Patent ID: 8204151

Claim:
A device for generating a codebook to transmit and receive data to and from a plurality of subscriber stations via a multiple input, multiple output (MIMO) system, the device comprising: a codebook generator configured to generate a precoding codebook using an 8-phase shift keying (PSK) alphabet-based 4 bit 4 transmitter and 8 transmitter antennas for a closed-loop SU-MIMO scheme, wherein at least one codebook is Base CW Rank Rank Rank Matrix Index 1 2 3 W 1 = 1 8 ⁢ H 1 , 1 , 1 ⁡ ( 1 , 1 , 1 , 1 ) 1 2 3 4 5 6 7 8 W 1 (:, 1) W 1 (:, 2) W 1 (:, 3) W 1 (:, 4) W 1 (:, 5) W 1 (:, 6) W 1 (:, 7) W 1 (:, 8) W 1 (:, 1 5) W 1 (:, 2 4) W 1 (:, 1 3 W 1 (:, 4 8) W 1 (:, 5 7) W 1 (:, 2 6) W 1 (:, 3 7) 6 8) W 1 (:, 1 3 5) W 1 (:, 1 2 4) W 1 (:, 1 2 3) W 1 W 1 (:, 1 4 8) W 1 (:, 5 6 7) W 1 (:, 2 4 6) W 1 (:, 2 3 7) 5 6 8) W 2 = 1 8 ⁢ H 3 , 3 , 3 ⁡ ( 3 , 3 , 3 , 3 ) 9 10 11 12 13 14 15 16 W 2 (:, 1) W 2 (:, 2) W 2 (:, 3) W 2 (:, 4) W 2 (:, 5) W 2 (:, 6) W 2 (:, 7) W 2 (:, 8) W 2 (:, 1 3) W 2 (:, 2 4) W 2 (:, 3 5) W 2 (:, 4 6) W 2 (:, 5 7 W 2 (:, 6 8) W 2 (:, 1 7) W 2 (:, 2 8) W 2 (:, 1 3 5) W 2 (:, 2 4 6) W 2 (:, 2 4 6) W 2 (:, 4 6 8) W 2 (:, 1 5 7) W 2 (:, 2 6 8) W 2 (:, 1 3 7) W 2 (:, 2 4 8) Base CW Rank Rank Rank Matrix Index 4 5 6 W 1 = 1 8 ⁢ H 1 , 1 , 1 ⁡ ( 1 , 1 , 1 , 1 ) 1 2 3 4 5 6 7 8 W 1 (:, 1357) W 1 (:, 1247) W 1 (:, 1234) W 1 (:, 1458) W 1 (:, 5678) W 1 (:, 2468) W 1 (:, 2367) 3568) W 1 (:, 12357 W 1 (:, 12478) W 1 (:, 12345) W 1 (:, 14568) W 1 (:, 15678) W 1 (:, 24678) W 1 (:, 23467) 34568) W 1 (:, 123567) W 1 (:, 124578) W 1 (:, 123457) W 1 (:, 124568) W 1 (:, 135678) W 1 (:, 124678) W 1 (:, 234678) 134568) W 2 = 1 8 ⁢ H 3 , 3 , 3 ⁡ ( 3 , 3 , 3 , 3 ) 9 10 11 12 13 14 15 16 W 2 (:, 1357) W 2 (:, 2468) W 2 (:, 3457) W 2 (:, 4678) W 2 (:, 1257) W 2 (:, 2678) W 2 (:, 1237) W 2 (:, 2348) W 2 (:, 12357) W 2 (:, 23468) W 2 (:, 34567) W 2 (:, 14678) W 2 (:, 12567) W 2 (:, 23678) W 2 (:, 12378) W 2 (:, 23458) W 2 (:, 123567) W 2 (:, 234678) W 2 (:, 134567) W 2 (:, 124678) W 2 (:, 124567) W 2 (:, 123678) W 2 (:, 123578) W 2 (:, 234568) Base CW Rank Rank Matrix Index 7 8 W 1 = 1 8 ⁢ H 1 , 1 , 1 ⁡ ( 1 , 1 , 1 , 1 ) 1 2 3 4 5 6 7 8 W 1 (:, 1234567) W 1 (:, 1245678) W 1 (:, 1234578) W 1 (:, 1234568) W 1 (:, 1235678) W 1 (:, 1234678) W 1 (:, 2345678) 1345678) W 1 (:, 12345678) n/a n/a n/a n/a n/a n/a n/a W 2 = 1 8 ⁢ H 3 , 3 , 3 ⁡ ( 3 , 3 , 3 , 3 ) 9 10 11 12 13 14 15 16 W 2 (:, 1234567) W 2 (:, 2345678) W 2 (:, 1345678) W 2 (:, 1234678) W 2 (:, 1245678) W 2 (:, 1235678) W 2 (:, 1234578) W 2 (:, 1234568) W 2 (:, 12345678) n/a n/a n/a n/a n/a n/a n/a.