Patent ID: 11817924

Abstract:
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit capability information to the network indicating its coherence capability for transmitting multiple layers on a single antenna port. In some cases, the indicated capability information may actually be less than the actual capability of the UE, but may indicate which transmission precoding matrix indicator (TPMI) indexes are valid, such that the UE is not expected to transmit complex waveforms resulting from too many layers per antenna port. In some examples, the UE may indicate, in the capability information, a threshold number of layers per antenna port it can support. In some examples, the UE may indicate its coherence capability on a per-rank basis. In some examples, the UE may be capable of supporting up to 8 layers per antenna port. In some cases, codebooks may be restricted to support 8 layer transmissions.