Network Node, User Equipment and Methods Therein to Enable the UE to Determine a Precoder Codebook

A base station for enabling a User Equipment (UE) to determine a precoder codebook in a wireless communication system, the base station comprising:

• a transceiver;
• a processor, operatively coupled to the transceiver;
• and
• a memory, operatively coupled to the processor and comprising instructions for execution by the processor, said instructions being configured to, upon execution by the processor, cause the base station to:
• transmit, to the UE, values of precoder parameters enabling the UE to determine the precoder codebook based on a parameter-based codebook, which precoder parameters are associated with a plurality of antenna ports of the base station and wherein the number of the plurality of antenna ports is a function of a number of antenna ports in a first dimension and a number of antenna ports in a second dimension, wherein the precoder parameters comprise a parameter that specifies the number of antenna ports in the first dimension and a parameter that specifies the number of antenna ports in the second dimension.

A User Equipment (UE) for determining a precoder codebook in a wireless communication system, the UE being configured to:

• a transceiver;
• a processor, operatively coupled to the transceiver;
• and
• a memory, operatively coupled to the processor and comprising instructions for execution by the processor, said instructions being configured to, upon execution by the processor, cause the UE to:
• receive, from a base station, values of precoder parameters enabling the UE to determine the precoder codebook, which precoder parameters are associated with a plurality of antenna ports of the base station, and wherein the number of the plurality of antenna ports is a function of a number of antenna ports in a first dimension and a number of antenna ports in a second dimension, wherein the precoder parameters comprise a parameter that specifies the number of antenna ports in the first dimension and a parameter that specifies the number of antenna ports in the second dimension, and
• determine the precoder codebook based on the received values of the precoder parameters and a parameter-based codebook.