Method and apparatus for mimo transmission

Abstract

The present disclosure relates to methods and apparatuses. According to an embodiment of the disclosure, a method comprises: transmitting the number of antenna panels equipped at a user equipment (UE), transmitting the number of panel groups (PGs), transmitting PG information indicating which antenna panel is grouped into which PG, transmitting the number of coherent PGs (CPGs), and transmitting CPG information indicating which PG is grouped into which CPG.

The following is what is claimed: 
     
         1 . A method comprising:
 transmitting a sounding reference signal resource indicator to a user equipment; and   transmitting a transmit precoding matrix indicator to the user equipment, wherein the transmit precoding matrix indicator corresponds to a sounding reference signal resource indicated by the sounding reference signal resource indicator.   
     
     
         2 . The method of  claim 1 , further comprising receiving a number of antenna panels equipped at the user equipment. 
     
     
         3 . The method of  claim 2 , further comprising receiving a number of panel groups, wherein each panel group of the panel groups includes at least one antenna panel sharing at least one transmit component of the user equipment. 
     
     
         4 . The method of  claim 3 , further comprising receiving panel group information indicating which antenna panel is grouped into which panel group. 
     
     
         5 . The method of  claim 4 , further comprising receiving a number of coherent panel groups, wherein each coherent panel group of the coherent panel groups includes at least two panel groups and the antenna panels in the at least two panel groups of each coherent panel group are coherent. 
     
     
         6 . The method of  claim 5 , further comprising receiving coherent panel group information indicating which panel group is grouped into which coherent panel group. 
     
     
         7 . The method of  claim 1 , further comprising receiving a beamforming architecture indicator corresponding to the user equipment. 
     
     
         8 . The method of  claim 7 , wherein the indicator indicates that the user equipment uses an analog beamforming architecture. 
     
     
         9 . The method of  claim 7 , wherein the indicator indicates that the user equipment uses a hybrid or digital beamforming architecture. 
     
     
         10 . The method of  claim 1 , wherein antenna panels sharing at least one transmit component of the user equipment are grouped into corresponding panel groups. 
     
     
         11 . A method comprising:
 receiving a transmit precoding matrix indicator at a user equipment; and   receiving a sounding reference signal resource indicator at a user equipment wherein the transmit precoding matrix indicator corresponds to a sounding reference signal resource indicated by the sounding reference signal resource indicator; and   transmitting a codeword on a physical uplink shared channel with precoders corresponding to the transmit precoding matrix indicator.   
     
     
         12 . The method of  claim 11 , further comprising transmitting a number of antenna panels equipped at the user equipment. 
     
     
         13 . The method of  claim 12 , further comprising transmitting a number of panel groups, wherein each panel group of the panel groups includes at least one antenna panel sharing at least one transmit component of the user equipment. 
     
     
         14 . The method of  claim 13 , further comprising transmitting panel group information indicating which antenna panel is grouped into which panel group. 
     
     
         15 . The method of  claim 14 , further comprising transmitting a number of coherent panel groups, wherein each coherent panel group of the coherent panel groups includes at least two panel groups and the antenna panels in the at least two panel groups of each coherent panel group are coherent. 
     
     
         16 . The method of  claim 15 , further comprising transmitting coherent panel group information indicating which panel group is grouped into which coherent panel group. 
     
     
         17 . The method of  claim 11 , further comprising transmitting a beamforming architecture indicator corresponding to the user equipment. 
     
     
         18 . The method of  claim 17 , wherein the indicator indicates that the user equipment uses an analog beamforming architecture. 
     
     
         19 . The method of  claim 17 , wherein the indicator indicates that the user equipment uses a hybrid or digital beamforming architecture. 
     
     
         20 . The method of  claim 11 , further comprising grouping antenna panels sharing at least one transmit component of the user equipment into corresponding panel groups.