Patent ID: 8611463

Claim:
A terminal comprising: a codebook storage unit configured to store information associated with a codebook including matrices: 1 2 ⁡ [ 1 1 1 1 1 1 - 1 - 1 1 - 1 1 - 1 1 - 1 - 1 1 ] , ⁢ 1 2 ⁡ [ 1 1 - 1 - 1 1 1 1 1 - 1 1 1 - 1 - 1 1 - 1 1 ] , and 1 2 ⁡ [ 1 - j 1 - j j 1 - j - 1 1 j 1 j j - 1 - j 1 ] ; a selector configured to select a target matrix from the stored information associated with the codebook; and an information feedback unit configured to feed back information associated with the target matrix to a base station.