Method and apparatus for antenna array channel feedback

摘要

A method and apparatus provide antenna array channel feedback. The method can include receiving a first set of channel state information reference signals on resource elements, and a second set of channel state information reference signals on resource elements. The method can include determining a first precoding matrix based on the received first set of channel state information reference signals. The first precoding matrix can be chosen from a first codebook. The method can include determining a second precoding matrix based on the second set of channel state information reference signals. The second precoding matrix can be chosen from a second codebook that is different than the first codebook. The method can include transmitting a representation of at least one of the first precoding matrix and the second precoding matrix.

主权项

1. A method comprising:
receiving, at a wireless terminal, a first set of channel state information reference signals on resource elements, and a second set of channel state information reference signals on resource elements; determining, by the wireless terminal, a first precoding matrix based on the received first set of channel state information reference signals, where the first precoding matrix is chosen from a first codebook; determining, by the wireless terminal, a second precoding matrix based on the second set of channel state information reference signals, where the second precoding matrix is chosen from a second codebook that is different than the first codebook; and transmitting, by the wireless terminal, a representation of at least one of the first precoding matrix and the second precoding matrix; wherein the second set of channel state information reference signals is based on the first precoding matrix.