A method in a user equipment for generating a channel state information feedback report including multiple layers, from channel state information associated with each of the multiple layers including at least one parameter, which is commonly present in the channel state information associated with each of the multiple layers, each commonly present parameter in each of the multiple layers having a respective value, the method comprising:
- receiving a set of reference signals transmitted from a network entity;
- organizing observed channel characteristics, based on the received set of reference signals, into the multiple layers of channel state information;
- selecting from the at least one parameter, which is commonly present in each of the multiple layers, one or more parameters from which a respective index value can be derived for each of the multiple layers;
- jointly encoding the derived respective index values;
- and
- formulating the channel state information feedback report, which includes the jointly encoded derived index values, and the channel state information of each of the multiple layers, exclusive of the selected one or more parameters from which the respective index value for each of the multiple layers has been derived.