Patent ID: 10749584

Abstract:
Methods and apparatuses for a codebook for uplink MIMO in advanced wireless communication systems. A user equipment (UE) includes a processor and a transceiver operably connected to the processor. The transceiver is configured to transmit, to a base station (BS), a message reporting a coherence capability of the UE for an indication of a transmit precoding matrix indicator (TPMI) and a number of layers. The transceiver is configured to receive, from the BS, the indication of the TPMI and the number of layers via downlink control information (DCI) signaling. The transceiver is configured to transmit, to the BS, uplink (UL) data via a physical uplink shared channel (PUSCH) based on the received indication of the TPMI and the number of layers. A number of bits in the DCI signaling for the indication of the TPMI and the number of layers is determined by a coherence state that depends on the coherence capability reported by the UE.