Patent ID: 8325846

Claim:
A method for transmitting a signal in a multiple antenna system, the method performed at a transmitter and comprising: pre-coding the signal based on a codebook, the codebook comprising pre-coding matrices, the pre-coding matrices including 1 2 ⁡ [ 1 0 0 1 0 0 0 1 0 0 0 1 ] , 1 2 ⁡ [ 1 0 0 - 1 0 0 0 1 0 0 0 1 ] , 1 2 ⁡ [ 1 0 0 0 1 0 1 0 0 0 0 1 ] , 1 2 ⁡ [ 1 0 0 0 1 0 - 1 0 0 0 0 1 ] , ⁢ 1 2 ⁡ [ 1 0 0 0 1 0 0 0 1 1 0 0 ] , 1 2 ⁡ [ 1 0 0 0 1 0 0 0 1 - 1 0 0 ] , 1 2 ⁡ [ 0 1 0 1 0 0 1 0 0 0 0 1 ] , 1 2 ⁡ [ 0 1 0 1 0 0 - 1 0 0 0 0 1 ] , ⁢ 1 2 ⁡ [ 0 1 0 1 0 0 0 0 1 1 0 0 ] , 1 2 ⁡ [ 0 1 0 1 0 0 0 0 1 - 1 0 0 ] , 1 2 ⁡ [ 0 1 0 0 0 1 1 0 0 1 0 0 ] ⁢ ⁢ and 1 2 ⁡ [ 0 1 0 0 0 1 1 0 0 - 1 0 0 ] ; and transmitting the pre-coded signal using a radio resource.