.2.4 precoding ............................................................................................................. 144
6.2.5 antenna port ........................................................................................................ 144
6.3 基于码本的预编码和基于非码本的预编码 ............................................................. 145
6.3.1 基于码本的预编码 ............................................................................................. 145
6.3.2 基于非码本的预编码 ......................................................................................... 147
6.4 SU-MIMO 和 MU-MIMO ............................................................................................. 149
6.5 TM 模式 ....................................................................................................................... 151
6.5.1 TM 1 ..................................................................................................................... 151
6.5.2 TM 2 ..................................................................................................................... 152
6.5.3 TM 3 ..................................................................................................................... 156
6.5.4 TM 4 ..................................................................................................................... 160
6.5.5 TM 5 ..................................................................................................................... 163
6.5.6 TM 6 ..................................................................................................................... 167
6.5.7 TM 7 ..................................................................................................................... 173
6.5.8 TM 8 ..................................................................................................................... 175
6.5.9 TM 9 ..................................................................................................................... 182
第 7 章 上行参考信号 ......................................................................................................... 192
7.1 DMRS ........................................................................................................................... 192
7.1.1 上行参考信号序列 ............................................................................................. 192
7.1.2 DMRS：Demodulation Reference Signal ............................................................ 198
7.2 SRS ............................................................................................................................... 206
