Section: 5.3.2A.2 Layer mapping for spatial multiplexing
Content: For spatial multiplexing, the layer mapping shall be done according to Table 5.3.2A.2-1. The number of layers is less than or equal to the number of antenna ports used for transmission of the physical uplink shared channel. The case of a single codeword mapped to multiple layers is only applicable when the number of antenna ports used for PUSCH is four, except for slot-PUSCH and subslot-PUSCH transmission where a single codeword is used irrespective of the number of layers. Table 5.3.2A.2-1: Codeword-to-layer mapping for spatial multiplexing